Deformation mechanisms in a novel multiscale hetero-structured Mg alloy with high strength-ductility synergy

材料科学 极限抗拉强度 电子背散射衍射 复合材料 合金 变形(气象学) 延展性(地球科学) 应变硬化指数 可塑性 微观结构 蠕动
作者
Tong Wang,Min Zha,Yipeng Gao,Siqing Wang,Hai-Long Jia,Cheng Wang,Hui‐Yuan Wang
出处
期刊:International Journal of Plasticity [Elsevier BV]
卷期号:170: 103766-103766 被引量:32
标识
DOI:10.1016/j.ijplas.2023.103766
摘要

Most of the high-strength Mg alloys exhibit poor ductility at room temperature. Architecturing appropriate heterostructure in metallic materials gives rise to the breakthrough of the inherent strength-ductility trade-off dilemma. Here, we prepared a novel multiscale hetero-structure in Mg-9Al-1 Zn (AZ91) alloy, consisting of bimodal-structured center-region and fine-grained surface-layer, providing high strength and high ductility, i.e. yield strength of ∼303 MPa, tensile strength of ∼400 MPa, and elongation of ∼14.5 %. The multiscale microstructural heterogeneities were induced via a simple rolling process that combines the advantages of both accumulative rolling bonding (ARB) and hard plate rolling (HPR). By utilizing quasi-in-situ electron backscattered diffraction (EBSD)-digital image correlation (DIC) characterizations combined with the determination of dislocation/disclination distributions, it has been found that diversified strain accommodation mechanisms are stimulated by the strain incompatibilities near hetero-interfaces in the multiscale hetero-structure. In particular, non-basal slips have been activated largely in both the bimodal-structured center-region and fine-grained surface-layer. Moreover, a unique slip trace distribution has been observed in the fine grains adjacent to the basal-oriented coarse grain. Such a strain accommodation can better coordinate local strain incompatibility among the hetero-interface. The uniaxial loading–unloading–reloading tensile loop tests demonstrate that the multiscale heterogeneities impart a pronounced hetero-deformation induced hardening during tensile deformation. Multiple deformation modes, including the non-Schmid and non-basal slips, have been activated substantially in the multiscale hetero-structured Mg alloy, effectively relaxing local stress concentration and achieving stable plastic flow at a high-stress state, which is beneficial to improving strain-hardening ability and strength-ductility synergy. Our work could shed light on designing and processing strong and ductile Mg alloys, by tailoring proper microstructural heterogeneity to activate cooperated accommodating deformation modes.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
LaTeXer应助单纯血茗采纳,获得50
1秒前
善良天抒完成签到 ,获得积分10
4秒前
鲸落发布了新的文献求助30
7秒前
葳葳完成签到,获得积分10
9秒前
sl发布了新的文献求助10
12秒前
12秒前
sanqian911完成签到,获得积分10
13秒前
昏睡的蟠桃应助liars采纳,获得150
14秒前
斯文败类应助荒野风采纳,获得10
14秒前
14秒前
hrzmlily完成签到,获得积分10
16秒前
顽主完成签到,获得积分10
17秒前
义气访曼完成签到 ,获得积分10
18秒前
时尚战斗机完成签到,获得积分10
18秒前
20秒前
亦玉完成签到,获得积分10
20秒前
Philadelphus完成签到,获得积分20
22秒前
22秒前
wsh完成签到 ,获得积分10
23秒前
luyue9406完成签到,获得积分10
23秒前
luochen完成签到,获得积分10
23秒前
酷波er应助奶黄包采纳,获得10
24秒前
ROMANTIC完成签到 ,获得积分10
24秒前
Hancock完成签到 ,获得积分10
25秒前
luyue9406发布了新的文献求助10
26秒前
Akim应助小王采纳,获得10
26秒前
甜蜜的楷瑞应助zqfxc采纳,获得10
28秒前
Hello应助花雨落123采纳,获得10
30秒前
31秒前
32秒前
柚仝完成签到 ,获得积分10
32秒前
贾明灵完成签到,获得积分10
32秒前
未来学术司马懿应助LIUYONG采纳,获得10
33秒前
Dops完成签到,获得积分10
35秒前
票子发布了新的文献求助10
36秒前
晚风完成签到 ,获得积分10
36秒前
坚强莺发布了新的文献求助10
36秒前
无奈曼云完成签到,获得积分10
37秒前
不会吹口哨完成签到,获得积分10
37秒前
易槐完成签到,获得积分10
38秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038426
求助须知:如何正确求助?哪些是违规求助? 3576119
关于积分的说明 11374556
捐赠科研通 3305834
什么是DOI,文献DOI怎么找? 1819339
邀请新用户注册赠送积分活动 892678
科研通“疑难数据库(出版商)”最低求助积分说明 815029