CAJ | 학술논문

研究不同含量的Sr和Y对AZ31镁合金组织与耐蚀性能的影响.结果表明:添加Sr可以明显减小AZ31合金的晶粒尺寸,使fl-Mgl7AIl2相从连续网状结构转变为弥散均匀分布颗粒状,并在AZ31-xSr合金中生成沿晶界分布的Al4Sr相.同时添加Sr和Y的晶粒细化效果好于单独添加sr的.生成晶内和沿晶界分布的Al2Y和Al3Y相.在AZ3 1镁合金中加入0.5%Sr+xY,其耐蚀性能明显提高.AZ31-0.5%Sr-1.5%Y合金的腐蚀电流和腐蚀速率最小,耐蚀性能最好.
연구불동함량적Sr화Y대AZ31미합금조직여내식성능적영향.결과표명:첨가Sr가이명현감소AZ31합금적정립척촌,사fl-Mgl7AIl2상종련속망상결구전변위미산균균분포과립상,병재AZ31-xSr합금중생성연정계분포적Al4Sr상.동시첨가Sr화Y적정립세화효과호우단독첨가sr적.생성정내화연정계분포적Al2Y화Al3Y상.재AZ3 1미합금중가입0.5%Sr+xY,기내식성능명현제고.AZ31-0.5%Sr-1.5%Y합금적부식전류화부식속솔최소,내식성능최호.
The effects of Sr and Y with different contents on the microstructure and corrosion resistance of AZ31 alloy were investigated. The results indicate that the addition of Sr can obviously reduce the grain size of AZ31 alloy and transform β-Mg17Al12a phase from continuous network to scattered form. Simultaneously, A14Sr phase distributed along the boundaries of grains is formed in AZ3 l-Sr magnesium alloys. The addition of Sr is not as effective as the simultaneous addition of Sr+Y for the refinement of grains, and Al2Y and AI3Y phases are distributed both in intracrystalline and along grain boundaries. The corrosion resistance is improved slightly in AZ31 alloy with simultaneous addition of 0.5%Sr+Y. Due to its smallest corrosion current density and corrosion rate, the corrosion resistance of AZ31-0.5%Sr-1.5%Y magnesium alloy is proved the best.