Strain rate dependence on the evolution of microstructure and deformation mechanism during nanoscale deformation in low carbon-high Mn TWIP steel

doi:10.1016/j.msea.2018.11.006

CORC > 金属研究所 > 中国科学院金属研究所

	Strain rate dependence on the evolution of microstructure and deformation mechanism during nanoscale deformation in low carbon-high Mn TWIP steel
	Li, K.3; Yu, B.3; Misra, R. D. K.3; Han, G.1; Tsai, Y. T.4; Shao, C. W.2; Shang, C. J.1; Yang, J. R.4; Zhang, Z. F.2
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2019-01-10
卷号	742 页码:116-123
关键词	Engineering steel Deformation behavior Microstructure evolution, strain rate
ISSN号	0921-5093
DOI	10.1016/j.msea.2018.11.006
通讯作者	Misra, R. D. K.(dmisra2@utep.edu)
英文摘要	We 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.
资助项目	National Science Foundation, USA[MRI 153081] ; National Science Foundation, USA[DMR 160280]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000457814400013
资助机构	National Science Foundation, USA
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/131806]
专题	金属研究所_中国科学院金属研究所
通讯作者	Misra, R. D. K.
作者单位	1.Univ Sci & Technol Beijing, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Texas El Paso, Dept Met Mat & Biomed Engn, Lab Excellence Adv Steels Res, 500 W Univ Ave, El Paso, TX 79968 USA 4.Natl Taiwan Univ, Dept Mat Sci & Engn, 1 Roosevelt Rd, Taipei 106, Taiwan
推荐引用方式 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.