IMECH-IR  > 非线性力学国家重点实验室
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)
Source PublicationMETALS
2018
Volume8Issue:1Pages:11
ISSN2075-4701
AbstractThe 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.
Keywordhigh specific strength steel strain rate effect intermediate strain rates strain partitioning deformation twins
DOI10.3390/met8010011
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000427529100011
WOS KeywordDUAL-PHASE STEELS ; MECHANICAL-BEHAVIOR ; WIDE-RANGE ; TWIP STEEL ; TRIP/TWIP STEELS ; RATE SENSITIVITY ; GRAINED FE ; AL CONTENT ; DEFORMATION ; TRIP
WOS Research AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Key R&D Program of China [2017YFA0204402] ; NSFC [11672313, 11472286, 11572328, 51701228, 51601204] ; Chinese Academy of Sciences [XDB22040503]
Classification二类
Ranking1
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77887
Collection非线性力学国家重点实验室
Affiliation1.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
Recommended Citation
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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