Metall. Res. Technol.
Volume 118, Number 6, 2021
|Number of page(s)||9|
|Published online||21 October 2021|
On the mechanisms involved in the tensile strength of a dissimilar Ti6Al4V/316L laser welded assembly
Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS, Université de Bourgogne Franche-Comté, 12 rue de la Fonderie, 71200 Le Creusot, France
2 Laser Rhône-Alpes, 49–51 Boulevard Paul Langevin, 38600 Fontaine, France
* e-mail: firstname.lastname@example.org
Accepted: 28 September 2021
The aim of the present work is to analyze the thermomechanical behavior of dissimilar laser seams by means of FE modeling. The case of a Ti6Al4V/316L assembly with vanadium insert was considered. Effective mechanical properties of the main materials and cords were first estimated from NHT measurements. Modeling of the double pass laser welding process was performed first by considering shrinking of the two weld seams during manufacturing, to get the residual stress state in the welded assembly. Modeling of the tensile test was performed in a second step to study the assembly behavior during loading. In these modeling results, the mesh was the cross-section of the micrograph of the assembly itself. The corresponding stress/strain curve was calculated and results were reported for the residual stress state after manufacturing as well as a stress state close to the Ultimate Tensile Strength.
Key words: laser / dissimilar welding / FEM modeling / residual stresses / tensile load / Ti6Al4V / 316L stainless steel / vanadium insert
© A. Mannucci et al., Published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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