Experiment investigation on microstructure and mechanical properties of TC17 titanium alloy treated by laser shock peening with different laser fluence

摘要

In this paper, microstructure, microhardness, and residual stress of TC17 titanium alloy treated bynlaser shock peening (LSP) with different laser fluence were examined and compared by x-rayndiffraction, scanning electron microscope, transmission electron microscope, microhardness test,nand residual stress test. The results of microstructure point out that microstrains andngrain-refinement are generated in the material surface layer which is a severe plastic deformationnlayer. In relation to the microhardness and residual stress, the results indicate that LSP cannobviously improve the hardness and introduce a great compressive residual stress which also has angood thermal stability. VC 2013 Laser Institute of America.