Development of age-hardenable wrought magnesium alloys with high strength

研究了具有时效硬化性的高强度变形镁合金的发展潜力，以扩大镁合金在交通运输领域的应用。Al和In的加入增强了Mg-Ca基合金的时效硬化响应。添加Al的合金在基面上形成单层gp区，而添加In的合金在锥体面上形成平面沉淀。锥体析出相比基型析出相具有更有效的析出硬化作用，因此该合金的研究成果可为开发新型时效硬化镁合金提供参考。基于这些结果，我们成功地获得了抗拉应力超过400 MPa的超高强度挤压Mg-Al-Ca-Mn合金。

In this work, the potential for development of high strength wrought Mg alloys with age-hardenability was studied to expand the use of Mg products in transportation field. The age-hardening response of Mg-Ca based alloys enhanced by the addition of Al and In. The Al added alloys form the monolayer G. P. zones on the basal planes, while the In added ones do the planar precipitates on the pyramidal planes. The pyramidal precipitates have been known to give effective precipitation hardening rather than the basal ones, so the knowledge obtained from the research of this alloy can be useful for development of new age-hardenable Mg alloy. Based on these results, we successfully achieved ultra-high strength extruded Mg-Al-Ca-Mn alloys with tensile proof stress of over 400 MPa.