Peng Yanping, Zeng Fanchang, Wang Junjie, Zhang Yining, Xia Shaoyu. Development, Application and Feature of Titanium Alloys in Foreign Aviation Industry[J]. Journal of Materials Engineering, 1997, 0(10): 3-6.
Development,application and feature of titanium alloys in foreign aviation industry is reviewed with emphasis on the titanium alloys used for American and Russian aircrafts. Suggestion on research and development of titanium alloy in China is proposed.
Feng Lidan. The New Polymer Chiral Catalysts[J]. Journal of Materials Engineering, 1997, 0(10): 7-8.
The new polymer chiral catalysts and the asymmetric epoxidation reaction were introduced. The application of new polymer chiral catalysts in asymmetric epoxidation reaction as well as checking test were also described.
Zeng Rong, Zeng Hanmin. Formation of the Conductive Path in Conductive Polymer Composites[J]. Journal of Materials Engineering, 1997, 0(10): 9-13.
Several models about the formation of the conductive path in conductive polymer composites were reviewed, including statistics, thermodynamics, effective medium and microstructure models. The models and real system were analyzed and compared. We think a better interpretation of the formation mechanism of the conductive path must be on the basis of nonequilibrium thermodynamics, nonlinear dynamics and fractal structure.
Chen Kai, Yu Menghuai, Hu Shangxu, Yu Sirong, He Zhenming. Neural Network Simulation on Mechanical Properties of ZA22/Al2O3f Composites[J]. Journal of Materials Engineering, 1997, 0(10): 14-16.
The typical model of neural network e.g. B-P algorithm was adopted to analyze as well as predict the mechanical properties of ZA22/Al2O3f composites. The results show that B-P model is not only suitable for the regression and prediction for the single variable output non-liner system, but also suitable for the multi-variables output non-liner system. Perfect fault tolerance ability was also found in the B-P model while it was used to analyze the mechanical properties of ZA22/Al2O3f composites.
Gao Jiacheng, Song Qinian, Zhang Yaping, Xu Weihun, Liu Rongdi, Li Yuanchun. Experimental Study of Coating on Oxygen Lance for Resistance Sticking[J]. Journal of Materials Engineering, 1997, 0(10): 17-18,16.
It is usually happened that the molden steel-slag splashes and then sticks on the surface of the oxygen lance, especially during the semisteel making. In this paper,a new process has been developed successfully to coat high-temperature graded ceramic coatings for resistance sticking on the surface of the oxygen lance. With the coating, there is hardly any stick on the surface of the oxygen lance,the life of the oxygen lance is increased by a factor 15%. The bonding strength,spalling resistance and wetting properties of the coating layer are also discussed.
Le Qichi, Cui Jianzhong. The Mechanical Properties and the Characteristics of Tensile Fracture of Mg-Li Alloy[J]. Journal of Materials Engineering, 1997, 0(10): 19-22,42.
The Density and the mechanical properties of Mg-Li binary alloy were investigated in this paper,and the effects of Ag and Li on the mechanical properties of the optimum orthogonal alloy (Mg-7Li-14Zn-0.57La-1.0Ce-1.22Nd-1.6Ag)were discussed. Its results indicated that the density of binary alloy decreased with increasing the quantity of Li, and Mg-10.3Li had a better combination of mechanical properties, the tensile strength of the optimum orthogonal alloy almost increased linearly as the addition of Ag.However,the effect of Li on mechanical properties of optimum orthogonal alloy was different from that of the binary. The examination of the tensile fracture found that the binary alloy was ductile fracture,the Mg-7Li-14Zn ternary alloy was typically intercrystalline fracture, and the optimum orthogonal alloy was ductile-cleavage-intercrystalline fracture.
Tian Jun, Xue Qunji. Reduction Effect of Flow Noise in Low Frequency[J]. Journal of Materials Engineering, 1997, 0(10): 23-24,31.
The flow noise reduction of Al alloy model with low surface energy coatings have been studied in a water tunnel. The results are compared with measured previously an Al alloy model, large difference are formed between Al model and covered low surface energy coating, the flow noise of covered coating model were capable of decreasing 3～19dB in 1～1.6kHz. The surface structure of covered coating model contributed to its inhomogeneous components of laminar powder by increasing bond between water and coating to turbulent flow of the boundary layer and decreasing the eddy size of boundary layers.
Wan Yizao, Luo Honglin, Zhou Xianliang, Wu Jiahong, Liu Yan. Study on Fabrication of Metallic Ceramic Coatings by Thermochemical Reaction Method[J]. Journal of Materials Engineering, 1997, 0(10): 25-28.
The fabricating process of metallic ceramic coatings by thermochemical reaction method was studied. The phase structure and microstructure of the coatings were also investigated in this paper. Results showed continuous, dense and well-adhered coatings could be obtained by this process. A medium carbon steel coated by this method exhibited excellent resistance to corrosion.
Zhao Yan, Duan Yuexin, Zhang Tan, Liang Zhiyong. Study on Epoxy System Cured by Middle Temperatrure in RTM[J]. Journal of Materials Engineering, 1997, 0(10): 29-31.
Through studying up on curing,viscosity, DMA and stretch of middle temperature solidified epoxy matrix system being used for RTM, we think this epoxy system basically satisfies technological requirements of RTM, and it can be further improved.
Wu Chongzhou. Technique Research of PTFE Electrodusting[J]. Journal of Materials Engineering, 1997, 0(10): 32-33.
This subject studies the tachnique of PTFE electrodusting, and effect factors it. The voltage of electrodusting, pressure of supply powder and pressure of spray are of great importance to electrodusting,the flowing pressure is of small importance, temperature and humidity have little effect, the distance of spray also has an effect on electrodesting.
Yang Jianliang, Xiang Qing, Huang Dexiu, Guo Zhaohua. A Novel Non-Destructive Evaluation Method of Structure State in Composite Material[J]. Journal of Materials Engineering, 1997, 0(10): 34-36.
A novel fiberoptic sensor which is embedded in composite material and structures to form a fiberoptic sensor network is presented in this paper. This sensor network can be used to measure the structure state in composite material such as strain or damage and so on, and the experimental results have shown the feasibility of this measurement method.
Xie Gongtong, Xia Liming, Sun Yongchang. Development of W Type of Wear Tester[J]. Journal of Materials Engineering, 1997, 0(10): 37-39.
This paper describes a new type of wear tester. The testing precision have been increased by means of friction coefficient recorded by the straingauge. A type of ball-tray pair of friction is applied to improve comparability of wearing capacity.
Zhang Zheng, Jia Guodong, Yu Rongli, Su Mei, Chen Chinan, Zhong Qunpeng. Failure Analysis on Tractive Hoop[J]. Journal of Materials Engineering, 1997, 0(10): 40-42.
In this paper, according to analysis on failure part and normal part, the sulphide distributing along boundary, coarse original austenitic grains and intergranular dimples in the microstructure are found, so it can conclude that fracture of tractive hoop is caused by local overheat. It is also shown that fracture of tractive hoop happened before plastical deformation.
Liu Shixing. Introduction of Two New National Standards—Wrought Aluminium and Aluminium Alloys Designation System and Temper Designation System[J]. Journal of Materials Engineering, 1997, 0(10): 43-47.
This paper introduces the background materials,process,content and recomended implementation of the new national standards-wrought aluminium and aluminium alloys designation system and temper designation system—for manufacturing,applying,teaching as well as trade and technical exchange of wrought aluminium alloys.
