Selective laser remelting of an additive layer manufacturing process on AlSi10Mg

By Bin Liu, Bao-Qiang Li, Zhonghua Li. Results in Physics, 2019

138 citations recorded by the source corpus.

Abstract AlSi10Mg samples were fabricated by selective laser melting (SLM) using meander strategy and remelting strategy to gain insight into the variation of the microstructures and microhardness as well as the surface morphology, characteristics of molten pool, relative density and phase identification. The results show that the remelting strategy in SLM improves the surface quality (9.94 μm) and relative density (99.3%) of AlSi10Mg, at the same time, the shallower melt pool also is attained by remelting step due to the higher thermal conductivity and the reflectivity of laser in solid than powder. The shallower melt pool for second scan remelts the columnar grain near the top of the original melt pool and the solidifies in the same way with as original melt pool, resulting in finer equiaxed grains. The finer microstructures with supersaturated α-Al improve the hardness performance of SLMed samples from 117.7 HV0.3 to 121.6 HV0.3.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/1ee16aec98880742d00f60731affac81bab0bd80

Citations in the corpus

• The microstructure of a selective laser melting (SLM)-fabricated NiTi shape memory alloy with superior tensile property and shape memory recoverability (2020, unknown): “Recently, we used a stripe rotation scanning strategy [16–18] optimizing the intraformational laser scanning length and interformational laser scanning direction to fabricate a SLM-fabricated NiTi alloy.”