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A remarkable improvement of low-cycle fatigue resistance of high-Mn austenitic TWIP alloys with similar tensile properties: Importance of slip mode
Shao, CW; Zhang, P; Liu, R; Zhang, ZJ; Pang, JC; Duan, QQ; Zhang, ZF; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Peoples R China.
2016-10-01
发表期刊ACTA MATERIALIA
ISSN1359-6454
卷号118页码:196-212
摘要The low-cycle fatigue (including extremely-low-cycle fatigue) behaviors of the Fe-Mn-C TWIP steels are comprehensively investigated focusing on the effects of the imposed strain amplitude and Mn content on the deformation and damage characteristics. It is found that fatigue performance varies obviously with increasing Mn content, though their tensile properties do not change much. With the increase of strain amplitude or Mn content, the dislocation slip mode changes from planar slip to wavy slip. In order to evaluate the low-cycle fatigue properties, more impartial and reasonable, a hysteresis energy-based fatigue life prediction model is applied and developed. According to the experimental results and model analysis, unlike tensile properties, the low-cycle fatigue performance of the TWIP steel is extremely sensitive to their slip mode. A remarkable improvement of fatigue resistance is found to be related to the increase of Mn content, which may originate from the relatively low damage accumulation rate of planar slip. Specifically, planar slip caused by lowering the stacking fault energy is much more uniformly distributed than which caused by disordering short-range order. Such a variation in fatigue damage micromechanisms is believed to be the major reason for the occurrence of a special bilinear relationship for the Coffin-Manson curve. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属[shao, c. w. ; zhang, p. ; liu, r. ; zhang, z. j. ; pang, j. c. ; duan, q. q. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang, peoples r china
关键词High-mn Twip Steels Low-cycle Fatigue Hysteresis Energy Life Prediction Slip Mode
学科领域Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者National Natural Science Foundation of China (NSFC) [51301179, 51331107]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/76252
专题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, Peoples R China.
推荐引用方式
GB/T 7714
Shao, CW,Zhang, P,Liu, R,et al. A remarkable improvement of low-cycle fatigue resistance of high-Mn austenitic TWIP alloys with similar tensile properties: Importance of slip mode[J]. ACTA MATERIALIA,2016,118:196-212.
APA Shao, CW.,Zhang, P.,Liu, R.,Zhang, ZJ.,Pang, JC.,...&Zhang, ZF .(2016).A remarkable improvement of low-cycle fatigue resistance of high-Mn austenitic TWIP alloys with similar tensile properties: Importance of slip mode.ACTA MATERIALIA,118,196-212.
MLA Shao, CW,et al."A remarkable improvement of low-cycle fatigue resistance of high-Mn austenitic TWIP alloys with similar tensile properties: Importance of slip mode".ACTA MATERIALIA 118(2016):196-212.
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