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Microstructure, texture and mechanical studies of an inconspicuous shear band formed during hot compression of Ti-6Al-4V alloy
Liu, Chengze; Guan, Hong; Tai, Qingan; Yuan, Fusen; Han, Fuzhou; Gu, Hengfei; Zhang, Lifeng; Li, Geping; Li, GP (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2017-06-20
发表期刊MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
卷号698页码:18-26
摘要Systematical studies on an inconspicuous shear band formed during hot isothermal forging of Ti-6A1-4V alloy were carried out. During the compression of Ti-6A1-4V alloy in high reduction (> 50%), severe shear strain concentrated in the maximum shearing plane in the geometric center of the bulk samples leading to the nucleation of shear band (SB). Grains in SB were refined and elongated with their long axis parallel to the local shearing direction. Electron backscattered diffraction (EBSD) analysis showed that grains in SB were not strongly orientated containing two weak orientations making {0001} planes of cc phase parallel to the compression direction, and {1010} planes of a phase parallel to the compression direction and, meanwhile, the normal direction of its {0001} planes similar to 34 degrees away from the compression direction. The observed textures in SB were resulted from slipping and twinning during the hot compression. Pyramidal slip was preferred in SB as well as in its surrounding matrix (M). In addition, {1011} < 1012 > twinning was preferentially activated in SB, which is different for M with {1012} < IOU > twinning preferred due to different plastic deformation degrees in SB and M during the hot compression. To evaluate the influence of SB on the mechanical properties of the alloy, micro hardness and tensile tests were employed. The alloy in SB had been proved to be slightly strengthened compared to M, which was resulted from both the grain refinement and the texture diversity.; Systematical studies on an inconspicuous shear band formed during hot isothermal forging of Ti-6A1-4V alloy were carried out. During the compression of Ti-6A1-4V alloy in high reduction (> 50%), severe shear strain concentrated in the maximum shearing plane in the geometric center of the bulk samples leading to the nucleation of shear band (SB). Grains in SB were refined and elongated with their long axis parallel to the local shearing direction. Electron backscattered diffraction (EBSD) analysis showed that grains in SB were not strongly orientated containing two weak orientations making {0001} planes of cc phase parallel to the compression direction, and {1010} planes of a phase parallel to the compression direction and, meanwhile, the normal direction of its {0001} planes similar to 34 degrees away from the compression direction. The observed textures in SB were resulted from slipping and twinning during the hot compression. Pyramidal slip was preferred in SB as well as in its surrounding matrix (M). In addition, {1011} < 1012 > twinning was preferentially activated in SB, which is different for M with {1012} < IOU > twinning preferred due to different plastic deformation degrees in SB and M during the hot compression. To evaluate the influence of SB on the mechanical properties of the alloy, micro hardness and tensile tests were employed. The alloy in SB had been proved to be slightly strengthened compared to M, which was resulted from both the grain refinement and the texture diversity.
部门归属[liu, chengze ; yuan, fusen ; han, fuzhou ; gu, hengfei ; zhang, lifeng ; li, geping] chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china ; [liu, chengze ; yuan, fusen ; han, fuzhou ; zhang, lifeng] univ sci & technol china, sch mat sci & engn, 96 jinzhai rd, hefei 230026, anhui, peoples r china ; [guan, hong ; tai, qingan] avic shenyang liming aeroengine grp corp ltd, 6 dongta rd, shenyang 110043, peoples r china
关键词Ti-6a1-4v Shear Band Microstructure Texture Ebsd
学科领域Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78081
专题中国科学院金属研究所
通讯作者Li, GP (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Liu, Chengze,Guan, Hong,Tai, Qingan,et al. Microstructure, texture and mechanical studies of an inconspicuous shear band formed during hot compression of Ti-6Al-4V alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2017,698:18-26.
APA Liu, Chengze.,Guan, Hong.,Tai, Qingan.,Yuan, Fusen.,Han, Fuzhou.,...&Li, GP .(2017).Microstructure, texture and mechanical studies of an inconspicuous shear band formed during hot compression of Ti-6Al-4V alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,698,18-26.
MLA Liu, Chengze,et al."Microstructure, texture and mechanical studies of an inconspicuous shear band formed during hot compression of Ti-6Al-4V alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 698(2017):18-26.
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