Impact of interstitial carbon on self-diffusion in CoCrFeMnNi high entropy alloys

被引：35
作者：
Lukianova, O. A. [1 ]
Rao, Z. [2 ]
Kulitckii, V. [1 ]
Li, Z. [2 ,3 ]
Wilde, G. [1 ]
Divinski, S. V. [1 ]
机构：
[1] Univ Munster, Inst Mat Phys, Munster, Germany
[2] Max Planck Inst Eisenforsch GmbH, Dusseldorf, Germany
[3] Cent South Univ, Sch Mat Sci & Engn, Changsha, Peoples R China
来源：
SCRIPTA MATERIALIA | 2020年 / 188卷
基金：
美国国家科学基金会;
关键词：
Tracer diffusion; High-entropy alloy; Carbon solubility; MECHANICAL-PROPERTIES; TRACER DIFFUSION; GRAIN-BOUNDARY; NI; MICROSTRUCTURE; CHROMIUM; IRON;
D O I：
10.1016/j.scriptamat.2020.07.044
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Tracer diffusion of the matrix elements in CoCrFeNiMn-based high-entropy alloys with 0.2, 0.5 and 0.8 at.% carbon is measured at 1373 K. The diffusion coefficients are found to depend non-monotonously on the carbon content. The diffusion retardation in low-C alloys is discussed in terms of the impact of interstitially-dissolved carbon on the vacancy concentration and the migration barriers in the alloy. In high-C alloys, formation of carbides alternates the observed trends, most probably by increasing the total vacancy concentration. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：264 / 268
页数：5
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