超声冲击时间对MB8镁合金表面耐腐蚀性能的影响Effect of ultrasonic impact treatment time on surface corrosion resistance of MB8 magnesium alloy
江明明;何柏林;李力;于影霞;
摘要(Abstract):
利用HJ-III超声冲击机对MB8镁合金表面进行超声冲击处理,研究不同冲击时间参数下MB8镁合金表面的残余应力和耐腐蚀性能的差异。结果表明:MB8镁合金表面的耐腐蚀性能与冲击时间不是一直呈线性关系;适度的超声冲击可显著提高MB8在盐水溶液中的耐腐蚀性,在冲击电流为1.2 A时,冲击6 min的试样相较于未冲击的试样耐腐蚀性提高68.3%;在一定的冲击时间范围内,冲击时间越长,镁合金表面的耐腐蚀性能越好。
关键词(KeyWords): MB8镁合金;耐腐蚀性能;超声冲击;残余应力
基金项目(Foundation): 国家自然科学基金项目(51265013);; 江西省自然科学基金项目(20151BAB206007);; 江西省工业支撑重点项目(20161BBE50072)
作者(Author): 江明明;何柏林;李力;于影霞;
Email:
DOI: 10.14024/j.cnki.1004-244x.20170427.005
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