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Nanometer Materials & Nanotechology and. Their Application Prospect
ZHANG Zhongtai, LIN Yuanhua, TANG Zilong, ZHANG Junying
Journal of Materials Engineering    2000, 0 (3): 42-48.   DOI:
Abstract   PDF (323KB)
The properties of electronics, mechanics, magnetics and optics of nanometer materials were changed greatly because of their particular surface effect, volume effect and quantum size effect Nanotechnology was applied successfully to fine ceramics, microelectronics, bioengineering, chemical engineering and pharmacy fields.Its widely applied prospect made nanometer materials and corresponding nanotechnology become one of the hot topics in the scientific research field, which have great improvements on the materials'super-plasticity and high-strength, these characteristics have significant effects on the electronics, thermal dynamics, magnetics and optics of materials, they are regarded as another industrial revolution in the 21th century.
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The Status and Future on Research and Application about Carbon/Carbon Composites in the Aeronautical Area
Li Hejun, Luo Ruiying, Yang Zheng
Journal of Materials Engineering    1997, 0 (8): 8-10.   DOI:
Abstract   PDF (126KB)
The present status of research and application about the aircraft brake disk and the engine hot components manufactured by carbon/carbon (C/C) composites in the world has been introduced in the paper.The problems in the studying works and the development directions about this field on the future have been discussed.
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Novel Progress of Application and Surface-modification Technique for Nano-particles Materials
ZHANG Xin-ya, SHEN Hui-fang, HUANG Hong, LAN Ren-hua, CHEN Huan-qin
Journal of Materials Engineering    2005, 0 (10): 58-63.   DOI:
Abstract   PDF (1478KB)
Main reasons of nano-particles conglomerating is introduced,the progress of physical and chemical surface-modification techniques of the nano-particles is discussed.And finally the latest application of nano-particle in coatings,plastic,rubber and other fields is also reviewed.
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Reaserch Progress in Advanced Materials of High-entropy Alloys
LIANG Xiu-bing, WEI Min, CHENG Jiang-bo, ZHANG Wei, XU Bin-shi
Journal of Materials Engineering    2009, 0 (12): 75-79.   DOI:
Abstract   PDF (729KB)
High-entropy alloys were newly developed alloys that were composed,by definition,of at least five principal elements with concentration in the range of 5%-35%(molar fraction).Therefore,the alloying behavior of any given principal element was significantly affected by all the other principal elements presented.The definition,distinguished structure and performance characteristics,as well as the potential applications of high-entropy alloys were introduced.In addition,the historical development and the latest research progress in this field are also summarized.
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Development of Aluminum-Lithium Alloys
YANG Shou-jie, LU Zheng, SU Bin, Dai, Sheng-long, LIU Bo-cao, Yan Ming-gao
Journal of Materials Engineering    2001, 0 (5): 44-47.   DOI:
Abstract   PDF (265KB)
The history of aluminum-lithium alloys was reviewed.It can be concluded that the alloys could be classified three generations according to time and their properties.Further more,the development of the third generation of Al-Li alloys were investigated in detail.A tendency of the third generation of Al-Li alloys is to develop some new alloys with certain excellent properties.
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Journal of Materials Engineering    2000, 0 (2): 45-48.   DOI:
Abstract   PDF (160KB)
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Relationship Between Fatigue Notch Factor Kf and Stress Concentration Factor Kt
HU Ben-run, LIU Jian-zhong, CHEN Jian-feng
Journal of Materials Engineering    2007, 0 (7): 70-73.   DOI:
Abstract   PDF (516KB)
Fatigue notch factor Kf is usually used to express the reduction in fatigue strength of the component notch.The factor of Kf is very useful in fatigue design.In this paper analysis for many fatigue limit of aluminum alloy,titanium alloy and steel with stress ratio of 0.5,0.06,-1 showed that the relation between most of Kt and Kf is linear except some case.The relation of Kf and Kt not only depends on the kinds of material but also on the stress ratios.
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Status of Research on Material Damping and Damping Alloys
LI Pei-yong, DAI Sheng-long, LIU Da-bo, CHAI Shi-chang, LI Yu-ren
Journal of Materials Engineering    1999, 0 (8): 44-48.   DOI:
Abstract   PDF (571KB)
The material damping characteristic and its measuring parameters were introduced. The status of research on the testing methods of damping capacity, damping alloys and their damping mechanisms were also reviewed. In addition, the problems existing in the applications of conventional damping alloys were pointed out.
