TY - JOUR
T1 - Effect of Ta addition on solidification characteristics of CoCrFeNiTax eutectic high entropy alloys
AU - Ai, Cheng
AU - Wang, Guoxin
AU - Liu, Lin
AU - Guo, Min
AU - He, Feng
AU - Zhou, Jian
AU - Chen, Yongnan
AU - Wang, Zhijun
AU - Gan, Bin
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/5
Y1 - 2020/5
N2 - Effect of Ta addition on solidification characteristics of CoCrFeNiTax (x = 0.1–0.7) eutectic high entropy alloys were investigated. With increasing Ta content, CoCrFeNiTax alloys changed from hypoeutectic alloys with primary γ phase to eutectic alloy (x = 0.43) and to hypereutectic alloys with primary Laves phase. Consequently, Ta content in primary phase significantly increased, while the content of Ta element in γ/Laves eutectic phases slightly decreased. Meanwhile, the solidification path and solidification characteristic temperatures of CoCrFeNiTax alloys both agreed with typical binary eutectic phase diagram, and obvious microsegregation of Ta element was only found in CoCrFeNiTa0.1 alloy. Furthermore, the contents of Co, Cr, Fe and Ni elements in primary phases and distribution behaviors of Co, Cr, Fe and Ni elements were both different in CoCrFeNiTax alloys, which indicated that CoCrFeNiTax alloys cannot be simplified as (CoCrFeNi)–Ta pseudo binary system when analyzing distribution behaviors of Co, Cr, Fe and Ni elements.
AB - Effect of Ta addition on solidification characteristics of CoCrFeNiTax (x = 0.1–0.7) eutectic high entropy alloys were investigated. With increasing Ta content, CoCrFeNiTax alloys changed from hypoeutectic alloys with primary γ phase to eutectic alloy (x = 0.43) and to hypereutectic alloys with primary Laves phase. Consequently, Ta content in primary phase significantly increased, while the content of Ta element in γ/Laves eutectic phases slightly decreased. Meanwhile, the solidification path and solidification characteristic temperatures of CoCrFeNiTax alloys both agreed with typical binary eutectic phase diagram, and obvious microsegregation of Ta element was only found in CoCrFeNiTa0.1 alloy. Furthermore, the contents of Co, Cr, Fe and Ni elements in primary phases and distribution behaviors of Co, Cr, Fe and Ni elements were both different in CoCrFeNiTax alloys, which indicated that CoCrFeNiTax alloys cannot be simplified as (CoCrFeNi)–Ta pseudo binary system when analyzing distribution behaviors of Co, Cr, Fe and Ni elements.
KW - Composition characteristics of phases
KW - Distribution behaviors of elements
KW - Eutectic high entropy alloys
KW - Solidification characteristic temperatures
KW - Solidification characteristics
KW - Solidification path
UR - http://www.scopus.com/inward/record.url?scp=85081131757&partnerID=8YFLogxK
U2 - 10.1016/j.intermet.2020.106769
DO - 10.1016/j.intermet.2020.106769
M3 - 文章
AN - SCOPUS:85081131757
SN - 0966-9795
VL - 120
JO - Intermetallics
JF - Intermetallics
M1 - 106769
ER -