On Variable Scale Evolution of Stress and Strain of TA2 Titanium Plate in Combined Hammering

Combined peening composed of multiple processes or media is a surface treatment method for comprehensive control the macro shape and performance part. Compared to combined peening, impact kinetic energy hammering can be easier over wide range, hammer tool head size larger than shot. This paper focused on investigating effect treatment, 6 mm 14 heads with density 3.7 4.2/mm2, variable scale evolution titanium TA2. Three types contact relation between existing dimple were proposed impacting at same position. The varies in width depth direction, resulting nest morphology different dimples. cross-section microstructure test plate was observed, gradient changes dislocation, slip, grain are smoothed by hammering. change makes target plastic deform depths. sequence has significant influence stress strain fields. When first large then small, compressive residual near introduced, about 1000 Mpa; contrary, distributes uniformly an affected layer 4.4 mm. measured verified reliability simulation results.