摘要
研究了Mn对Mg95.5Y3Cu1.5合金的组织、拉伸性能和腐蚀行为的影响。结果表明,随着Mn含量的提高合金中的初生α-Mg相细化,其形貌由树枝晶转变为等轴枝晶状,而LPSO相的形貌和体积分数未发生明显的变化;合金的屈服强度、极限拉伸强度和伸长率都提高,与未添加Mn的合金相比Mn含量为0.9%(原子分数)的合金分别提高了20.7%、17.6%和41.0%。合金试样在1%(质量分数)NaCl溶液中的析氢速率、质量损失速率和腐蚀电流密度都降低,腐蚀电位向正向移动,表明其耐腐蚀性能提高。
The effect of Mn on the solidification microstructure,tensile properties and corrosion behavior of Mg95.5Y3Cu1.5 alloy was investigated.The results show that with the increase of Mn content,the primaryα-Mg phase in the alloy is gradually refined,and it also changes from dendritic to equiaxed dendritic morphology,while the morphology and volume fraction of LPSO phase do not change significantly.The addition of Mn improves the tensile properties of the alloy.When the Mn content is 0.9%(atom fraction)the yield strength,ultimate tensile strength and elongation are increased by 20.7%,17.6%and 41.0%respectively compared with the alloy without Mn addition.In addition,the corrosion performance of the alloy is also improved.With the increase of Mn content,the volume of hydrogen evolution rate,mass loss rate and corrosion current density of the alloys gradually decrease,and the corrosion potential of the alloys,meanwhile,gradually moves towards positive direction.
作者
张帅杰
吴谦
陈志堂
郑滨松
张磊
徐翩
ZHANG Shuaijie;WU Qian;CHEN Zhitang;ZHENG Binsong;ZHANG Lei;XU Pian(School of Aeronautical Manufacture Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2023年第5期362-370,共9页
Chinese Journal of Materials Research
基金
国家自然科学基金(51401102)。
