研究AZ31镁合金不同方向的力学性能、疲劳裂纹扩展行为和单峰过载效应以及载荷比对疲劳裂纹扩展速率的影响.结果表明:不同方向材料的抗拉强度相当,而屈服强度差别较大;不同方向疲劳裂纹扩展行为存在差异,是由于屈服强度不同所致,归一化后差别消失;当应力强度因子范围相同时,疲劳裂纹扩展速率随载荷比的降低而降低;单峰过载时,疲劳裂纹向前扩展一段距离并偏离原扩展方向,导致随后裂纹扩展迟滞,这是由于过载增大残余压应力和裂纹出现偏折的结果.
参考文献
| [1] | SURESH S;王中光;李守新;臧启山,艾素华,于维成,夏月波,胡运明,张广平.材料的疲劳[M].北京:国防工业出版社,1999:157-306. |
| [2] | SHIN C S;HSU S H .On the mechanisms and behavior of overload retardation in AISI 304 stainless steel[J].International Journal of Fatigue,1993,15(03):181-192. |
| [3] | Masayuki Shimojo;Makoto Chujo;Yakichi Higo;Shigetomo Nunomura .Mechanism of the two stage plastic deformation following an overload in fatigue crack growth[J].International Journal of Fatigue,1998(5):365-371. |
| [4] | Sadananda, K;Holtz, RL;Lee, EU;Vasudevan, AK .Analysis of overload effects and related phenomena[J].International Journal of Fatigue,1999(Supplement 1):0-0. |
| [5] | L. P. Borrego;J. M. Ferreira;J. M Pinho da Cruz .Evaluation of overload effects on fatigue crack growth and closure[J].Engineering Fracture Mechanics,2003(11):1379-1397. |
| [6] | M. Croft;Z. Zhong;N. Jisrawi .Strain profiling of fatigue crack overload effects using energy dispersive X-ray diffraction[J].International Journal of Fatigue,2005(10/12):1408-1419. |
| [7] | 魏学军;李劲;柯伟 .A537钢疲劳裂纹扩展单次拉伸超载效应及裂尖变形,裂纹闭合行为[J].材料研究学报,1996,10(06):608-661. |
| [8] | 关辉;李劲;魏学军;柯伟 .AISI 321不锈钢单周过载疲劳裂纹扩展的延迟效应[J].金属学报,1999,35(04):403-440. |
| [9] | 关辉,李劲,魏学军,韩恩厚,柯伟.环境对AISI321不锈钢疲劳裂纹扩展过载效应的影响[J].金属学报,2003(06):613-616. |
| [10] | 聂德福;马海涛;赵杰 .X70钢室温蠕变及对疲劳裂纹扩展行为的影响[J].材料研究学报,2007,21(z1):91-99. |
| [11] | 刘黎明,王继锋,宋刚.激光电弧复合焊接AZ31B镁合金[J].中国激光,2004(12):1523-1526. |
| [12] | 张兆栋,刘黎明,沈勇,王来.镁合金的活性电弧焊接[J].中国有色金属学报,2005(06):912-916. |
| [13] | 陈振华;严红革;陈吉华;全亚杰 王慧敏 陈鼎.镁合金[M].北京:化学工业出版社,2004:202-323. |
| [14] | 张津;章宗和.镁合金及应用[M].北京:化学工业出版社,2004:39-175. |
| [15] | K. Tokaji;M. Kamakura;Y. Ishiizumi .Fatigue behaviour and fracture mechanism of a rolled AZ31 magnesium alloy[J].International Journal of Fatigue,2004(11):1217-1224. |
| [16] | Z.Y. Nan;S. Ishihara;T. Goshima .Scanning probe microscope observations of fatigue process in magnesium alloy AZ31 near the fatigue limit[J].Scripta materialia,2004(4):429-434. |
| [17] | MARA M;GHECTOR L;VERMA R;TONG W .Microstructural effects of AZ31 magnesium alloy on its tensile deformation and failure behavior[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2006,418(1-2):341-356. |
| [18] | GB 2038-1991.GB 2038-1991.金属材料延性断裂韧度JIC试验方法[S]. |
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%