Influence of small particles inclusion on selective laser melting of Ti-6Al-4V powder

4th International Conference on Mechanical, Materials and Manufacturing

材料科学;机械制造

Gong, Haijun^1 ; Dilip, J.J.S.^2 ; Yang, Li^2 ; Teng, Chong^3 ; Stucker, Brent^3

Georgia Southern University, Statesboro

GA

30460, United States^1

University of Louisville, Louisville

KY

40292, United States^2

3DSIM LLC, Park City

UT

84098, United States^3

关键词: Additive manufacturing process;    Fatigue performance;    Laser energy absorption;    Microstructural analysis;    Parameter optimization;    Powder morphology;    Process development;    Selective laser melting;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/272/1/012024/pdf
DOI  :  10.1088/1757-899X/272/1/012024

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The particle size distribution and powder morphology of metallic powders have an important effect on powder bed fusion based additive manufacturing processes, such as selective laser melting (SLM). The process development and parameter optimization require a fundamental understanding of the influence of powder on SLM. This study introduces a pre-alloyed titanium alloy Ti-6Al-4V powder, which has a certain amount of small particles, for SLM. The influence of small particle inclusion is investigated through microscopy of surface topography, elemental and microstructural analysis, and mechanical testing, compared to the Ti-6Al-4V powder provided by SLM machine vendor. It is found that the small particles inclusion in Ti-6Al-4V powder has a noticeable effect on extra laser energy absorption, which may develop imperfections and deteriorate the SLM fatigue performance.