文章信息/Info

Title:

Progress in the Strengthening and Toughening Mechanisms of High Entropy Alloy

文章編號(hào):

1674-3962(2021)05-0384-10

作者:

馬軍; 王建忠; 敖慶波; 李燁; 吳琛; 湯慧萍

（西北有色金屬研究院 金屬多孔材料國家重點(diǎn)實(shí)驗(yàn)室, 陜西 西安 710016）

Author(s):

MA Jun;  WANG Jianzhong;  AO Qingbo;  LI Ye;  WU Chen;  TANG Huiping

（State Key Laboratory of Porous Metal Materials, Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China)

關(guān)鍵詞:

高熵合金; 高熵效應(yīng); 強(qiáng)韌化機(jī)制;  位錯(cuò); 變形

Keywords:

high entropy alloy;  high entropy effect;  strengthening and toughening mechanism;  dislocations;  deformation

分類號(hào):

TG139

DOI:

10.7502/j.issn.1674-3962.202005003

文獻(xiàn)標(biāo)志碼:

A

摘要:

高熵合金由于其獨(dú)特的多主元元素組成，具有很多超越傳統(tǒng)合金的性能，包括良好的低溫強(qiáng)韌性和高溫強(qiáng)度、結(jié)構(gòu)穩(wěn)定性等，是未來合金研發(fā)的重要方向。總結(jié)了近10年來在高熵合金強(qiáng)韌化機(jī)制方面的研究進(jìn)展，列舉了如位錯(cuò)強(qiáng)化、變形誘導(dǎo)孿晶(twin induced plasticity, TWIP)強(qiáng)化、變形誘導(dǎo)相變（transformation induced plasticity, TRIP）強(qiáng)化、細(xì)晶強(qiáng)化、沉淀強(qiáng)化、固溶強(qiáng)化等機(jī)制的典型應(yīng)用范例，分別評(píng)述了這些強(qiáng)韌化機(jī)制的潛力和局限，如前3種機(jī)制單獨(dú)應(yīng)用時(shí)強(qiáng)韌化效果有限，后3種機(jī)制提高韌性效果有限。最后探討了高熵合金強(qiáng)韌化研究的未來重點(diǎn)方向，即深入認(rèn)識(shí)影響這些機(jī)制的起源，例如層錯(cuò)能對(duì)TWIP和TRIP機(jī)制的影響；并聯(lián)合應(yīng)用多種強(qiáng)韌化機(jī)制，以達(dá)到優(yōu)異的綜合性能。

Abstract:

High entropy alloys are composed of multiple primary elements, they outperform many traditional alloys in the cryogenic toughness, high temperature strength and phase stability, and have been the focus of futural development of alloys. This paper summarized the research progress on the strengthening and toughening mechanisms of high entropy alloys in recent 10 years. The typical applications of the strengthening and toughening mechanisms such as dislocation strengthening, twin induced plasticity(TWIP), transformation induced plasticity (TRIP), fined grain strengthening, precipitation strengthening, solid solution strengthening were reviewed. The potentials and limits of these strengthening and toughening mechanisms were analyzed, for example, the first 3 mechanisms only show limited strengthening and toughening effects when used alone, and the last 3 mechanisms show limited toughening effects. The future development directions of strengthening and toughening mechanisms for high entropy alloys were discussed, for example, deeply understanding the mechanisms source and combining multiple mechanisms to achieve best comprehensive properties.