Journal Article

IMPULSE-2025-00136

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Effect of RE/Zn atomic ratio on the microstructure of Mg-Zn-Gd-Y alloys during rolling process: A new composition design strategy for high-strength and high-thermal-conductivity magnesium alloy

Li, X. ; Shi, H. (Corresponding author) ; Li, X. ; Gan, W.MLZ* ; Xu, C. ; Ding, C. ; Tursunbaev, S. ; Turakhodjaev, N. ; Hu, X. ; Wang, X.

2026
Elsevier Amsterdam [u.a.]

Please use a persistent id in citations: doi:10.1016/j.jma.2025.06.029

Abstract: The design of high-strength and high-thermal-conductivity magnesium alloy sheets is challenged by the inherent contradiction between strength and thermal conductivity, as well as the complex variables involved in the rolling process. In this study, Mg-xZn-0.5Gd-0.5Y (at.%) (1/x = 0.5, 1.0, 1.5) alloys were developed by adjusting the atomic ratio of rare earth (RE) elements to Zn. In the subsequent multi-pass hot rolling process, the influence of various factors on the microstructure and comprehensive properties of alloys with different compositions was obtained. With the decrease of RE/Zn atomic ratio, the W phase gradually dominates, which ensures the high thermal conductivity throughout the preparation process. Additionally, the thickness reduction per pass plays a decisive role in the properties of alloys by affecting the precipitates, dislocations and grains. The reheating between passes plays a coordinating role in the whole rolling process through the twin-induced static recrystallization mechanism. The findings indicate that leveraging the advantages of large thickness reduction per pass and effectively coordinating strain accumulation is a viable strategy for progressively enhancing the strength of high-thermal-conductivity magnesium alloys, ultimately leading to superior comprehensive performance. This study provides systematic research results for the composition design and process optimization of high-strength and high-thermal-conductivity magnesium alloy rolled sheets, which is helpful to promote the performance breakthrough and application expansion in this field.

Keyword(s): Engineering, Industrial Materials and Processing (1st) ; Materials Science (2nd)

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Contributing Institute(s):

1. STRESSI (STRESSI)
2. MATSCI (MATSCI)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2026

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Database coverage:
; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; DOAJ Seal ; Essential Science Indicators ; Fees ; IF >= 15 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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