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Structure and Properties of Cellulose Triacetate
WANG Wen-jun, LI Yin, MEN Shuang, SHAO Zi-qiang
Journal of Materials Engineering    2007, 0 (8): 49-52.   DOI:
Abstract   PDF (1091KB)
Cellulose triacetate(CTA)was prepared in the presence of mixture of acetic anhydride/acetic acid/H2SO4.The structure and properties of cellulose triacetate acetylation were determined by IR,1H-NMR,XRD,DSC and chemical analysis.The results showed that acetyl mass fraction of all CTA samples were at least 60%,the most active reaction position on the anhydroglulose unit was C-6.Compared with that of cellulose,the crystallinity of CTA was much lower,but the processability was improved a lot.
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Current Status of Ceramics Materials in Electromagnetic Wave Absorbing
SUN Jing-jing, LI Jian-bao, ZHANG Bo, ZHAI Hua-zhang, SUN Ge-liang
Journal of Materials Engineering    2003, 0 (2): 43-47.   DOI:
Abstract   PDF (424KB)
This paper first summarizes simply the mechanism of the electromagnetic wave absorbing as a background knowledge, and the types of absorbing materials according to different standards. Secondly, the current status of ceramic absorbing materials is reviewed in detail, which takes the examples of silicon carbon and ferrite. Finally, the investigation in this field of our lab is introduced.
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Structure and Characteristic of ABO3-Type Oxide and Its Application
XIANG Yong, XIE Dao-hua
Journal of Materials Engineering    2000, 0 (9): 15-18.   DOI:
Abstract   PDF (190KB)
All kinds of ABO3-type oxides are summarized,including various crystal structure and their electrical,optical,acoustics properties.It is discussed that ABO3-type crystal and ceramic materials are applied and developed widely in the fields about modern electronics and information,aerospace,defense and military.
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Laser Solid Forming of Metal Powder Materials
HUANG Wei-dong, LI Yan-min, FENG Li-ping, CHEN Jing, YANG Hai-ou, LIN Xin
Journal of Materials Engineering    2002, 0 (3): 40-43,27.   DOI:
Abstract   PDF (325KB)
The fundamental principle,development state,solidification microstructure and forming characters of laser solid forming(LSF) were investigated throughly.It was found that to acquire idea forming result,the height,width and the overlap rate of the single cladding layer must be accurately controlled.The forming principle of the microstructure was also studied during laser solid forming in this paper.The microstructure of the sample was made up of thin and long epitaxial growth dendrites,the primary spacing of which is about 10~30μm. The directional solidification microstructure or even single crystal was obtained based on the rigid processing characters control.Combining the research results of the forming character,the samples with different metal were obtained by using optimized processing characters.The inner part of the sample wa dense,the surface quality was fine and was free of defect.
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Research on Mechanism of Direct Metal Laser Sintering
GU Dong-dong, SHEN Yi-fu, PAN Yan-feng, XU Cheng-ting
Journal of Materials Engineering    2004, 0 (5): 42-48.   DOI:
Abstract   PDF (519KB)
Sintering mechanism of the single-component/multi-component metal powders and the pre-alloyed powders during Direct Metal Laser Sintering (DMLS) process were analyzed. The material properties such as surface tension, viscosity, particle size and its distribution, and absorbance/ reflectivity together with the processing variables such as laser parameters, layering thickness of powders, atmospheric control, bed pre-heating temperature, and sintering assisted material, which affect sintering and densification of DMLS-processed parts, were discussed. The further directions of the research method in DMLS were addressed.
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Properties of Polyimide Films Based on ODPA and ODA by Thermal and Chemical Imidization
CHENG Ru, ZHU Meng-bing, HUANG Pei
Journal of Materials Engineering    2007, 0 (7): 51-54,58.   DOI:
Abstract   PDF (1040KB)
Two kinds of polyimide films were prepared based on the ODA and ODPA in NMP through two-step thermal or chemical imidization process and characterized by the cone and plate viscosimeter,GPC,FTIR,DSC,TGA and strain properties tests.The results showed that the films prepared from different imidizations had been totally transformed to polyimide films.The glass transition temperature,thermal decomposing temperature of the film from chemical imidization is higher than the one from thermal imidization.The strain tests showed that the film from thermal imidization had larger elongation at break,and the film from chemical imidization had larger tensile strength and elasticity modulus.
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Synthetic Evaluation on Stress Corrosion Testing Methods of High Strength Aluminum Alloys
LIU Ji-hua
Journal of Materials Engineering    2007, 0 (10): 76-80.   DOI:
Abstract   PDF (1123KB)
The stress corrosion testing methods of high strength aluminum alloys are reviewed.The principles and applications of these methods are presented.The advantages and shortcomings of those methods are analyzed.Because only one method can not evaluate the stress corrosion properties of aluminum alloys comprehensively,it would be better to measure aluminum alloys with different testing methods mentioned.
