Friction stress and Hall-Petch relationship in CoCrNi equi-atomic medium entropy alloy processed by severe plastic deformation and subsequent annealing
Friction stress and Hall-Petch relationship in CoCrNi equi-atomic medium entropy alloy processed by severe plastic deformation and subsequent annealing
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DOI：
10.1016/j.scriptamat.2017.02.042
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发表时间：
2017-06-01
影响因子：
6
通讯作者：
Tsuji, Nobuhiro
中科院分区：
文献类型：
--
作者：
Yoshida, Shuhei;Bhattacharjee, Tilak;Tsuji, Nobuhiro
The present work focuses on the friction stress and the Hall-Petch relationship in CoCrNi equi-atomic medium entropy alloy (MEA). The CoCrNi equi-atomic MEA and a Ni-40Co alloy were processed by high-pressure torsion and subsequent annealing. The specimens with fully-recrystallized microstructure with different grain sizes ranging from 199 nm to 111 mu m were obtained. The Hall-Petch plot of the yield strength of the present specimens indicated that the friction stress of the CoCrNi MEA was much higher than Ni-40Co and pure metals, suggesting that the local lattice distortion in the equi-atomic alloy played an important role for the dislocation activity. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
