Experimental determination of cooling rates in selectively laser-melted eutectic Al-33Cu

By S. Pauly, Pei Wang, U. Kühn, K. Kosiba. Additive Manufacturing, 2018

162 citations recorded by the source corpus.

Abstract The cooling rates inherent to selective laser melting (SLM) were experimentally determined by processing the eutectic Al-33Cu (wt.%) alloy. Two different parameter sets yielding an identical volumetric energy density were employed to produce the samples. Based on the average spacing of the Al and CuAl2 lamellae, the cooling rates in different parts of the SLM specimens were estimated. At a high laser power (300 W) the cooling rate amounts to 104 K/s and at the lower laser power (200 W) to 105 K/s. The present approach proves to be useful for exploring the thermal history of additively manufactured metallic components.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/305c7f0b97e2a5cfb524f22f55bc9a68613c9adb

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Citations in the corpus

3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting (2019, background): “They observed segregations of Cu particles, which was not the case when the same composition was processed from prealloyed powder [41].”
Recent advances in hot tearing during casting of aluminium alloys (2020, background): “When performing semi-solid tensile tests for AM, a high cooling rate (104-106 K/s [10]) must be simulated owing to its potential significant influence on the measured semi-solid mechanical properties (Section 3.3.1.3).”