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Preparation and Characterization of Polymethacrylimide Foams
QU Chun-yan, XIE Ke-lei, MA Ying-jian, WANG De-zhi
Journal of Materials Engineering    2008, 0 (11): 19-23.   DOI:
Abstract   PDF (497KB)
Polymethacrylimide(PMI)foams were prepared by the casting process using methacrylic acid(MAA)and methacrylonitrile(MAN)as monomers.The structure and properties of the PMI foams were analyzed by infrared adsorption spectrum(FTIR),optical microscope,differential scanning calorimeter(DSC)and thermogravimeter(TG).The results show that the foamable MAA/MAN copolymers were prepared at 40-60℃ by polymerizing the mixture of 50phr MAA,50phr MAN,1-5phr magnesium oxide,2-8phr butanol and tert-butanol,0.2-0.3phr dibenzoyl peroxide and tert-butyl perbenzoate and 0.1-0.2phr DMF.Then the resulting copolymers were expanded at 200-220℃ for 2-3h,subsequently treated at 160℃ for 5-6h,generating PMI foams with excellent mechanical properties and heat-resistance.Molecular rearrangement reaction occurs during the foaming and post-treatment forming hexahydric imide ring.The prepared PMI foams have closed cell structure with the cell size ranging from 0.5mm to 0.7mm and have a good thermostability with the characteristic degradation temperature at about 221.5℃.
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Progress in Preparation and Research of High Entropy Alloys
CHEN Yong-xing, ZHU Sheng, WANG Xiao-ming, DU Wen-bo, ZHANG Yao
Journal of Materials Engineering    2017, 45 (11): 129-138.   DOI: 10.11868/j.issn.1001-4381.2015.001124
Abstract   PDF (1664KB)
The current high entropy alloys' studies are most in block, powder, coating, film and other areas. There are few studies of high entropy alloys in other areas and they are lack of unified classification. According to the current high entropy alloys' research situation, The paper has focused on the classification on all kinds of high entropy alloys having been researched, introduced the selecting principle of elements, summarized the preparation methods, reviewed the research institutions, research methods and research contents of high entropy alloys, prospected the application prospect of high entropy alloys, put forward a series of scientific problems of high entropy alloys, including less research on mechanism, incomplete performance research, unsystematic thermal stability study, preparation process parameters to be optimized, lightweight high entropy alloys' design, the expansion on the research field, etc, and the solutions have been given. Those have certain guiding significance for the expansion of the application of high entropy alloys subjects in the future research direction.
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Electroconductive Polymer Composites for Shielding EMI
Tan Songting, Zhang Mingqiu, Zeng Hanmin
Journal of Materials Engineering    1998, 0 (5): 6-9.   DOI:
Abstract   PDF (240KB)
The preparation methods of electroconductive polymer composites for shielding electromagnetic interference(EMI) were introduced, and the main factors affecting shielding effectiveness of the composites, such as species, shape, filler content of electroconductive filler and different composite technological, were discussed in this paper.
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Research of Graphene-reinforced Aluminum Matrix Nanocomposites
YAN Shao-jiu, YANG Cheng, HONG Qi-hu, CHEN Jun-zhou, LIU Da-bo, DAI Sheng-long
Journal of Materials Engineering    2014, 0 (4): 1-6.   DOI: 10.3969/j.issn.1001-4381.2014.04.001
Abstract   PDF (3277KB)
Graphene-reinforced aluminum matrix nanocomposites were successfully synthesized through ball milling and powder metallurgy. The tensile strength and yield strength of graphene-reinforced aluminum matrix nanocomposites are remarkably enhanced by adding graphene nanoflakes(GNFs). Importantly, the ductility properties are remained excellently, which is firstly found in the second phase reinforced metal matrix nanocomposites. The microstructures were observed by OM, SEM and TEM method. And the tensile properties were tested.The results show that graphene nanoflakes are effectively dispersed and well consolidate with aluminum matrix, however, chemical reactions are not observed. The original structured characteristics of graphene nanoflakes are preserved very well. The average tensile strength and yield strength of nanocomposite are 454MPa and 322MPa, respectively,which are 25% and 58% higher than the pristine aluminum alloy at a nanofiller mass fraction of 0.3%, while the ductility increases slightly. The relevant mechanisms of strengthening and toughening enhancement are discussed on the base of 2D and wrinkled structured properties of graphene nanoflakes.
