Surface Profiles and Residual Stresses on Laser Shocked Zone of Ti6Al4V Titanium Alloy
The latest application of laser shock processing was summarized in this paper, and laser peening with water confined layer has been applied to Ti6Al4V titanium alloy using Nd: glass pulse laser. The profile of plastic deformation and residual stresses on metal surface were studied with different laser power density. The investigation results show that peak depth of plastic deformation is in linear proportion to laser power density (5.75GW/cm2 to 9.5 GW/cm2), and maximal surface compressive residual stress gets to 375MPa at 8.25GW/cm2. It was ensured that the compressive residual stress field related to laser power density and shocked times. As spot overlapping ratio at 33％, the circle spot can get a relative smooth surface. Almen strip with thickness 2.5mm was shocked as the preliminary verification test of residual stress, and it is shown that excessive peening times is unavailable to thin-wall parts just as edge of fan blades.
laser shock processing ti6al4v surface profiles residual stresses
Z.W.Cao S.L.Gong S.K.Zou Z.G.Che
Science and Technology on Power Beam Processes Laboratory, AVIC Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, P.R.China
国际会议
北京
英文
237-240
2010-10-25（万方平台首次上网日期，不代表论文的发表时间）