期刊
INTERMETALLICS
卷 97, 期 -, 页码 12-21出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2018.03.007
关键词
High entropy alloys; Strain path; Cryo-rolling; Microstructure; Texture; Hardness
资金
- DST, India [EMR/2016/002215]
- Swedish Research Council [2015-04087]
- Swedish Research Council [2015-04087] Funding Source: Swedish Research Council
The effect of strain path on microstructure, texture and hardness properties of AlCoCrFeNi2.1 eutectic high entropy alloy containing ordered FCC (L1(2)) and ordered BCC (B2) was investigated. The EHEA was cryo-rolled using UCR, MSCR (during which the samples were rotated by 90 degrees around the ND between each pass) and TSCR (45 degrees) (in which the samples were deformed by unidirectional rolling to half of the total strain and then diagonally rolled for rest half of the strain). The UCR processed material showed a rather heterogeneous microstructure. The textures of the L1(2)/FCC and B2 phases in the MSCR processed material agreed with the cross-rolling texture of the corresponding single phase materials, while the texture of the two phases in the TSCR(45 degrees) processed materials appeared rather weak. Upon annealing at 800 degrees C, the UCR processed materials showed a novel heterogeneous microstructure, while the MSCR and TSCR(45 degrees) processed materials revealed microduplex structure. The heterogeneous microstructure was replaced by the usual microduplex structure at higher annealing temperatures. The annealing texture of the L1(2)/FCC phase showed the presence of alpha-fiber (ND// < 011 > ) components while the B2 phase showed strong ND-fiber (ND// < 111 > ) components. The UCR processed material with novel heterogeneous microstructure showed much greater hardness as compared to the MSCR and TSCR(45 degrees) processed materials. The present results indicate that strain path exerted significant influence in controlling microstructure, texture and hardness properties of EHEA.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据