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Mechanical Properties of Laves Phase Alloys
LU Shi-qiang, HUANG Bai-yun, HE Yue-hui, HE Shuang-zhen, DENG Yi-da
Journal of Materials Engineering    2003, 0 (5): 43-47.   DOI:
Abstract   PDF (221KB)
Mechanical properties and their present research levels of some Laves phase alloys are introduced,including hardness,strength,ductility,mechanical behavior and fracture toughness.The further research directions for Laves phase alloys are suggested.
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Development Trends in First-principles Calculation Simulation Study of TiO2-based Nanomaterials
ZHANG Xiang-chao, YANG Hua-ming, TAO Qiu-fen
Journal of Materials Engineering    2008, 0 (1): 76-80.   DOI:
Abstract   PDF (946KB)
The nature physics-chemical property and the present experimental investigation of nano-titanium dioxide(TiO2)was briefly introduced.The investigation progress of calculation simulation about the microstructure,photocatalysis and modification of TiO2-based nanomaterials using first-principles calculations based on density functional theory(DFT)had importantly discussed in detail.The problem existed nowadays and the development trends in this field were pointed out.
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Progress in Research on Preparation and Application of Graphene Composites
YANG Wen-bin, ZHANG Li, LIU Jing-wei, LIU Huan-rui, TANG Bing-hua
Journal of Materials Engineering    2015, 43 (3): 91-97.   DOI: 10.11868/j.issn.1001-4381.2015.03.016
Abstract   PDF (637KB)
Graphene is a single atomic layer structure, which is the thinnest 2-D planar sheet composed of sp2-bonded carbon atoms. The special structure of graphene has excellent properties, such as photoelectric property, heat stability and mechanical properties. There has been increasing attention to preparation, property and application of graphene composites in recent years. In the paper, preparation methods of graphene composites is reviewed, such as graphene/polymer composites, graphene/metal (metal oxide) composites, and ternary composites of graphene. The advances in application of graphene composites are also reviewed, such as in lithium battery, supercapacitors, photovoltaic devices, sensor applications. Furthermore, the important research direction of graphene composites is pointed out.
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Anisotropy of Stress Rupture Properties of DD6 Single Crystal Superalloy at 980℃/250MPa Near [001] Orientation
YU Jian, LI Jia-rong, HAN Mei, SHI Zhen-xue, LIU Shi-zhong
Journal of Materials Engineering    2012, 0 (4): 1-5.   DOI:
Abstract   PDF (2983KB)
The DD6 single crystal superalloy with various orientations was tested at 980℃/250MPa. The influence of orientation on the stress rupture properties at 980℃ was investigated. The results showed that DD6 single crystal superalloy with orientation deviated from [001] direction within 15? exhibited almost the same stress rupture lives at 980℃/250MPa, and there was no anisotropic behavior. The reason of no anisotropic stress rupture properties at 980℃/250MPa was multiple 〈110〉{111} slip systems operated. The γ′ raft caused by the atom diffusion and the dislocation networks formed on γ/γ′ also reduced the anisotropy of stress rupture properties.
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The Electric and Absorbing Wave Properties of Fibers in Structural Radar Absorbing Materials
LUO Fa, ZHOU Wan-cheng, ZHAO Dong-lin
Journal of Materials Engineering    2000, 0 (2): 37-40.   DOI:
Abstract   PDF (223KB)
The electric and absorbing wave properties of fibers in structural radar absorbing material are reviewed. Glass fibers and Kevlar fibers are transparent to radar wave. Carbon fiber graphited at high temperatures strongly reflects the radar wave. Ungraphited carbon fiber reflects radar wave when it is parallel to the electric filed and absorbs radar wave when it is perpendicular or oblique to the electric filed. The radar wave absorption of SiC fiber is related to the fiber′s composition and processing temperatures. During fabrication of SiCf/glass ceramic composites, reaction takes place between fiber and matrix. As a result, a carbon rich layer interface is formed. It facilitates the radar wave absorption of the composites.
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Research Status and Key Technologies of 3D Printing
ZHANG Xue-jun, TANG Si-yi, ZHAO Heng-yue, GUO Shao-qing, LI Neng, SUN Bing-bing, CHEN Bing-qing
Journal of Materials Engineering    2016, 44 (2): 122-128.   DOI: 10.11868/j.issn.1001-4381.2016.02.019
Abstract   PDF (2336KB)
After introducing the principle and classification of 3D printing, methods for metal forming using 3D printing were reviewed in details, including electron beam melting(EBM), selective laser melting(SLM), laser direct melting deposition(LDMD). The application fields of metal 3D printing and research status overseas and domestic were also discussed in this paper. At last, based on the current development of metal 3D printing, this paper summarized the key issues that should be solved, which include the quality of powders, the usage of 3D printing equipments, nondestructive testing for 3D printing components, the failure analysis and prediction of lifecycles for 3D printing components. The standards of nondestructive testing for 3D printing components should be established and the database of comprehensive mechanical properties for 3D printing materials should be built.
