新一代激光冲击强化系统对5052铝合金电化学性能的实验研究

摘要

The samples of 5052 aluminum alloys were treated by a new laser shock peening (LSP) system.The electrochemical corrosion behavior of the treated samples was investigated.In addition,XRD patterns,surface hardness and corrosion morphology were also examined and discussed.Results show that after LSP treated once and twice,the main phases were not changed,surface hardness increased 7.0％ and 19.8％,and the corrosion rate decreased about 27.0％ and 35.0％ respectively.Therefore,LSP could prevent corrosion micro-crack propagation along and improve the resistance of electrochemical corrosion on 5052 aluminum alloys.%利用新一代激光冲击强化系统对5052铝合金试样进行了激光冲击强化处理,通过实验研究了试样的电化学性能,并对材料的物相、表面硬度、腐蚀形貌进行了检测与分析.结果表明:经过激光冲击强化一次、两次后,材料没有发生相变,表面硬度分别提高了7.0％和19.8％,腐蚀速率分别下降了27.0％和35.0％.因此,激光冲击强化处理能有效抑制腐蚀裂纹的扩展,显著提高材料的耐腐蚀性.