Design of experiments approach in AZ31 powder selective laser melting process optimization

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• 作者：Andrzej Pawlak ; ^{andrzej.p.pawlak@pwr.edu.pl" class="auth_mail" title="E-mail the corresponding author} ; Maria Rosienkiewicz ; Edward Chlebus
• 关键词：Selective laser melting ; Magnesium alloy ; Design of experiments ; Additive manufacturing ; Process optimization
• 刊名：Archives of Civil and Mechanical Engineering
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：17
• 期：1
• 页码：9-18
• 全文大小：2384 K

文摘

Additive manufacturing (AM) technologies are used to produce objects from a wide variety of materials. Technologies that enable processing of metal engineering materials such as selective laser melting have become particularly important. The group of materials processed in this technology comprises stainless steel, CoCr, titanium and aluminum alloys and is continuously expanding to include new materials.

The results of studies into AZ31 magnesium powder selective laser melting process optimization are presented in this paper. Optimization was aimed at minimizing the melted material porosity and determining the influence of and correlations between the analyzed process parameters. Design of experiments (DOE) approach was used, specifically full factorial design for three factors and rotatable design for two factors. Satisfactory porosity values were obtained in the <0.5% range. The results were used to prepare a mathematical model for the resulting porosity depending on the parameters used. Additionally, it was shown that information on linear energy density and scan velocity is not sufficient to describe the SLM process, and that it is necessary to provide detailed values of component parameters.