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Development Trends of Advanced Composite in Near Term
CHEN Shao-jie
Journal of Materials Engineering    2004, 0 (9): 9-13,18.   DOI:
Abstract   PDF (1419KB)
The development trends of advanced composite in near term are introduced,including some aspects of become-manyfaceted,low-cost,internationalization and standardization.
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Advances in Study of Thermal Conducting Polymers Composites and Their Application
MA Chuan-guo, RONG Min-zhi, ZHANG Ming-qiu
Journal of Materials Engineering    2002, 0 (7): 40-45.   DOI:
Abstract   PDF (363KB)
The background of application and search of thermal conducting polymers was reviewed.The progress in the study of thermal conductive plastics、rubbers and adhesions in recent years were described, thermal conducting mechanism of polymer composites was commented and several pieces of advice were given to obtain effective thermal conductive polymer composites.
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Effect of Nd Addition on the Microstructure and Mechanical Properties of Mg-6Zn-Mn Magnesium Alloy
ZHANG Ding-fei, ZHANG Hong-ju, DUAN Zuo-heng, QI Fu-gang, PAN Fu-sheng
Journal of Materials Engineering    2013, 0 (3): 1-5.   DOI: 10.3969/j.issn.1001-4381.2013.03.001
Abstract   PDF (3544KB)
The microstructure and mechanical properties of as-extruded Mg-6Zn-Mn magnesium alloy with different Nd content were investigated by OM, XRD and tensile testing, respectively. It was found that the dendrite arm spacing of as-cast Mg-6Zn-Mn magnesium alloys was effectively decreased with Nd addition. Furthermore, the microstructure of Mg-6Zn-Mn magnesium alloys changed significantly after hot extrusion at 360℃ with Nd doped under extrusion ratios of 25. The Mg-6Zn-Mn magnesium alloy with 0.2% Nd shows the highest yield strength (about 250 MPa) and ultimate strength (above 300MPa) by tensile tests at room temperature.
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Research Status on Strengthening Mechanism of Particle-reinforced Metal Matrix Composites
YE Xiang-ping, LI Ying-lei, WENG Ji-dong, CAI Ling-cang, LIU Cang-li
Journal of Materials Engineering    2018, 46 (12): 28-37.   DOI: 10.11868/j.issn.1001-4381.2016.001214
Abstract   PDF (40898KB)
The research status on theoretic models and the coupling relationships of Orowan strengthening, dislocation strengthening, load-bearing effect of the reinforcement strengthening and others strengthening are successfully described in this study for particle-reinforced metal matrix composites(MMCs) with a volume fraction lower than 14%. Some conclusions can be obtained:Orowan strengthening and dislocation strengthening stress can be enhanced by increasing volume fraction, decreasing size of reinforcement and improving homogeneous distribution of reinforcement, load-bearing strengthening stress can also be enhanced by increasing volume fraction; yield strength and ductibility of MMCs can be enhanced much more by increasing load-bearing strengthening stress and plastic deformation region and adopting the material design method of metal matrix surrounded by particles with microstructural inhomogenous distribution; grain boundary strengthening and Peierls-Nabarro stress can also affect the yield strength of MMCs as a part of matrix strengthening, solid solution strengthening can be ignored usually; there are three coupling relationships for the sum strengthening contributions:linear summation, multiplicative combination and the root of the sum of the squares. The linear summation and multiplicative combination can be applied to nanoparticle-reinforced MMCs, the linear summation is generally applicable in the case when there are few factors influencing the strength, the multiplicative combination is the most commonly used method. The root of the sum of the squares is applied to micronparticle-reinforced MMCs.
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Study on Creep Law of Metal
JIN Yao, SUN Ya-fang, SUN Xun-fang, DENG Yong, LIU Hong-jie, TU Yong
Journal of Materials Engineering    2001, 0 (1): 40-42.   DOI:
Abstract   PDF (685KB)
With material internal state varying, creep behavior keeps on changing during creep. A creep law which takes account of damage and hardening influence is proposed. Creep behavior of 12Cr1MoV steel is discussed. Analysis shows that creep rate keeps changing during creep. The secondary stage of creep is merely relative steady stage, and degree of relative steady and duration life fraction depend on applied stress. Different stresses cause the same damage state but different hardening state in conditions of the same exposure time fraction.
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