Effect of Ta addition on solidification characteristics of CoCrFeNiTax eutectic high entropy alloys

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Cheng Ai
  • Guoxin Wang
  • Lin Liu
  • Min Guo
  • Feng He
  • Jian Zhou
  • Yongnan Chen
  • Bin Gan

Detail(s)

Original languageEnglish
Article number106769
Journal / PublicationIntermetallics
Volume120
Online published12 Mar 2020
Publication statusPublished - May 2020

Abstract

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.

Research Area(s)

  • Composition characteristics of phases, Distribution behaviors of elements, Eutectic high entropy alloys, Solidification characteristic temperatures, Solidification characteristics, Solidification path

Citation Format(s)

Effect of Ta addition on solidification characteristics of CoCrFeNiTax eutectic high entropy alloys. / Ai, Cheng; Wang, Guoxin; Liu, Lin; Guo, Min; He, Feng; Zhou, Jian; Chen, Yongnan; Wang, Zhijun; Gan, Bin.

In: Intermetallics, Vol. 120, 106769, 05.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review