TY - JOUR
T1 - Atomic-scale homogenization in an fcc-based high-entropy alloy via severe plastic deformation
AU - Yuan, Hao
AU - Tsai, Ming Hung
AU - Sha, Gang
AU - Liu, Fan
AU - Horita, Zenji
AU - Zhu, Yuntian
AU - Wang, Jing Tao
N1 - Funding Information:
This work was supported by MOST, China (Grant No. 2012CB932203 ) and NSFC, China (Grant No. 51171080 ). The work of Z.H. was supported by a Grant-in-Aid for Scientific Research (S) from MEXT, Japan (Grant No. 26220909 ). The HPT process was carried out in the International Research Center on Giant Straining for Advanced Materials (IRC-GSAM) at Kyushu University.
PY - 2016/11/25
Y1 - 2016/11/25
N2 - The atomic-scale homogenization of a face-centered-cubic-based high-entropy alloy (HEA), Al0.3Cu0.5CoCrFeNi, using severe plastic deformation (SPD) is reported. Atom probe tomography revealed that water quenching from high temperature cannot produce a homogeneous single phase, and clustering of Cu, Al and Ni still exists. Subsequent processing by high-pressure torsion produced nanostructured non-equilibrium single phase with homogeneous elemental distribution at atomic scale. Importantly, such a non-equilibrium single phase is stable at room temperature due to the sluggish diffusion kinetics. These observations suggest that SPD is an effective approach for producing single-phase HEAs for fundamental studies and applications.
AB - The atomic-scale homogenization of a face-centered-cubic-based high-entropy alloy (HEA), Al0.3Cu0.5CoCrFeNi, using severe plastic deformation (SPD) is reported. Atom probe tomography revealed that water quenching from high temperature cannot produce a homogeneous single phase, and clustering of Cu, Al and Ni still exists. Subsequent processing by high-pressure torsion produced nanostructured non-equilibrium single phase with homogeneous elemental distribution at atomic scale. Importantly, such a non-equilibrium single phase is stable at room temperature due to the sluggish diffusion kinetics. These observations suggest that SPD is an effective approach for producing single-phase HEAs for fundamental studies and applications.
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U2 - 10.1016/j.jallcom.2016.05.337
DO - 10.1016/j.jallcom.2016.05.337
M3 - Article
AN - SCOPUS:84974555708
SN - 0925-8388
VL - 686
SP - 15
EP - 23
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -