About this Abstract |
Meeting |
6th International Congress on 3D Materials Science (3DMS 2022)
|
Symposium
|
6th International Congress on 3D Materials Science (3DMS 2022)
|
Presentation Title |
Study the Initiation of Hot Cracking Phenomenon During the Processes of Laser Welding |
Author(s) |
Guannan Tang, Anthony Rollett |
On-Site Speaker (Planned) |
Guannan Tang |
Abstract Scope |
This work seeks to understand the initiation of hot cracking during laser welding process. In this work, we are presenting an analysis relating the initiation of hot cracking to micro-defects formed at grain boundaries during solidification. A new index of hot cracking susceptibility was derived out of this and was used to evaluate the susceptibility rank of 12 alloys. The ranking result agrees well with experimental measurements from the literature. Moreover, a hot cracking model was established based upon this analysis to predict local micro-defects coalescence tendency and quantify it as the local susceptibility of hot cracking initiation. This approach used a combined Thermal Lattice Boltzmann-cellular automaton (TLB-CA) code to simulate thermal distribution and microstructure evolution. The associated thermal micromechanical fields were analyzed with a spectral code called Micromechanical Analysis of Stress-Strain Inhomogeneities with Fourier transforms (MASSIF). Validation of the results was made through Dynamic X-ray Radiography (DXR) data. |
Proceedings Inclusion? |
Definite: Other |