Spatial Distribution Evolution of Residual Stress and Microstructure in Laser-Peen-Formed Plates
作者： Zheng Zhang , Wen Huang , Guoxin Lu , Yongkang Zhang
DOI: 10.3390/MA13163612
关键词: Forming processes 、 Stiffness 、 Microstructure 、 Diffraction 、 Residual stress 、 Materials science 、 Composite material 、 Compressive strength 、 9 mm caliber 、 Peening
摘要: Residual stress in structural components is crucial as it affects both service performance and safety. To investigate the evolution of residual a laser-peen-formed panel, this study adopted two plate samples thickness 3 9 mm instead conventional Almen strip. The plates were peened with an identical energy density 10.99 GW/cm2. across entire section was determined using slitting method, near-surface then verified by X-ray diffraction. Furthermore, cross-sectional variation hardness microstructure characterized to understand evolution. experimental results showed that different thicknesses resulted distinct spatial distributions stress. 3-mm demonstrated shallow (0.5 mm) lower compressive magnitude (−270 MPa) compared deeper (1 higher (−490 9-mm plate. Further analysis revealed deformation compatibility during forming process inevitably leads compensation effect on side. decrease depth thin mainly attributed low stiffness large deflection.
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