南京理工大学学报（自然科学版）2025，Vol.49Issue(2)：223-232,10.DOI:10.14177/j.cnki.32-1397n.2025.49.02.010
超声冲击对电弧增材制造铝合金应力及变形的影响
Effect of ultrasonic impact on stress and deformation of aluminum alloy made by wire and arc additive manufacturing
摘要
Abstract
Due to the process of aluminum alloy additive manufacturing in the preparation of components,a large amount of residual stress remains inside the components.Applying ultrasonic impact to reduce residual stress can significantly improve the performance of the components.Assist in the process of wire and arc additive manufacturing by adding ultrasonic impact with synchronous welding gun movement to manufacture 2219 aluminum alloy single-layer and multi-channel deposited parts.And under this auxiliary condition,the residual stress and material deformation of the deposited parts prepared were experimentally measured and numerically simulated.The influence of single ultrasonic impact assistance of synchronous welding gun on residual stress and material deformation was analyzed.The simulation results show that the stress in the deposited parts is released after the application of synchronous ultrasonic impact assistance,and the stress concentration in the area just deposited is not obviously reduced.The equivalent residual stress of the deposited parts with ultrasonic impact has the same change trend as that without ultrasonic impact,but the value of tensile stress is obviously reduced.The peak value of equivalent residual stress decreases from 217.5 MPa without ultrasonic impact to 163.1 MPa with ultrasonic impact.After deposition and cooling for 300 seconds,the value of average equivalent residual stress decreases from 153.12 MPa to 114.43 MPa,the residual stress decreases by 25.27%.The stress range of surface residual stress measured in practice decreases from 90.03～207.71 MPa to 54.25～141.62 MPa,and the average residual stress decreases by 29.16%.Experiments and simulations confirm that the addition of ultrasonic impact assistance reduces residual stress in aluminum alloy components,effectively improves performance,and expands application fields.关键词
电弧增材制造/2219铝合金/同步超声冲击/残余应力/有限元分析Key words
wire and arc additive manufacturing/2219 aluminum alloy/synchronous ultrasonic impact/residual stress/finite element analysis分类
航空航天引用本文复制引用
秦泽辉,李攀,杨东青,李晓鹏..超声冲击对电弧增材制造铝合金应力及变形的影响[J].南京理工大学学报（自然科学版）,2025,49(2):223-232,10.基金项目
航空科学基金(20230011059001) （20230011059001）
中央高校基本科研业务费专项资金(30924010829) （30924010829）
