Improvement of low-cycle fatigue resistance in TWIP steel by regulating the grain size and distribution
文献类型：期刊论文
| 作者 | Shao, C. W.; Zhang, P.; Zhu, Y. K.; Zhang, Z. J.; Pang, J. C.; Zhang, Z. F.; Zhang, P; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China. |
| 刊名 | PERGAMON-ELSEVIER SCIENCE LTD
 |
| 出版日期 | 2017-08-01 |
| 卷号 | 134页码:128-142 |
| ISSN号 | 1359-6454 |
| 关键词 | High-mn Twip Steels Grain Size Gradient Structure Life Improvement Fatigue Damage Mechanism |
| 英文摘要 | Compared to stress controlled high-cycle fatigue, enhancing strain controlled low-cycle fatigue (LCF) properties of material is much more difficult and less reported. In this study, we introduced two strategies and technologies to improve the LCF performance of Fe-Mn-C twinning induced plasticity (TWIP) steel. One is grain refining without introducing residual stress by traditional cold rolling and following recrystallization annealing (FG sample); the other is to introduce a linear gradient in grain size into TWIP steel by the original processing technology (GS sample). It is found that GS samples exhibit a higher cyclic hardening ability and cyclic saturation stress than that of as-received coarse grain (CG) samples and FG samples, which invalids the rule of mixture. Based on the dependence of the fatigue life (N-f) on the total strain amplitude (Delta epsilon/2), GS shows the longest life at high strain amplitudes, while FG shows the longest life at low strain amplitudes. Judging from the aspect of stress (Delta sigma/2-N-f curve), i.e. the Basquin curve, GS exhibits a better LCF performance than both FG and CG. The excellent fatigue properties of GS are believed to originate from the large generation of geometrically necessary dislocations (GNDs) and the formation of hard core and soft shell structure during cyclic loading. The significant influences of grain size and distribution on fatigue damage mechanisms may provide new and important implications for the optimized microstructural design of the high fatigue performance material. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; Compared to stress controlled high-cycle fatigue, enhancing strain controlled low-cycle fatigue (LCF) properties of material is much more difficult and less reported. In this study, we introduced two strategies and technologies to improve the LCF performance of Fe-Mn-C twinning induced plasticity (TWIP) steel. One is grain refining without introducing residual stress by traditional cold rolling and following recrystallization annealing (FG sample); the other is to introduce a linear gradient in grain size into TWIP steel by the original processing technology (GS sample). It is found that GS samples exhibit a higher cyclic hardening ability and cyclic saturation stress than that of as-received coarse grain (CG) samples and FG samples, which invalids the rule of mixture. Based on the dependence of the fatigue life (N-f) on the total strain amplitude (Delta epsilon/2), GS shows the longest life at high strain amplitudes, while FG shows the longest life at low strain amplitudes. Judging from the aspect of stress (Delta sigma/2-N-f curve), i.e. the Basquin curve, GS exhibits a better LCF performance than both FG and CG. The excellent fatigue properties of GS are believed to originate from the large generation of geometrically necessary dislocations (GNDs) and the formation of hard core and soft shell structure during cyclic loading. The significant influences of grain size and distribution on fatigue damage mechanisms may provide new and important implications for the optimized microstructural design of the high fatigue performance material. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 学科主题 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 资助机构 | National Natural Science Foundation of China (NSFC) [51301179, 51331007, 51501198, U1664253]; foundation of Shenyang National Laboratory for Materials Science [2017FP24, 2017RP31] |
| 公开日期 | 2018-01-10 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79168]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang, P; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Shao, C. W.,Zhang, P.,Zhu, Y. K.,et al. Improvement of low-cycle fatigue resistance in TWIP steel by regulating the grain size and distribution[J]. PERGAMON-ELSEVIER SCIENCE LTD,2017,134:128-142. |
| APA | Shao, C. W..,Zhang, P..,Zhu, Y. K..,Zhang, Z. J..,Pang, J. C..,...&Zhang, ZF .(2017).Improvement of low-cycle fatigue resistance in TWIP steel by regulating the grain size and distribution.PERGAMON-ELSEVIER SCIENCE LTD,134,128-142. |
| MLA | Shao, C. W.,et al."Improvement of low-cycle fatigue resistance in TWIP steel by regulating the grain size and distribution".PERGAMON-ELSEVIER SCIENCE LTD 134(2017):128-142. |
入库方式： OAI收割
来源：金属研究所
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