| 表面层亚结构和残余应力对不锈钢和低碳钢疲劳强度的影响 |
| |
| 引用本文： | 谈育煦,任立平,李刚.表面层亚结构和残余应力对不锈钢和低碳钢疲劳强度的影响[J].金属学报,1989,25(5):59-64. |
| |
| 作者姓名： | 谈育煦 任立平 李刚 |
| |
| 作者单位： | 西安交通大学金属材料及强度研究所，西安交通大学，西安交通大学 副教授，西安(710049) |
| |
| 摘 要： | 透射电镜分析结果表明,不锈钢表面强化层内存在大量显微变形孪晶。变形孪晶不仅起到了组织强化的作用,而且还可防止表面残余应力在疲劳过程中逐渐衰减,使不锈钢弯曲疲劳强度维待在较高的水平。低碳钢表面强化层中的胞状位错组态在疲劳过程中稳定性较差,不能阻止表面残余应力的松弛,因此表面机械强化不能提高低碳钢的弯曲疲劳强度。
|
| 关 键 词： | 亚结构 残余应力 不锈钢 疲劳强度 |
| 收稿时间： | 1989-05-18 |
| 修稿时间： | 1989-05-18 |
EFFECT OF SUBSTRUCTURE AND RESIDUAL STRESS IN STRENGTHENED LAYER ON FATIGUE STRENGTH OF STAINLESS STEEL OR LOW CARBON STEEL |
| |
| TAN Yuxu,REN Liping,LI Gang Xi'an Jiaotong University TAN Yuxu,Associate professor.EFFECT OF SUBSTRUCTURE AND RESIDUAL STRESS IN STRENGTHENED LAYER ON FATIGUE STRENGTH OF STAINLESS STEEL OR LOW CARBON STEEL[J].Acta Metallurgica Sinica,1989,25(5):59-64. |
| |
| Authors: | TAN Yuxu REN Liping LI Gang Xi'an Jiaotong University TAN Yuxu Associate professor |
| |
| Affiliation: | TAN Yuxu,REN Liping,LI Gang Xi'an Jiaotong University TAN Yuxu,Associate professor,Institute of Metallic Materials and Strength,Xi'an Jiaotong University,Xi'an |
| |
| Abstract: | In the strengthened surface layer of stainless steel after shot peening,there are a great amount of deformation microtwins, which may act as structuralstrengthening and prevent the gradual relexation of surface residual stress duringfatigue, so as to keep its rather high level of bending fatigue strength. However,in the strengthened surface layer of low carbon steel, dislocation cell structure isso unstable during fatigue that its surface residual stress relexation cannot be retard-ed. Therefore, the bending fatigue strength of the low carbon steel does not beimproved by shot peening. |
| |
| Keywords: | substructure residual stress fatigue strength |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《金属学报》浏览原始摘要信息 |
|
点击此处可从《金属学报》下载全文 |
|
