Deformation Behavior and Toughening of High-Entropy Alloys

doi:10.11900/0412.1961.2018.00372

Acta Metall Sin

2018, Vol. 54

Issue (11): 1553-1566 DOI: 10.11900/0412.1961.2018.00372

Materials and Processes

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Deformation Behavior and Toughening of High-Entropy Alloys

Zhaoping LU(

), Zhifeng LEI, Hailong HUANG, Shaofei LIU, Fan ZHANG, Dabo DUAN, Peipei CAO, Yuan WU, Xiongjun LIU, Hui WANG

State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

Cite this article:

Zhaoping LU, Zhifeng LEI, Hailong HUANG, Shaofei LIU, Fan ZHANG, Dabo DUAN, Peipei CAO, Yuan WU, Xiongjun LIU, Hui WANG. Deformation Behavior and Toughening of High-Entropy Alloys. Acta Metall Sin, 2018, 54(11): 1553-1566.

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Abstract

A new alloy design concept, high-entropy alloys (HEAs), has attracted increasing attentions and becomes a new research highlight recently. Different from traditional alloy design strategy which usually blends with one or two elements as the principal constituent and other minor elements for the further optimization of properties, HEAs are multicomponent alloys containing several principle elements (usually ≥5) in equiatomic or near equiatomic ratio. Due to their unique atomic structure, HEAs possess a lot of distinguished properties. Since the discovery of HEAs, a variety of HEA systems have been developed and shown unique physical, chemical and thermodynamic properties, especially the promising mechanical properties such as high strength and hardness, abrasion resistance, corrosion resistance and softening resistance. Here in this short review manuscript, starting from the research challenges for understanding the deformation mechanism of HEAs, this work briefly summarized the mechanical properties and deformation behavior of HEAs, reviewed the proposed strengthening-toughening strategies and their corresponding deformation mechanism in HEAs. A brief perspective on the research directions of mechanical behavior of HEAs was also proposed.

Key words: high-entropy alloy toughening deformation behavior and mechanism

Received: 16 August 2018

ZTFLH:

TG457.19

Fund: Supported by National Natural Science Foundation of China (Nos.51671018, 51871016, 11790293, 51531001 and 51671021), Program of Introducing Talents of Discipline to University of China (No.B07003) and Fundamental Research Funds for the Central Universities (Nos.FRF-TP-18-004C1and FRF-TP-15-004C1)

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	Articles by authors
	Zhaoping LU
	Zhifeng LEI
	Hailong HUANG
	Shaofei LIU
	Fan ZHANG
	Dabo DUAN
	Peipei CAO
	Yuan WU
	Xiongjun LIU
	Hui WANG

URL:

https://www.ams.org.cn/EN/10.11900/0412.1961.2018.00372 OR https://www.ams.org.cn/EN/Y2018/V54/I11/1553

Fig.1 True tensile stress-strain curves of high-entropy alloys (HEAs) with different Ta contents (a), ultimate tensile strength and ductility of the ductilized HEAs, in comparison with other advanced alloys (b) (IF—interstitial free, TWIP—twinning induced plasticity, TRIP—transformation induced plasticity)

Fig.2 Room-temperature tensile properties of FeCoNiCr HEA with Ti and Al addition

Fig.3 Characterization of the morphology and structure of precipitate in FeCoNiCr HEA with Ti and Al addition

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