Improving creep properties of 7075 aluminum alloy by laser shock peening

LSP can enhance the steady-stage creep life by 97% at 350 MPa/200 °C, 307% at 350 MPa/200 °C, and 120% at 300 MPa/200 °C, respectively. The mechanism for improving the creep properties of 7075 aluminum alloys by LSP was analyzed by TEM observation. Moreover, the creep process and mechanism of the variation of their microstructures were discussed.143