Statistical analysis of porosity of 17-4PH alloy processed by selective laser melting

2nd International Conference on Design, Materials, and Manufacturing

材料科学;机械制造

Ponnusamy, P.^1,2 ; Masood, S.H.^1 ; Ruan, D.^1 ; Palanisamy, S.^1,2 ; Mohamed, O.A.^1

Faculty of Science, Engineering and Technology, Swinburne University of Technology, VIC

3122, Australia^1

Defence Materials Technology Centre, VIC

3122, Australia^2

关键词: 17-4 PH stainless steel;    Build orientation;    Defocus distance;    Layer by layer;    Layer thickness;    Process parameters;    Selective laser melting;    Taguchi design of experiment;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/220/1/012001/pdf
DOI  :  10.1088/1757-899X/220/1/012001

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Selective Laser Melting (SLM) is a powder-bed type Additive Manufacturing (AM) process, where parts are built layer-by-layer by laser melting of powder layers of metal. There are several SLM process parameters that affect the accuracy and quality of the metal parts produced by SLM. Therefore, it is essential to understand the effect of these parameters on the quality and properties of the parts built by this process. In this paper, using Taguchi design of experiments, the effect of four SLM process parameters namely laser power, defocus distance, layer thickness and build orientation are considered on the porosity of 17-4PH stainless steel parts built on ProX200 SLM direct metal printer. The porositywas found to be optimum at a defocus distance of -4mm and a laser power of 240 W with a layer thickness of 30 μm and using vertical build orientation.