| 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 Author | Misra, R. D. K.(dmisra2@utep.edu) |
| 2019-01-10 | |
| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| ISSN | 0921-5093 |
| Volume | 742Pages:116-123 |
| Abstract | 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. |
| Keyword | Engineering steel Deformation behavior Microstructure evolution, strain rate |
| Funding Organization | National Science Foundation, USA |
| DOI | 10.1016/j.msea.2018.11.006 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Science Foundation, USA[MRI 153081] ; National Science Foundation, USA[DMR 160280] |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000457814400013 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/131807 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Misra, R. D. K. |
| Affiliation | 1.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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