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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 8    No. 1    March 1998

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MICROSTRUCTURES AND MECHANICAL PROPERTIES OF SPUN PIPE BLANKS OF RS AlFeX ALLOY
Xiao Yude1 Li Wenxian1 Li Songrui1 and Wang Ricu1 Luo Qingying2

1.Department of Materials Science and Engineering, Central South University of Technology, Changsha 410083, P. R. China
2.The Third Research Institute of Aviation Industries of China, Beijing100074, P. R. China

Abstract:Two pipe blanks of rapidly solidified AlFeVSi alloy were prepared respectively by two kinds of different processings of rapid solidification-cold isostatic compact-hot extrusion and spray deposition-hot extrusion, and their microstructures and properties before and after hot extrusion were investigated comparatively using optical microscope, SEM, TEM and tensile test. The results showed that the pipe blank prepared by the former processing has higher strength and lower plasticity, and exhibits more intensive anisotropy than that of the latter, the main factors affecting the dissimilarity are degree of deformation, thickness of powder surface oxide film and cooling rate of solidification.

 

Key words: aluminum alloy extrusion rapid solidification spray deposition

ISSN 1672-7029
CN 43-1423/U

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