Microstructure and Tensile Behavior of a Nano-Structured Al-Fe Based Alloy
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第2期
论文作者：Tae-Yeub Ra Mok-Soon Kim Won-Yong Kim Jae-Sung Park
Key words：microstructure; tensile deformation; A1-Fe based alloy; spray forming; extrusion; warm rolling; precipitation; strain rate sensitivity;
Abstract: Room temperature deformation behavior of A1-8Fe-2Mo-2V-1Zr alloy produced by spray forming and subsequent warm-extrusion at 693 K and/or rolling at 423 K was investigated in terms of tensile test and microstructural observation.In the specimen processed by spray forming and warm extrusion, the microstructure consisting of equiaxed grains with the average grain size of 500 nm in the matrix phase and uniformly dispersed fine intermetallic A13(Fe, Mo, V, Zr) and A16(Fe, Mo, V, Zr) phases less than 100 nm was characterized. It was revealed that subsequent warm rolling after warm extrusion promotes precipitation of a fine dispersoid from the supersaturated matrix phase. Warm rolling was found to be effective to increase the yield and tensile strength in the high strain rate regime. Elongation of the warm rolled specimen showed highe r value than extruded specimen over the whole strain rate region studied.
Tae-Yeub Ra1，Mok-Soon Kim2，Won-Yong Kim1，Jae-Sung Park2
(1.Advanced Materials R&D Center,Korea Institute of Industrial Technology # 472,Kajwa-dong,Suh-gu,Incheon 404-254,Korea;
2.School of Materials Science and Engineering,Inha University # 253,Yonghyun-dong,Nam-gu,Incheon 402-751,Korea)
Abstract:Room temperature deformation behavior of A1-8Fe-2Mo-2V-1Zr alloy produced by spray forming and subsequent warm-extrusion at 693 K and/or rolling at 423 K was investigated in terms of tensile test and microstructural observation.In the specimen processed by spray forming and warm extrusion, the microstructure consisting of equiaxed grains with the average grain size of 500 nm in the matrix phase and uniformly dispersed fine intermetallic A13(Fe, Mo, V, Zr) and A16(Fe, Mo, V, Zr) phases less than 100 nm was characterized. It was revealed that subsequent warm rolling after warm extrusion promotes precipitation of a fine dispersoid from the supersaturated matrix phase. Warm rolling was found to be effective to increase the yield and tensile strength in the high strain rate regime. Elongation of the warm rolled specimen showed highe r value than extruded specimen over the whole strain rate region studied.
Key words:microstructure; tensile deformation; A1-Fe based alloy; spray forming; extrusion; warm rolling; precipitation; strain rate sensitivity;
【全文内容正在添加中】
