On the limitations of Volumetric Energy Density as a design parameter for Selective Laser Melting
On the limitations of Volumetric Energy Density as a design parameter for Selective Laser Melting
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DOI：
10.1016/j.matdes.2016.10.037
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发表时间：
2017-01-05
影响因子：
8.4
通讯作者：
Schoenung, Julie M.
中科院分区：
文献类型：
--
作者：
Bertoli, Umberto Scipioni;Wolfer, Alexander J.;Schoenung, Julie M.
能量密度通常用作比较在不同沉积参数组（例如，激光功率、扫描速度、层厚度等）。我们简要回顾了与输入参数标度关系相关的316L不锈钢（SS）增材制造的现有文献。从以前发表的工作，我们确定了一系列的体积能量密度（VED）值，应导致沉积的完全致密的部分。为了证实这些数据，我们设计了一系列的实验，以调查的可靠性VED作为一个设计参数，通过比较单轨道的316 L SS沉积与可变的沉积参数。我们的研究结果表明，VED作为一个设计参数来描述SLM的适用性被限制在一个狭窄的频带，这是由于这个参数无法捕捉到复杂的物理熔池的适用性。当使用VED作为SLM的设计参数时应谨慎。(C)2016爱思唯尔有限公司版权所有
Energy density is often used as a metric to compare components manufactured with Selective Laser Melting (SLM) under different sets of deposition parameters (e.g., laser power, scan speed, layer thickness, etc.). We present a brief review of the current literature on additive manufacturing of 316L stainless steel (SS) related to input parameter scaling relations. From previously published work we identified a range of Volumetric Energy Density (VED) values that should lead to deposition of fully dense parts. In order to corroborate these data, we designed a series of experiments to investigate the reliability of VED as a design parameter by comparing single tracks of 316L SS deposited with variable deposition parameters. Our results show the suitability of VED as a design parameter to describe SLM to be limited to a narrow band of applicability, which is attributed to the inability of this parameter to capture the complex physics of the melt pool. Caution should be exercised when using VED as a design parameter for SLM. (C) 2016 Elsevier Ltd. All rights reserved.