摘要
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。
MB8 magnesium alloy was treated using HI-3 type ultrasonic impact treatment machine. The effect of ultrasonic impact time on the surface residual stress and the corrosion resistance was investigated. The test results show that the surface corrosion resistance of MB8 magnesium alloy is not always a linear relationship with the impact time. Appropriate ultrasonic impact can significantly improve MB8 corrosion resistance in saline solution. Compared with the samples not being impacted, when the impact current is 1.2 A and impact time is 6 rain, the corrosion resistance is increased by 68.3%. Within the scope of a certain impact time, the longer the impact time, the better the corrosion resistance of magnesium alloy surface.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2017年第3期70-73,共4页
Ordnance Material Science and Engineering
基金
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)
关键词
MB8镁合金
耐腐蚀性能
超声冲击
残余应力
MB8 magnesium alloy
corrosion resistance
ultrasonic impact treatment
residual stress
