Experimental determination of cooling rates in selectively laser-melted eutectic Al-33Cu
Experimental determination of cooling rates in selectively laser-melted eutectic Al-33Cu
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DOI：
10.1016/j.addma.2018.05.034
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发表时间：
2018-08-01
影响因子：
11
通讯作者：
Kosiba, Konrad
中科院分区：
文献类型：
--
作者：
Pauly, Simon;Wang, Pei;Kosiba, Konrad
通过对Al-33 Cu（wt.%）共晶合金的激光选择性熔化（SLM）工艺，实验确定了SLM的冷却速率。合金采用产生相同体积能量密度的两个不同参数集来生产样品。根据Al和CuAl_2层片的平均间距，估算了SLM试样不同部位的冷却速率。在高激光功率（300 W）下，冷却速率为10（4）K/s，在较低激光功率（200 W）下，冷却速率为10（5）K/s。本方法被证明是有用的探索增材制造的金属部件的热历史。
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 10(4) K/s and at the lower laser power (200 W) to 10(5) K/s. The present approach proves to be useful for exploring the thermal history of additively manufactured metallic components.