Li Jingui, Wang Lean, Qian Xinyuan. The Proposal Concerning Practising the System of Production Certificate for Civil Aviation Materials[J]. Journal of Materials Engineering, 1994, 0(10): 2-3,17.
In this paper,according to the in ternational practice and the national condition,authors propose to found a organization of “Preduction Certification Committee and its office, Examine Group and Preduction Certification Represen tative of Civil Aviation Materials”for carrying out production certification of civil aviation materials and forging.
Lai Shihong. The Present Situation and the Development Trend of Aeronautical Structural Adhesive Systems[J]. Journal of Materials Engineering, 1994, 0(10): 4-7.
In the paper, the present situation of aeronautical structural adhesive systems and their applieation both at home and abroad are summaried.The future development and the main rescarch subjects in this field of our country have been suggested also.
Chen Xiangbao. The Development of Repair of Composite Structure[J]. Journal of Materials Engineering, 1994, 0(10): 8-11.
The extensive use of advanced composite materials in aerospace industry has proven to be an effective means of improving aircraft performance. The tremendous growth in their application has increased the need for reliable repair systems. A review of composite structure repair technology efforts is given.It is shown that composite structure,designed in a variety of configuration and for a wide range of load intensitie scan effectively be repaired to almost all their original strength.
Gu Tian, Jin Jianjun, Zhong Ping, Wang Hongtao. A New Ultra-HighStrength Steel 16NiCo for Aerospace Application[J]. Journal of Materials Engineering, 1994, 0(10): 18-21.
A highly alloyed secondary hardening steel 16NiCo has been studying for more than three years.The optimum alloy compeition of the steel should be 0.16C-2Cr-10Ni-1Mo-14Co. After quenching and ag-ing,the microstructure is composed of highly dislocated lath martensite,a small amounts of interlath retained austenite and twinnig,and some carbides which strengthening the alloy. This stecl possessed excellent combined mechanical properties,the typical mechanical values are as follows:the ultimate strength of 1740MPa,the plane fracture toughness KIC of 153MPa √mand and the KISCC of 82MPa√m. 16NiCo met the requirements of aerospace application,and could be widely used to manufacture the critieal joints,horizontal stabilator shaft,arresting hooks and carrier-based aircraft landing gears,etc.
Gui Zhonglou, Chen Lijiang. Applicction of Artificial Neural Networks in the Design of Single Crystal Superalloys[J]. Journal of Materials Engineering, 1994, 0(10): 22-24,31.
A new technique artificial neural network which is recently developed and has a powerful funtion of processing data,has been applied to predicting creep rupture life in the design of single crystal superalloys Comparision of method of artificial neural network and other methods has been taken,the results indicate that predication of creep rupture life by the method of artificial neural network is the mort accurates.
Ma Longzhou, Cui Jianzhong, Zhang Xiaobo. The Effect of Homogenizing Annealing on Forming Property and Mechanical Property in Al-Mg一Li alloy(01420)[J]. Journal of Materials Engineering, 1994, 0(10): 25-28.
In this paper,the effects of homogenizing regulation on hot-forming proporty and mechanical property alloy 01420 is studied, after alloy is homogenizied. The results show that the effects of homogenizing regulation on property is very obvious,when the homogenizing of alloy is not enough or alloy is buring,alloy during hot-rolling will crack and plasticity will be low. After being homogenizied at 475℃ for 48 hours, the distribution of magnesium atom is homogeneous and alloy is of the best synthetical property.
Yuan Kaihua, Rong Ailun. Study on Fractal Dimension of Sutface Morphology Befote r After the Structure-change by STM[J]. Journal of Materials Engineering, 1994, 0(10): 32-34.
STM has been used to investigate the nanometer-scale morphology of the surface of recording media before or after the structure change. Combining the image-processing software with Fourier analysis method,STM can be used properly to study the fractal property of the morphology of the films The morphology of the amorphous film,which is prepared by electron beam evaporation method isplays fractal property in nanometer scale. After heating,the film transforms from non-crystalline state to crystalline state,and the fractal dimension of its surface morphology increases.
Zeng Chaoliu, Shen Huaqing, Wu Weital, Zhu Shenglong, Guo Jianting. Hot Corrosion of Ni3Al Intermetallics and Its Sputtered CoCrAlY Coating[J]. Journal of Materials Engineering, 1994, 0(10): 35-37.
Hot corrosion of Ni3Al intermetallic compound and sputtered COCrAlY coating on Ni3Al in the presence of(Na,K)2SO4 salts film at 900～950℃ in air were studied. It is shown that Ni3Al suffers hot corrosion, and sputtered CoCrAlY coating can grcatly improve hot corrosion resistance of Ni3Al by the formation of protective Al,Cr oxides scale.
Chen Jian, Zheng Qi, Yu Yang, Tang Yajun, Hu Zhuangqi. A Method for Determing the Parameter of Directionally Solidification[J]. Journal of Materials Engineering, 1994, 0(10): 38-39.
The temperature gradient and solid/liquid. interface position was determed by continuously measuring the top surface temperature of the sample. It was found that the pulling speed affect the temperature gradient slighly,but it has large effect on the solid/liquid interface position. The solid/liquid interface was pulled away from the hot zone with the increasing of the pulling speed.
Feng Weixi. The New Approach of International Standardization on Aerospace Materials[J]. Journal of Materials Engineering, 1994, 0(10): 40-41.
The altering preeess from foundation to dissolution of ISO/TC20/SC11( Aerospace Materials and Processes)was intredueed. The new approach on ISO “Recognition”of existing aerospace standards which will be used in ISO/TC20 was also intreduced. In addition a useful handthek “International Aerospace Spocification Equivalency Handbook for Aluminum”prepared by NATO and recommended by ISO/TC20 was introduced.
