Distortion prevention of axisymmetric parts during laser metal deposition
| Autor: | Artur Vildanov, Konstantin Babkin, I.K. Topalov, Sergei Ivanov, Pavel A. Golovin |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
History Materials science Shell (structure) 02 engineering and technology Flange 021001 nanoscience & nanotechnology Residual Computer Science Applications Education 020901 industrial engineering & automation Residual stress Distortion Deposition (phase transition) Composite material 0210 nano-technology Axial symmetry Shrinkage |
| Zdroj: | Journal of Physics: Conference Series. 1109:012065 |
| ISSN: | 1742-6596 1742-6588 |
| DOI: | 10.1088/1742-6596/1109/1/012065 |
| Popis: | One of the main problem of large parts manufacturing using laser metal deposition (LMD) is the high residual distortion. Effects of layer-by-layer evolution of stresses and strains was studied by finite-element simulation. It was shown that distortion of axially symmetrical parts can be successfully predicted by the developed simulation procedure. Required dimensional accuracy of additively manufactured parts can be achieved by the optimization of deposited part size and shape in order to compensate volume shrinkage during layers solidification. The corresponding simulation procedure was developed and validated. Another major problem is prevention of distortion during deposition of thick flange on the surface of thin shell structures. In this case the following procedure was proposed and studied: on the first step spacer ring introduces in the shell, then deposition of the flange is carried out and on the last stage whole structure is heat treated in order to remove residual stresses. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|