Composition Dependence of Phase Stability, Deformation Mechanisms, and Mechanical Properties of the CoCrFeMnNi High-Entropy Alloy System

被引：160

作者：

Tasan, C. C. ^{[1
]}

Deng, Y. ^{[1
]}

Pradeep, K. G. ^{[1
,2
]}

Yao, M. J. ^{[1
]}

Springer, H. ^{[1
]}

Raabe, D. ^{[1
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

[2] Rhein Westfal TH Aachen, D-52074 Aachen, Germany

来源：

JOM | 2014年 / 66卷 / 10期

关键词：

SOLID-SOLUTION PHASE; GRAIN-GROWTH; DESIGN; MN;

D O I：

10.1007/s11837-014-1133-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The proposal of configurational entropy maximization to produce massive solid-solution (SS)-strengthened, single-phase high-entropy alloy (HEA) systems has gained much scientific interest. Although most of this interest focuses on the basic role of configurational entropy in SS formability, setting future research directions also requires the overall property benefits of massive SS strengthening to be carefully investigated. To this end, taking the most promising CoCrFeMnNi HEA system as the starting point, we investigate SS formability, deformation mechanisms, and the achievable mechanical property ranges of different compositions and microstructural states. A comparative assessment of the results with respect to room temperature behavior of binary Fe-Mn alloys reveals only limited benefits of massive SS formation. Nevertheless, the results also clarify that the compositional requirements in this alloy system to stabilize the face-centered cubic (fcc) SS are sufficiently relaxed to allow considering nonequiatomic compositions and exploring improved strength-ductility combinations at reduced alloying costs.

引用

页码：1993 / 2001

页数：9

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