分别采用精磨和冲击加工在10Ni5CrMoV钢试样表面形成不同的残余压应力,对具有不同表面压应力的试样进行高周和低周疲劳试验,采用扫描电子显微镜对疲劳断口进行分析,并测试经不同周次高应变幅循环加载后的试样表面应力.结果表明,较高的表面压应力能有效抑制小应力幅下疲劳裂纹在表面的起裂,从而有效的提高了高周疲劳性能;在高应变幅作用下,初始的表面压应力迅速发生松弛而失去对疲劳裂纹在表面起裂的抑制作用,因而对低周疲劳性能无明显影响.
参考文献
| [1] | P. J. Haagensen .FATIGUE IMPROVEMENT TECHNIQUES ADVANTAGES AND LIMITATIONS[J].Welding in the World: Journal of the International Institute of Welding: Journal of the International Institute of Welding,2003(7 Suppl.):43-63. |
| [2] | Xiaohua Cheng;John W. Fisher;Henry J. Prask .Residual stress modification by post-weld treatment and its beneficial effect on fatigue strength of welded structures[J].International Journal of Fatigue,2003(9/11):1259-1269. |
| [3] | Byeongchoon Goo;Jaehoon Kim;Jungwon Seo;Changsung Seok .A Study on the Effect of Welding Residual Stress and Weld Bead Profiles on Fatigue Behavior[J].Key engineering materials,2004(3):2302-2307. |
| [4] | Efim Statnikov .Physics and mechanism of ultrasonic impact treatment[Z].IIW Document XIII-2004～04 |
| [5] | Kab-Soo Kyung;Seung-Yong Lee;Sung-Geun Lee;Kwang-Seok Kim .Evaluation of Fatigue Strength of Fillet Welded Connections with respect to Different Post-Weld Treatment Methods[J].Key engineering materials,2007(348/349):921-924. |
| [6] | Statnikov E S;Muktepavel V O;Trufyakov V I et al.Efficiency Evaluation of ultrasonic impact treatment (UIT) of welded joints in weldox 420 steel in accordance with the IIW program[Z].IIW/IIS-Document XIII-1817～00 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%