| Issue |
MATEC Web Conf.
Volume 242, 2018
International Conference on Advanced Functional Materials and Composites (ICAFMC2018)
|
|
|---|---|---|
| Article Number | 01022 | |
| Number of page(s) | 4 | |
| Section | Carbon Composites | |
| DOI | https://doi.org/10.1051/matecconf/201824201022 | |
| Published online | 05 December 2018 | |
Finite element simulation and microstructure analysis of nickel based alloy for additive manufacturing
1 School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
2 Department of Oral Microbiology, Faculty of Dentistry, Mahidol University, Taiyuan 030051, China
a Corresponding author: peace666@126.com
In this paper, the finite element simulation of GH4169 high temperature alloy by selective laser melting was carried out, and the microstructure was analyzed by experiments. The results show that the shape of the temperature field cloud formed by the laser heat source is different from the shape of the theoretical model, but is in the shape of the ellipse. The temperature gradient at the front end of the molten pool is larger than that of the back end of the molten pool, and the isotherm of the front end of the molten pool is more intensive. The temperature of the substrate is less affected by the temperature gradient. The temperature gradient of the front end of the melting pool is larger than the back end of the molten pool, and the temperature field of selective laser melting is like a meteor with trailing tail. In the laser heat source, the temperature isotherm is the most dense and the temperature gradient is maximum. The relative effect of mechanical properties of δ phase is very complex. When the phase is precipitated by widmanstatten structure, it is easy to produce stress concentration as a source of cracks
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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