Achieving a high-strength binary Mg–15Gd alloy by nano substructure with Gd segregation and nano clusters¹

Abstract

A high-strength binary Mg–15Gd alloy plate, prepared by the conventional extrusion, warm-rolling and aging, exhibits an excellent mechanical property with 504, 518 MPa and 4.5% for yield strength, ultimate tensile strength and elongation, which is mainly attributed to the nano substructure with boundary segregation of Gd atoms, the high-density nano clusters induced by dislocations in the interior of grains, the high-density dynamical precipitates with submicron size, and the strong basal texture.

GRAPHICAL ABSTRACT

IMPACT STATEMENT

A new strengthening mechanism involving the nano substructure with Gd segregation, high-density nano Gd clusters induced by dislocations, and high-density dynamical precipitates has been found in Mg–Gd binary alloys.

KEYWORDS:

• Binary Mg–Gd alloy
• nano substructure
• nano clusters
• dynamical precipitates
• segregation

Acknowledgements

The authors are grateful for the facilities and technical supports provided by Shenyang University of Chemical Technology and Northeastern University.

Disclosure statement

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

Additional information

Funding

The work is supported by National Key Research and Development Program of China (Grant Number 2021YFB3701000), National Natural Science Foundation of China (Grant Numbers 52171121, 51971151 and 51971053), Liao Ning Xingliao Program (Grant Number XLYC1907083), Science Research Project of Liaoning Province Education Department (Grant Number LQ2019002).