Strain hardenability of a gradient metallic alloy under high-strain-rate compressive loading

doi:10.1016/j.matdes.2019.107695

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	Strain hardenability of a gradient metallic alloy under high-strain-rate compressive loading
	Fan JT 1; Jiang MQ(蒋敏强)2
通讯作者	Fan, Jitang([email protected])
发表期刊	MATERIALS & DESIGN
	2019-05-15
卷号	170 页码:8
ISSN	0264-1275
摘要	Subjected to an impact loading, metallic alloys usually display strain softening due to the highly localized shear deformation accompanied by temperature rise, which causes the decrease of resistance to an applied loading and even catastrophic failure. In this work, strain hardening under high-rate compressive loading is firstly achieved in a developed metallic alloy with the gradient microstructure of both phases and grain sizes. Mechanical responses at different compressive loading rates all show a unique strain hardening. Rate dependencies of yielding and strain hardening are revealed and illustrated by a modified Johnson-Cook constitutive model. Dynamic deformation and fracture are characterized as macroscopic shear with the shielded cracks. The inherent toughening mechanisms are indicated as gradient straining with phase transformation, twinning and dislocation tangling. This work demonstrates that the highly localized shear deformation accompanied by temperature rise can be prevented by the gradient microstructure with martensitic transformations, twinnings and dislocations. It is full of interest to create a feasible route of developing the strain hardenable metallic alloys under impact loadings via architecturing the gradient microstructure. (C) 2019 The Authors. Published by Elsevier Ltd.
关键词	Metallic alloy Gradient microstructure design Impact loading Strain hardening Rate dependency Dynamic fracture
DOI	10.1016/j.matdes.2019.107695
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000462900600004
关键词[WOS]	MECHANICAL-BEHAVIOR ; GLASS COMPOSITES ; CUZR MARTENSITE ; STRENGTH ; FRACTURE ; STEEL ; DEFORMATION ; PLASTICITY ; IMPACT ; DAMAGE
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
资助项目	Beijing Institute of Technology Research Fund Program for Young Scholars, China ; Independent Research Project of State Key Laboratory of Explosion Science and Technology, China[QNKT17-03] ; Fundamental Research Funds for the Central Universities, China ; National Natural Science Foundation of China, China[11602024]
项目资助者	Beijing Institute of Technology Research Fund Program for Young Scholars, China ; Independent Research Project of State Key Laboratory of Explosion Science and Technology, China ; Fundamental Research Funds for the Central Universities, China ; National Natural Science Foundation of China, China
论文分区	二类/Q1
力学所作者排名	2
RpAuthor	Fan, Jitang
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/78934
专题	非线性力学国家重点实验室
作者单位	1.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China; 2.Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Fan JT,Jiang MQ. Strain hardenability of a gradient metallic alloy under high-strain-rate compressive loading[J]. MATERIALS & DESIGN,2019,170:8.Rp_Au:Fan, Jitang
APA	Fan JT,&蒋敏强.(2019).Strain hardenability of a gradient metallic alloy under high-strain-rate compressive loading.MATERIALS & DESIGN,170,8.
MLA	Fan JT,et al."Strain hardenability of a gradient metallic alloy under high-strain-rate compressive loading".MATERIALS & DESIGN 170(2019):8.

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