Design and fabrication of Al-Mg bimetallic interface structures via synergistic additive manufacturing and powder hot pressing

TY - JOUR

T1 - Design and fabrication of Al-Mg bimetallic interface structures via synergistic additive manufacturing and powder hot pressing

AU - Wang, Tingjiang

AU - Chen, Qi

AU - Wang, Chan

AU - Wang, Xiebin

AU - Liu, Changmeng

N1 - Publisher Copyright: © 2025 Elsevier Ltd.

PY - 2025/12

Y1 - 2025/12

N2 - The Al-Mg bimetallic structure combines the advantages of both Al and Mg alloys and has attracted significant attention in the design of lightweight components. However, enhancing the bonding strength at the alloy interface remains a critical challenge. In this study, four types of Al-Mg alloy interface structures are designed and fabricated by integrating metallurgical bonding with mechanical interlocking, and their interfacial bonding characteristics are investigated and analyzed. The results indicate that Al-Mg alloy interfaces with lattice structures exhibit better bonding effect compared to the elliptical and anti-trapezoidal suture structures, especially in the case of the gradient BCC lattice structure. The interface with gradient lattice structure exhibits no significant defects, an enlarged element diffusion zone, and a more uniform elemental distribution, all of which contribute to enhanced bonding performance. This study provides effective design strategies and technical support to promote the development of bimetallic interfaces.

AB - The Al-Mg bimetallic structure combines the advantages of both Al and Mg alloys and has attracted significant attention in the design of lightweight components. However, enhancing the bonding strength at the alloy interface remains a critical challenge. In this study, four types of Al-Mg alloy interface structures are designed and fabricated by integrating metallurgical bonding with mechanical interlocking, and their interfacial bonding characteristics are investigated and analyzed. The results indicate that Al-Mg alloy interfaces with lattice structures exhibit better bonding effect compared to the elliptical and anti-trapezoidal suture structures, especially in the case of the gradient BCC lattice structure. The interface with gradient lattice structure exhibits no significant defects, an enlarged element diffusion zone, and a more uniform elemental distribution, all of which contribute to enhanced bonding performance. This study provides effective design strategies and technical support to promote the development of bimetallic interfaces.

KW - Additive manufacturing

KW - Al-Mg bimetallic structure

KW - Lattice structure

KW - Powder hot pressing

KW - Suture structure

UR - https://www.scopus.com/pages/publications/105021250642

U2 - 10.1016/j.mtcomm.2025.114295

DO - 10.1016/j.mtcomm.2025.114295

M3 - Article

AN - SCOPUS:105021250642

SN - 2352-4928

VL - 49

JO - Materials Today Communications

JF - Materials Today Communications

M1 - 114295

ER -