Modulating fracture toughness through processing-mediated mesostructure in additively manufactured Al-12Si alloy

• Main Authors: Jamshidian, Mostafa, Promoppatum, Patcharapit, Ramamurty, Upradrasta, Jhon, Mark Hyunpong
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Article
• Language: English
• Published: 2022
• Subjects: Engineering::Mechanical engineering; Engineering::Materials; Fracture Toughness; Laser Powder Bed Fusion
• Online Access: https://hdl.handle.net/10356/162655
• Institution: Nanyang Technological University

Al-12Si alloy processed through additive manufacturing exhibits a complex hierarchical structure. At the mesoscale, its melt pool boundaries constitute a network of weak interfaces that provides preferred pathways for crack kinking, leading to both marked anisotropy and apparent enhancement in the f...