Effect of the Boundary Orientation of Melt Pool on Mechanical Property and Fracture Path in Selective-Laser-Melted AlSi10Mg Alloy

Zihao Jiang; Yayun Li; Hang Luo; Baogang Zhou; Yilong Liang; Yu Liang

doi:10.1007/s12540-022-01199-4

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자료유형: 학술저널

저자정보: Zihao Jiang (Guizhou University) Yayun Li (Guizhou University) Hang Luo (Guizhou University) Baogang Zhou (Guizhou University) Yilong Liang (Guizhou University) Yu Liang (Guizhou University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.12

발행연도: 2022.12

수록면: 2,934 - 2,946 (13page)

DOI: 10.1007/s12540-022-01199-4

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The present work investigated the effect of the boundary orientation of melt pool on the mechanical properties and fracturepath in selective-laser-melted AlSi10Mg alloy. The acquired data are beneficial for understanding the influence of themicrostructure on mechanical properties. During the alloy’s selective laser melting (SLM), the melt pool boundary wasalmost parallel with the scanning direction, and the grains grew along the building direction. When the load-bearing facewas perpendicular to the melt pool boundary, the crack propagation path deflected towards coarse melt pool of the melt poolboundary, reducing the probability of directly crossing the fine melt pool. Otherwise, the cracks would mainly propagatealong the melt pool boundary. In the tensile deformation process, coarse melt pool (CMP) was subjected to higher localstrain than fine melt pool (FMP) and heat-affected zone (HAZ), and the crack propagated or deflected along the CMP inthe melt pool boundary. Therefore, the anisotropy of mechanical properties in SLM AlSi10Mg was mainly ascribed to theCMP density on the load-bearing face. As a weak area, the high proportion of CMP significantly reduced the strength andplasticity of the alloy.

#AlSi10Mg alloy · Selective laser melting · Melt pool boundary · Damage characteristic · Anisotropy · Fracture path

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