Journal Article

PUBDB-2025-01392

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Effect of particle reinforcements on the texture and dislocation activities of magnesium matrix composites

Liu, J. ; Deng, J. ; Zhu, T. ; Zhu, G. (Corresponding author)Extern* ; Wang, J. ; Jia, H. ; Zhou, B. (Corresponding author)

2025
Science Direct New York, NY

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Please use a persistent id in citations: doi:10.1016/j.matchar.2025.115052  doi:10.3204/PUBDB-2025-01392

Abstract: The introduction of ceramic particles into magnesium (Mg) alloys not only leads to a grain refinement effect but also influences their texture. However, dislocation activities within the Mg matrix resulting from these effects remain unclear. In this study, in-situ tensile testing combined with synchrotron radiation techniques was utilized to investigate the microstructure, load partitioning, and dislocation density evolution of SiCp/Mg–5Zn and Mg–5Zn samples under different tensile strain conditions. It was found that more dislocation slip systems were involved in the SiCp/Mg–5Zn composite during deformation, whereas the Mg–5Zn alloy exhibited a higher capacity for dislocation accumulation. By an elasto-plastic self-consistent (EPSC) model and a full-field crystal plasticity finite element method (CPFEM) simulation, the pyramidal <c + a > dislocation activity was identified after a 2 % strain in the SiCp/Mg–5Zn composite. This was accompanied by the load transfer between α-Mg grains as well as regions with different SiCp volume fractions. Additionally, a novel texture formation mechanism was proposed to explain the texture characteristics of Mg matrix composites (MMCs). The strengthening mechanisms induced by reinforcements were also quantified.

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P21.2 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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