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Strain rate dependence on the evolution of microstructure and deformation mechanism during nanoscale deformation in low carbon-high Mn TWIP steel
Li, K.1; Yu, B.1; Misra, R. D. K.1; Han, G.2; Tsai, Y. T.3; Shao, C. W.4; Shang, C. J.2; Yang, J. R.3; Zhang, Z. F.4
Corresponding AuthorMisra, R. D. K.(dmisra2@utep.edu)
2019-01-10
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume742Pages:116-123
AbstractWe elucidate here the strain rate dependence on the deformation behavior and accompanying deformation mechanism in Fe-30Mn-0.3C TWIP steel via nanoscale deformation experiments and post-mortem microscopy of the deformed region. The nanoindentaion hardness increased with increased strain rate from 0.01 s(-1) to 1 s(-1), and exhibited a positive strain rate sensitivity of 0.095 with an activation volume of 18b(3). At a low strain rate, dislocations dominated the deformation behavior with a high density of 2.7 x 10(16) m(-2). With increased strain rate, the dislocations decreased and the stacking faults and nanotwins gradually increased. However, nanotwins with secondary twins were the dominant deformation process at high strain rate of 1 s(-1). The deformation behavior was significantly impacted by the interplay between strain rate, stacking fault energy and deformation mechanisms. A critical theoretical analysis suggested that the strain rate influenced the critical shear stress for twinning and dislocation slip, resulting in the change in deformation mechanism from dislocation slip to twinning.
KeywordEngineering steel Deformation behavior Microstructure evolution, strain rate
Funding OrganizationNational Science Foundation, USA
DOI10.1016/j.msea.2018.11.006
Indexed BySCI
Language英语
Funding ProjectNational Science Foundation, USA[MRI 153081] ; National Science Foundation, USA[DMR 160280]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000457814400013
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/131810
Collection中国科学院金属研究所
Corresponding AuthorMisra, R. D. K.
Affiliation1.Univ Texas El Paso, Dept Met Mat & Biomed Engn, Lab Excellence Adv Steels Res, 500 W Univ Ave, El Paso, TX 79968 USA
2.Univ Sci & Technol Beijing, Beijing 100083, Peoples R China
3.Natl Taiwan Univ, Dept Mat Sci & Engn, 1 Roosevelt Rd, Taipei 106, Taiwan
4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Li, K.,Yu, B.,Misra, R. D. K.,et al. Strain rate dependence on the evolution of microstructure and deformation mechanism during nanoscale deformation in low carbon-high Mn TWIP steel[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,742:116-123.
APA Li, K..,Yu, B..,Misra, R. D. K..,Han, G..,Tsai, Y. T..,...&Zhang, Z. F..(2019).Strain rate dependence on the evolution of microstructure and deformation mechanism during nanoscale deformation in low carbon-high Mn TWIP steel.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,742,116-123.
MLA Li, K.,et al."Strain rate dependence on the evolution of microstructure and deformation mechanism during nanoscale deformation in low carbon-high Mn TWIP steel".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 742(2019):116-123.
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