Metallurgical aspects involved in Selective Laser Melting

5th International Conference Recent Trends in Structural Materials

Buchmayr, B.^1 ; Panzl, G.^1

Montanuniversitaet Leoben, Department of Metal Forming, Leoben

A-8700, Austria^1

关键词: Defect formation;    Dissimilar joints;    High cooling rates;    Laser weldability;    Micro-structural;    Process parameters;    Selective laser melting;    Welding technology;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/461/1/012008/pdf
DOI  :  10.1088/1757-899X/461/1/012008

来源: IOP

【 摘 要 】

Additive manufacturing using Selective Laser Melting (SLM) offers several advantages for industrial applications and has motivated many scientist and industrial R&D colleagues to add more and more innovations. Although the principles are well known, only a small number of materials have found a significant usage, others have shown serious problems during fabrication. In the paper, the influencing process parameters, the interactions of important mechanisms and the microstructural based assessment of laser weldability as well as the appearance of defect formations are considered in detail in order to understand the physical limits and to highlight the peculiarities of the SLM-process. Many problems can be solved using the lessons learned in welding technology. On one side, the high cooling rate and strong undercooling of SLM-process is quite positive to fabricate dissimilar joints and on the other side, residual stresses and distortion may be a challenge.