Back to Search
Start Over
Towards development of a high-strength stainless Mg alloy with Al-assisted growth of passive film.
- Source :
- Nature Communications; 10/3/2022, Vol. 13 Issue 1, p1-8, 8p
- Publication Year :
- 2022
-
Abstract
- 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<superscript>−1</superscript>, 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 Y<subscript>2</subscript>O<subscript>3</subscript>/Y(OH)<subscript>3</subscript> can be fast developed with the aid of Al<subscript>2</subscript>O<subscript>3</subscript>/Al(OH)<subscript>3</subscript> 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 13
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 159474606
- Full Text :
- https://doi.org/10.1038/s41467-022-33480-w