Effects of Al on microstructure and mechanical properties of hot-extruded Mg–3Nd alloys

Abstract

The effects of Al content on microstructure, texture, and mechanical properties of as-extruded Mg–3Nd alloy were investigated. The particle stimulated nucleation effect of Al₂Nd and Al₁₁Nd₃ phases promotes dynamic recrystallisation and the texture is weakened of the as-extruded alloys. With the increase in Al content in the alloys, the microstructure transformed from a bimodal structure to an almost fully recrystallised structure. Grain refinement, the distribution of the second phases, and texture are important factors determining the mechanical properties of as-extruded alloys. As-extruded Mg–3Nd–3Al achieved a good balance of strength and plasticity. The ultimate tensile strength, yield strength, and elongation are 283, 221.3 MPa, and 15.7%, respectively.

KEYWORDS:

• Mg–3Nd alloy
• hot extrusion
• microstructure
• recrystallisation
• mechanical properties

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China [grant number 51804090], [grant number 51971086], Heilongjiang Provincial Key Research and Development Program [grant number GZ20210080], the University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [grant number UNPYSCT-2020184].