1. Influence of yttrium on microstructure and mechanical properties of as-cast Mg–5Li–3Al–2Zn alloy
- Author
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Cui, Chongliang, Wu, Libin, Wu, Ruizhi, Zhang, Jinghuai, and Zhang, Milin
- Subjects
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YTTRIUM , *MICROSTRUCTURE , *MECHANICAL properties of metals , *MAGNESIUM alloys , *PHASE transitions , *TEMPERATURE effect , *STRENGTHENING mechanisms in solids , *METALS , *DUCTILITY - Abstract
Abstract: The influence of Y on microstructure and mechanical properties of as-cast Mg–5Li–3Al–2Zn alloy was investigated. The results show that the phase compositions of Mg–5Li–3Al–2Zn consist of α-Mg and AlLi phases. Adding Y to the alloy results in the formation of Al2Y compound and facilitates grain refinement. The addition of 0.8wt.% Y produces the smallest grain size. The tensile tests performed at room temperature show that the additions of Y can improve the mechanical properties of the alloy; the tensile strength and ductility reach peak values when the Y additions are 0.8wt.% and 1.2wt.%, respectively. The mechanisms of improvement are related to grain refinement and compound strengthening effects. [Copyright &y& Elsevier]
- Published
- 2011
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