刘宝胜,王亚宁,张跃忠,侯利锋,卫英慧.Mn添加对挤压态Mg-Zn-Y-Nd合金微观组织和腐蚀行为的影响[J].稀有金属材料与工程,2021,50(1):49~55.[刘宝胜,wangyaning,zhangyuezhong,houlifeng,weiyinghui.Microstructure and corrosion behavior of extruded Mg-Zn-Y-Nd alloy respect to Mn addition[J].Rare Metal Materials and Engineering,2021,50(1):49~55.]
Mn添加对挤压态Mg-Zn-Y-Nd合金微观组织和腐蚀行为的影响
投稿时间:2019-11-28  修订日期:2019-12-09
中文关键词:  Mg-Zn-Y-Nd合金  Mn含量  微观组织  动态再结晶  耐腐蚀性
基金项目:山西省高等学校科技成果转化项目(TSTAP),山西省新兴产业领军人才项目,中央引导地方科技发展专项资金项目(YDZX20181400002967),山西省研究生优秀创新项目(2019Y483)。
中文摘要:
      通过光学显微镜,配备能量色散光谱仪的扫描电子显微镜,X射线衍射仪,浸泡法和电化学测试的方法研究了Mn的添加对挤压Mg-Zn-Y-Nd合金在3.5wt.%NaCl溶液中的微观组织和腐蚀行为的影响。结果表明,在研究的Mg-Zn-Y-Nd合金中添加Mn可以诱导Mg3Y2Zn3(I相)沉淀,可以抑制热挤压过程中动态再结晶(DRX)晶粒的粗化。同时,添加了Mn也可以提高合金的耐腐蚀性。不含Mn的Mg-5.6Zn-1Y-0.4Nd合金与含锰1.0 wt.%的Mg-5.6Zn-1Y-0.4Nd合金腐蚀速率分别为18.78 mm·y-1和9.89mm·y-1。而耐腐蚀性的提高主要归因于腐蚀产物层保护性的增强。
Microstructure and corrosion behavior of extruded Mg-Zn-Y-Nd alloy respect to Mn addition
英文关键词:Mg-Zn-Y-Nd alloy  Mn addition  microstructure  dynamic recrystallizaiton (DRX)  corrosion resistance
英文摘要:
      The effect of Mn addition on the microstructure and corrosion behavior of extruded Mg-Zn-Y-Nd alloy immersed in 3.5 wt.% NaCl solution were studied by optical microscope, scanning electron microscope equipped with energy dispersive spectroscope, X-ray diffraction, immersion, and electrochemical measurements. Results suggest that the Mn addition in the studied Mg-Zn-Y-Nd alloy can induce Mg3Y2Zn3 (I-phase) precipitation which may inhibit dynamic recrystallizaiton (DRX) grain coarsening during hot extrusion. Meanwhile, its corrosion resistance was improved owing to the addition of Mn. The corrosion rates of free and 1.0 wt.% Mn containing Mg-5.6Zn-1Y-0.4Nd alloys were 18.78 and 9.89 mm·y?1, respectively. The improvement of corrosion resistance is mainly due to an enhanced protectiveness of the corrosion product layer.
作者单位E-mail
刘宝胜 太原科技大学 liubaosheng@tyut.edu.cn 
王亚宁 太原科技大学 Wangyaning527@163.com 
张跃忠 太原科技大学 yuezhongzhang@tyust.edu.cn 
侯利锋 太原理工大学 houlifeng78@126.com 
卫英慧 太原理工大学 yhwei_tyut@126.com 
摘要点击次数: 65
全文下载次数: 49
查看全文  查看/发表评论  
关闭