Work

Effect of SiC particle distribution on the microstructure and texture evolution of SiCp/Mg–Zn–Ca–Zr composite during wedge-shaped rolling

Year: 2026

Type: article

Abstract: The spatial distribution of ceramic reinforcements plays a critical role in controlling deformation heterogeneity, recrystallization, and texture evolution in particle-reinforced magnesium matrix composites. However, how different initial SiC particle distributions regulate the microstructural and textural evolution pathways during rolling remains insufficiently understood. In this study, SiC p /Mg-Zn-Ca-Zr composites with two typical particle distributions were compared: an as-cast state with necklace-like SiC particles along grain boundaries and an as-extruded state with a more uniform banded particle distribution. Both composites were subjected to wedge-shaped rolling at 250 °C to clarify the role of particle distribution in dynamic recrystallization and rolling texture evolution. In the as-cast composite, the clustered SiC particles induced strong local stress concentration and dislocation accumulation, promoting particle-stimulated nucleation and twinning-related recrystallization at low reductions. The heterogeneous deformation, together with twinning and multiple slip activation, contributed to a metastable rare-earth-like texture, which gradually transformed into a bimodal basal texture with increasing reduction. In contrast, the more uniformly distributed SiC particles in the as-extruded composite weakened local stress concentration and homogenized plastic deformation, facilitating continuous c-axis rotation toward the normal direction. Consequently, nearly complete recrystallization and a more uniformly refined microstructure were obtained at 50% reduction. These results reveal that tailoring the initial reinforcement distribution is an effective strategy for controlling recrystallization and texture evolution in magnesium matrix composites.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2026.06.238

Authors: Yanping Wang, Xihai Li, Lingyu Zhao, Hong Yan, Rongshi Chen

Institutions: University of Science and Technology of China, Chinese Academy of Sciences, Institute of Metal Research, Shenyang Ligong University, Shandong University of Science and Technology

Language: English

Topic: Magnesium Alloys: Properties and Applications

Subfield: Biomaterials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,640

Funders: National Natural Science Foundation of China, Natural Science Foundation of Liaoning Province