Strain Rate Effect on Tensile Behavior for a High Specific Strength Steel: From Quasi-Static to Intermediate Strain Rates

doi:10.3390/met8010011

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	Strain Rate Effect on Tensile Behavior for a High Specific Strength Steel: From Quasi-Static to Intermediate Strain Rates
	Wang W(王雯); Ma Y(马彦); Yang MX(杨沐鑫); Jiang P(姜萍); Yuan FP(袁福平); Wu XL(武晓雷)
发表期刊	METALS
	2018
卷号	8 期号:1 页码:11
ISSN	2075-4701
摘要	The strain rate effect on the tensile behaviors of a high specific strength steel (HSSS) with dual-phase microstructure has been investigated. The yield strength, the ultimate strength and the tensile toughness were all observed to increase with increasing strain rates at the range of 0.0006 to 56/s, rendering this HSSS as an excellent candidate for an energy absorber in the automobile industry, since vehicle crushing often happens at intermediate strain rates. Back stress hardening has been found to play an important role for this HSSS due to load transfer and strain partitioning between two phases, and a higher strain rate could cause even higher strain partitioning in the softer austenite grains, delaying the deformation instability. Deformation twins are observed in the austenite grains at all strain rates to facilitate the uniform tensile deformation. The B2 phase (FeAl intermetallic compound) is less deformable at higher strain rates, resulting in easier brittle fracture in B2 particles, smaller dimple size and a higher density of phase interfaces in final fracture surfaces. Thus, more energy need be consumed during the final fracture for the experiments conducted at higher strain rates, resulting in better tensile toughness.
关键词	high specific strength steel strain rate effect intermediate strain rates strain partitioning deformation twins
DOI	10.3390/met8010011
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000427529100011
关键词[WOS]	DUAL-PHASE STEELS ; MECHANICAL-BEHAVIOR ; WIDE-RANGE ; TWIP STEEL ; TRIP/TWIP STEELS ; RATE SENSITIVITY ; GRAINED FE ; AL CONTENT ; DEFORMATION ; TRIP
WOS研究方向	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science ; Metallurgy & Metallurgical Engineering
项目资助者	National Key R&D Program of China [2017YFA0204402] ; NSFC [11672313, 11472286, 11572328, 51701228, 51601204] ; Chinese Academy of Sciences [XDB22040503]
论文分区	二类
力学所作者排名	1
引用统计	被引频次：43[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/311007/77887
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15,North 4th Ring,West Rd, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wang W,Ma Y,Yang MX,et al. Strain Rate Effect on Tensile Behavior for a High Specific Strength Steel: From Quasi-Static to Intermediate Strain Rates[J]. METALS,2018,8,1,:11.
APA	王雯,马彦,杨沐鑫,姜萍,袁福平,&武晓雷.(2018).Strain Rate Effect on Tensile Behavior for a High Specific Strength Steel: From Quasi-Static to Intermediate Strain Rates.METALS,8(1),11.
MLA	王雯,et al."Strain Rate Effect on Tensile Behavior for a High Specific Strength Steel: From Quasi-Static to Intermediate Strain Rates".METALS 8.1(2018):11.

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