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  

Experimental Study of Electrochemical Corrosion Properties of 5052 Aluminum Alloy Treated by New Laser Shock Peening System

作　　者：宁成义 黄亿辉[1] 徐子法 张文武[1] 

机构地区：[1]中国科学院宁波材料技术与工程研究所,浙江宁波315201 [2]中国科学技术大学纳米科学技术学院,江苏苏州215000

出　　处：《电加工与模具》2017年第6期32-34,共3页Electromachining & Mould

摘　　要：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。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.

关 键 词：激光冲击强化 5052铝合金 电化学性能 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]