摘要
采用X射线衍射应力测试技术,分析了热载荷、力载荷及热-力耦合载荷下7075高强铝合金喷丸试样表面残余应力的松弛现象,讨论了不同热-力载荷加载路径下残余应力松弛的机理与规律。结果表明,不同性质载荷最终对材料微观动、静力学特性的影响类似,引起残余应力松弛效果相当。
The surface residual stress relaxations of the shot-peened 7075 high-strength aluminum alloy specimens under thermal loading, force load and coupled thermal-force load were determined by X-ray diffraction technology. Moreover, mechanism and pattern of the stress relaxation under different thermal-force loading paths were discussed. The results show that different loading paths can cause equivalent residual stress relief by influencing the same microscopic dynamic and static mechanic characteristics.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2013年第5期403-405,共3页
Special Casting & Nonferrous Alloys
基金
湖南省教育厅资助项目(11C0935)
关键词
喷丸
残余应力
应力松弛
加载路径
Shot Peening
Residual Stress
Stress Relaxation
Loading Path
