Precipitation in the equiatomic high-entropy alloy CrMnFeCoNi

EJ Pickering; R Mu??oz-Moreno; HJ Stone; NG Jones

doi:10.1016/j.scriptamat.2015.10.025

Precipitation in the equiatomic high-entropy alloy CrMnFeCoNi

EJ Pickering, R Mu??oz-Moreno, HJ Stone, NG Jones

Materials Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

CrMnFeCoNi is widely considered to be an exemplar high-entropy alloy, which is stable as a single solid-solution phase at all temperatures below its melting point. Here, for the first time, the formation of two distinct types of Cr-rich precipitate in coarse-grained CrMnFeCoNi is reported following prolonged exposures at 700 °C. The precipitates were identified as M23C6 and the σ phase, and their formation in unworked material during heat treatments without an applied stress indicated that they are equilibrium phases. Therefore, CrMnFeCoNi can no longer be regarded as thermodynamically stable as a single phase at all temperatures below its solidus.

Original language	English
Pages (from-to)	106-109
Number of pages	4
Journal	Scripta Materialia
Volume	113
DOIs	https://doi.org/10.1016/j.scriptamat.2015.10.025
Publication status	Published - 2 Nov 2015

Access to Document

10.1016/j.scriptamat.2015.10.025Licence: CC BY

Cite this

@article{fa1aca848aca49b992f29f5216514013,

title = "Precipitation in the equiatomic high-entropy alloy CrMnFeCoNi",

abstract = "CrMnFeCoNi is widely considered to be an exemplar high-entropy alloy, which is stable as a single solid-solution phase at all temperatures below its melting point. Here, for the first time, the formation of two distinct types of Cr-rich precipitate in coarse-grained CrMnFeCoNi is reported following prolonged exposures at 700 °C. The precipitates were identified as M23C6 and the σ phase, and their formation in unworked material during heat treatments without an applied stress indicated that they are equilibrium phases. Therefore, CrMnFeCoNi can no longer be regarded as thermodynamically stable as a single phase at all temperatures below its solidus.",

author = "EJ Pickering and R Mu??oz-Moreno and HJ Stone and NG Jones",

year = "2015",

month = nov,

day = "2",

doi = "10.1016/j.scriptamat.2015.10.025",

language = "English",

volume = "113",

pages = "106--109",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Precipitation in the equiatomic high-entropy alloy CrMnFeCoNi

AU - Pickering, EJ

AU - Mu??oz-Moreno, R

AU - Stone, HJ

AU - Jones, NG

PY - 2015/11/2

Y1 - 2015/11/2

N2 - CrMnFeCoNi is widely considered to be an exemplar high-entropy alloy, which is stable as a single solid-solution phase at all temperatures below its melting point. Here, for the first time, the formation of two distinct types of Cr-rich precipitate in coarse-grained CrMnFeCoNi is reported following prolonged exposures at 700 °C. The precipitates were identified as M23C6 and the σ phase, and their formation in unworked material during heat treatments without an applied stress indicated that they are equilibrium phases. Therefore, CrMnFeCoNi can no longer be regarded as thermodynamically stable as a single phase at all temperatures below its solidus.

AB - CrMnFeCoNi is widely considered to be an exemplar high-entropy alloy, which is stable as a single solid-solution phase at all temperatures below its melting point. Here, for the first time, the formation of two distinct types of Cr-rich precipitate in coarse-grained CrMnFeCoNi is reported following prolonged exposures at 700 °C. The precipitates were identified as M23C6 and the σ phase, and their formation in unworked material during heat treatments without an applied stress indicated that they are equilibrium phases. Therefore, CrMnFeCoNi can no longer be regarded as thermodynamically stable as a single phase at all temperatures below its solidus.

U2 - 10.1016/j.scriptamat.2015.10.025

DO - 10.1016/j.scriptamat.2015.10.025

M3 - Article

SN - 1359-6462

VL - 113

SP - 106

EP - 109

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Precipitation in the equiatomic high-entropy alloy CrMnFeCoNi

Abstract

Access to Document

Fingerprint

Cite this