对激光辐照后Ly12 CZ铝合金的疲劳寿命明显提高的原因进行了微观研究。结果表明位错胞尺寸λ在疲劳失效时都趋向于一常量λ_c。结合损伤力学建立了该材料的疲劳损伤判据及损伤演变过程,分别为: D_c=1-(λ_c/λ_0)~P D=1-{1-[1-(λ_c/λ_0)~(P(1+γ))](N/N_f)}~(1/(1+γ)
The change of microstructure of fatigue specimens before and after la-ser radiation was studied by transmission electron microscopy. The results show thatthe diameter of dislocation cell λ tends to a constant λ_c at fatigue failure. Based onthe principles of continuuous damage mechanics, expressions of the fatigne damagecriterion and processes of fatigue damage evolution for LY12CZ have been derived.
参考文献
| [1] | |
| [2] | |
| [3] |
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%