| 动态应变时效对奥氏体不锈钢纯弯疲劳强度的影响 |
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| 引用本文： | 陈文哲,钱匡武.动态应变时效对奥氏体不锈钢纯弯疲劳强度的影响[J].金属学报,1989,25(2):56-60. |
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| 作者姓名： | 陈文哲 钱匡武 |
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| 作者单位： | 福州大学机械系 讲师(陈文哲)，福州大学 福州市(钱匡武) |
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| 摘 要： | 本文着重研究了动态应变时效(DSA)预处理对18-8型奥氏体不锈钢室温纯弯疲劳强度的影响。结果表明,DSA预处理显著提高材料纯弯疲劳强度,其强化效果随预应变温度和预应变量的增加而提高,其疲劳极限比固溶态提高87％,比相应的冷变形态提高20％。金属薄膜电镜观察结果表明,材料经DSA预处理后,形成了均匀、高密度、稳定的位错网络结构。在随后的疲劳过程中,它们有效地抑制了疲劳裂纹的萌生和扩展。
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| 关 键 词： | 不锈钢 疲劳强度 弯曲 应变时效 |
| 收稿时间： | 1989-02-18 |
| 修稿时间： | 1989-02-18 |
EFFECTS OF DYNAMIC STRAIN AGING ON PURE BENDING FATIGUE STRENGTH OF AUSTENITIC STAINLESS STEEL |
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| CHEN Wenzhe,QIAN Kuangwu Fuzhou University.EFFECTS OF DYNAMIC STRAIN AGING ON PURE BENDING FATIGUE STRENGTH OF AUSTENITIC STAINLESS STEEL[J].Acta Metallurgica Sinica,1989,25(2):56-60. |
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| Authors: | CHEN Wenzhe QIAN Kuangwu Fuzhou University |
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| Affiliation: | CHEN Wenzhe;QIAN Kuangwu Fuzhou University |
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| Abstract: | DSA pre-treatment processes increase remarkably the fatigue strengthand the strenthening effects increase with increasing prestrain temperature and pre-strain. TBM observation shows that the uniform and stable dislocation networkswith high density form after DSA pre-treatment, which suppress effectively the in-ititation and propagation of fatigue crack and increase the fatigue strength. |
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| Keywords: | dynamic strain aging (DSA) austenitic stainless steel fatigue strength |
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