Weak boundary enabled tensile ductility in dealloyed porous Fe alloy

doi:10.1016/j.actamat.2022.118501

IMR OpenIR

	Weak boundary enabled tensile ductility in dealloyed porous Fe alloy
	Xie, Hui; Shao, Jun-Chao; Zou, Lijie; Jin, Hai-Jun
通讯作者	Jin, Hai-Jun(hjjin@imr.ac.cn)
	2023-01-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	243 页码:11
摘要	Dealloying has emerged as a new route to the synthesis of porous or nanoporous materials for a variety of novel structural/functional applications. However, dealloyed (nano-)porous metals are notoriously brit-tle and often fracture catastrophically in bending or tension, which is detrimental to their applications. In this paper, we report that under tension, the irreversible fracture strain (epsilon i) of a macroscopic porous Fe(MnCr) alloy prepared by liquid metal dealloying can be enhanced from nearly zero to 4.1 % by in-troducing weak domain boundaries, while previous samples with homogeneous (nano-)porous structure usually fracture at epsilon i below 1.0 % . Tensile ductility is enhanced only if the mean domain size ( D ) is not too much larger than mean ligament diameter ( L ), evidenced by the dramatic increase in epsilon i as D/L de-creases from-24 to-7. The "ductile" deformation of these materials is associated with the diffuse failure under tension, arising from the promoted nucleation of micro-cracks and the crack deflection or branch-ing along weak domain boundaries at lower D / L . This strategy might also apply to other (nano-)porous materials self-organized in dealloying or fabricated by other methods.(c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Dealloying Porous or nanoporous materials Tensile ductility Weak boundaries Micro-cracks
资助者	National Natural Science Founda- tion of China
DOI	10.1016/j.actamat.2022.118501
收录类别	SCI
语种	英语
资助项目	National Natural Science Founda- tion of China ; [52101204] ; [51971218]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000900016800008
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/175765
专题	中国科学院金属研究所
通讯作者	Jin, Hai-Jun
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Xie, Hui,Shao, Jun-Chao,Zou, Lijie,et al. Weak boundary enabled tensile ductility in dealloyed porous Fe alloy[J]. ACTA MATERIALIA,2023,243:11.
APA	Xie, Hui,Shao, Jun-Chao,Zou, Lijie,&Jin, Hai-Jun.(2023).Weak boundary enabled tensile ductility in dealloyed porous Fe alloy.ACTA MATERIALIA,243,11.
MLA	Xie, Hui,et al."Weak boundary enabled tensile ductility in dealloyed porous Fe alloy".ACTA MATERIALIA 243(2023):11.