Laser shock peening strengthens additively manufactured high-entropy alloy through novel surface grain rotation | |
Bai YJ(白云建); Lyu, GuoJian; Wang YJ(王云江); Chen TY(陈天宇); Zhang K(张坤); Wei BC(魏炳忱) | |
刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING |
2023-04 | |
卷号 | 871页码:144886 |
关键词 | High -entropy alloy Additive manufacturing Laser shock peening Grain refinement Dislocation slip |
ISSN号 | 0921-5093 |
DOI | 10.1016/j.msea.2023.144886 |
英文摘要 | Additive manufacturing has flourished as an advanced technique to process metals and alloys. However, this strategy usually introduces undesired defects that deteriorates the mechanical performance of structural materials. Herein laser shock peening (LSP) is proposed as an efficient strengthening approach to reshape the surface morphology of a prototypical dual-phase AlCoCrFeNi high-entropy alloy (HEA) after additive manufacturing, in which remarkable strengthening is achieved. Combined electron back scatter diffraction and transmission electron microscope characterizations reveal that the mechanical enhancement is attributed to the grain refinement and accumulation of dislocations at the impact surface. In extreme condition of LSP, the grain refinement is not accommodated by the conventional dynamic recrystallization anymore, but a novel mechanism of parental columnar grain rotation which can be rationalized by a continuum-level theory from a geometrical perspective. The new mechanism is verified by large-scale atomistic simulations which further recognizes the critical role of multiple unstable dislocation slip and amorphization in formation of smaller grains under shock. Our strategy offers a promising pathway toward polishing morphology of HEAs and thus, prohibiting the potential intrinsic defected induced-mechanical degradation of the additively manufactured metals and alloys via novel microscopic mechanism. |
分类号 | 一类 |
WOS研究方向 | WOS:000995820700001 |
语种 | 英语 |
资助机构 | National Natural Science Foundation of China [12272392, 11790292] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040303] ; Innovation Program [237099000000170004] ; NSFC [12072344] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences |
其他责任者 | Zhang, K ; Wei, BC |
内容类型 | 期刊论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/92244] |
专题 | 力学研究所_非线性力学国家重点实验室 |
作者单位 | 1.(Wei Bingchen) Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing 100049 Peoples R China 2.(Wang Yun-Jiang, Zhang Kun, Wei Bingchen) Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China 3.(Lyu Guo-Jian, Wang Yun-Jiang) Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China 4.(Bai Yunjian, Chen Tianyu, Zhang Kun, Wei Bingchen) Chinese Acad Sci Inst Mech Key Lab Micrograv Natl Micrograv Lab Beijing 100190 Peoples R China |
推荐引用方式 GB/T 7714 | Bai YJ,Lyu, GuoJian,Wang YJ,et al. Laser shock peening strengthens additively manufactured high-entropy alloy through novel surface grain rotation[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,871:144886. |
APA | 白云建,Lyu, GuoJian,王云江,陈天宇,张坤,&魏炳忱.(2023).Laser shock peening strengthens additively manufactured high-entropy alloy through novel surface grain rotation.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,871,144886. |
MLA | 白云建,et al."Laser shock peening strengthens additively manufactured high-entropy alloy through novel surface grain rotation".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 871(2023):144886. |
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