Additive manufactured AlSi10Mg samples using Selective Laser Melting (SLM): Microstructure, high cycle fatigue, and fracture behavior
Additive manufactured AlSi10Mg samples using Selective Laser Melting (SLM): Microstructure, high cycle fatigue, and fracture behavior
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DOI：
10.1016/j.matdes.2011.07.067
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发表时间：
2012-02-01
影响因子：
8.4
通讯作者：
Buchbinder, Damien
中科院分区：
文献类型：
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作者：
Brandl, Erhard;Heckenberger, Ulrike;Buchbinder, Damien
为了通过增材层制造生产系列部件，疲劳性能可能是关键属性。研究了AlSi 10 Mg合金的微观组织、高周疲劳性能和断裂行为。这些样品是通过一种称为选择性激光熔化（SLM）的特殊粉末床工艺制造的，然后进行加工。在不加热（30 ℃）和加热（300 ℃）构建平台的情况下以及在不同方向（0度、45度、90度）上制造91个样品。在峰值硬化（T6）和竣工条件下对样本进行测试。Wohler曲线由Weibull分布插值。通过实验设计、相关分析和边缘均值图对结果进行统计分析。研究表明，后热处理对疲劳抗力的影响最大，而成型方向对疲劳抗力的影响最小。然而，与标准DIN EN 1706相比，样品的抗疲劳性很高。300摄氏度平台加热和峰值硬化的组合是增加抗疲劳性并中和0度、45度和90度方向的疲劳寿命差异的有价值的方法。(C)2011爱思唯尔有限公司版权所有。
In order to produce serial parts via additive layer manufacturing, the fatigue performance can be a critical attribute. In this paper, the microstructure, high cycle fatigue (HCF), and fracture behavior of additive manufactured AlSi10Mg samples are investigated. The samples were manufactured by a particular powder-bed process called Selective Laser Melting (SLM) and machined afterwards. 91 samples were manufactured without (30 degrees C) and with heating (300 degrees C) of the building platform and in different directions (0 degrees, 45 degrees, 90 degrees). Samples were tested in the peak-hardened (T6) and as-built condition. The Wohler curves were interpolated by a Weibull distribution. The results were analysed statistically by design of experiments, correlation analysis, and marginal means plots. The investigations show that the post heat treatment has the most considerable effect and the building direction has the least considerable effect on the fatigue resistance. The fatigue resistance of the samples, however, is high in comparison to the standard DIN EN 1706. The combination of 300 degrees C platform heating and peak-hardening is a valuable approach to increase the fatigue resistance and neutralize the differences in fatigue life for the 0 degrees, 45 degrees, and 90 degrees directions. (C) 2011 Elsevier Ltd. All rights reserved.