Towards development of a high-strength stainless Mg alloy with Al-assisted growth of passive film.
Towards development of a high-strength stainless Mg alloy with Al-assisted growth of passive film.
复制标题
DOI：
10.1038/s41467-022-33480-w
复制
发表时间：
2022-10-03
影响因子：
16.6
通讯作者：
Zeng, Xiaoqin
中科院分区：
文献类型：
--
作者：
Zhu, Qingchun;Li, Yangxin;Cao, Fuyong;Qiu, Dong;Yang, Yao;Wang, Jingya;Zhang, Huan;Ying, Tao;Ding, Wenjiang;Zeng, Xiaoqin
具有高强度和优异耐腐蚀性的镁合金在汽车和航空航天应用的轻质结构部件中一直备受青睐。然而，对于大多数具有高比强度的镁合金，它们通常具有较差的耐腐蚀性，反之亦然。在这项工作中，我们成功地开发了Mg-11Y-1Al（wt. %）的合金通过常规铸造、固溶处理然后挤压。该合金的总体性能特征为腐蚀速率低于0.2 mm y-1，屈服强度为350 MPa，拉伸伸长率为8%，其组合显示出比文献中的其他对比镁合金具有竞争优势。结果表明，Al2O3/Al（OH）3复合镀层能快速形成一层薄而致密的Y2O3/Y（OH）3保护膜，使合金免受腐蚀介质的进一步侵蚀。同时，晶粒细化、织构弱化和非基面滑移系的激活共同促成了高强度和良好的塑性。我们的研究结果有望启发下一代高性能镁合金的设计。高强度镁合金通常在汽车和航空航天应用中受到追捧，但它们具有较差的耐腐蚀性。在此，作者开发了Mg-11Y-1Al（wt. %）合金，显示出显着改善的机械性能和耐腐蚀性。
Magnesium alloys with high strength and excellent corrosion resistance are always sought-after in light-weighting structural components for automotive and aerospace applications. However, for most magnesium alloys that have a high specific strength, they usually have an inferior corrosion resistance and vice versa. In this work, we successfully develop a Mg-11Y-1Al (wt. %) alloy through conventional casting, solution treatment followed by extrusion. The overall properties of this alloy feature with a corrosion rate lower than 0.2 mm y−1, high yield strength of 350 MPa and moderate tensile elongation of 8%, the combination of which shows competitive advantage over other comparative magnesium alloys in the literature. It is found that a thin and dense protective film of Y2O3/Y(OH)3 can be fast developed with the aid of Al2O3/Al(OH)3 deposition to isolate this alloy from further attack of corrosion medium. Meanwhile, the refined grains, weak texture and activation of non-basal slip systems co-contribute to the high strength and good ductility. Our findings are expected to inspire the design of next-generation high performance magnesium alloys. High-strength Mg alloys are often sought-after for automotive and aerospace applications, but they have an inferior corrosion resistance. Here, the authors develop a Mg-11Y-1Al (wt. %) alloy that shows both significantly improved mechanical properties and corrosion resistance.
登录
查看更多内容
影响因子：
6.2
作者：
Li, Cheng-jie;Sun, Hong-fei;Tan, Ze-yi
通讯作者：
Tan, Ze-yi
影响因子：
3.9
作者：
Shahabi-Navid, M.;Esmaily, M.;Johansson, L. -G.
通讯作者：
Johansson, L. -G.
影响因子：
13.3
作者：
Deng, Min;Wang, Linqian;Zheludkevich, Mikhail L.
通讯作者：
Zheludkevich, Mikhail L.
影响因子：
6
作者：
Homma, T.;Kunito, N.;Kamado, S.
通讯作者：
Kamado, S.
影响因子：
8.3
作者：
Lindström, R;Johansson, LG;Svensson, JE
通讯作者：
Svensson, JE