Indian Journal of Engineering & Materials Sciences

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Microstructure, texture, and mechanical properties of two-pass extruded Mg-5Li-1Al sheet


Affiliations
1 School of Materials and Metallurgy, Inner Mongolia University of Science and Technology,7Arden Street, Baotou 014010, China
2 College of Materials Science and Engineering, Chongqing University, Chongqing 400044,, China
3 The tenth sub-company, Inner Mongolia First Machinery Group Corporation, Baotou 014030,, China
4 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
5 Quality Management Department, Inner Mongolia First Machinery Group corporation, Baotou 014030,, China

To overcome the difficult deformation of common Mg alloys, the Mg-5Li-1Al (wt %) alloy sheet with good strength-ductility balance has been successfully fabricated by two-pass extrusion at 280 °C. The microstructural evolution, texture, mechanical properties and stretch formability of the extruded sheets have been investigated. The results show that a refined microstructure can be obtained by two-pass extrusion due to dynamic recrystallization (DRX). The extruded sheet exhibits excellent formability with elongation to failure (FE) of 34% and Erichsen value of 4.82. The superior mechanical properties have been owing to both ultrafine DRX grains and weaken basal texture resulted from lithium addition.
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  • Microstructure, texture, and mechanical properties of two-pass extruded Mg-5Li-1Al sheet

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Authors

Ruihong Li
School of Materials and Metallurgy, Inner Mongolia University of Science and Technology,7Arden Street, Baotou 014010, China
Bin Jiang
College of Materials Science and Engineering, Chongqing University, Chongqing 400044,, China
Zhijun Chen
The tenth sub-company, Inner Mongolia First Machinery Group Corporation, Baotou 014030,, China
Fusheng Pan
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Xiaomei Zhang
Quality Management Department, Inner Mongolia First Machinery Group corporation, Baotou 014030,, China

Abstract


To overcome the difficult deformation of common Mg alloys, the Mg-5Li-1Al (wt %) alloy sheet with good strength-ductility balance has been successfully fabricated by two-pass extrusion at 280 °C. The microstructural evolution, texture, mechanical properties and stretch formability of the extruded sheets have been investigated. The results show that a refined microstructure can be obtained by two-pass extrusion due to dynamic recrystallization (DRX). The extruded sheet exhibits excellent formability with elongation to failure (FE) of 34% and Erichsen value of 4.82. The superior mechanical properties have been owing to both ultrafine DRX grains and weaken basal texture resulted from lithium addition.