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Simulation of laser impact welding for dissimilar additively manufactured foils considering influence of inhomogeneous microstructure
- Source :
- Materials & Design, Vol 198, Iss, Pp 109372-(2021)
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Introduced is a comprehensive numerical modeling framework that includes microstructure when simulating the laser impact welding (LIW) of metals to study the transient phenomena that occur during weld formation. Such transient phenomena include evolution of shear stresses, plastic strains, thermal response, and material jetting. Inhomogeneous microstructures for two dissimilar foils (aluminum 1100 and stainless steel 304) are first predicted using the Dynamic Kinetic Monte Carlo (KMC) method to simulate laser-based powder bed fusion (PBF-LB) additive manufacturing (AM). These microstructures are subsequently incorporated into an Eulerian finite element (FE) simulation of the LIW process, enabling prediction of grain elongations that result from the varying yield surfaces, stacking fault energies, and grain-boundary sliding effects. Trends in the predicted microstructure deformation patterns show strong agreement with those from experimental images in the literature. Compared to existing homogeneous models, the new framework with inhomogeneous AM microstructure reveals higher collision velocities at the weld interface, resulting in increased plastic strain rates, greater plastic heat dissipation, and increased material jetting with higher jet temperatures. The framework allows for new opportunities to study correlations between grain topography (as well as polycrystalline metal texture) and the transient process phenomena occurring at the impact weld interface.
- Subjects :
- Materials science
Yield (engineering)
Additive manufacturing
02 engineering and technology
Welding
Plasticity
010402 general chemistry
01 natural sciences
law.invention
law
lcsh:TA401-492
General Materials Science
Kinetic Monte Carlo
Texture (crystalline)
Composite material
Impact welding
Finite element numerical modeling
Mechanical Engineering
021001 nanoscience & nanotechnology
Microstructure
0104 chemical sciences
Shear (sheet metal)
Mechanics of Materials
lcsh:Materials of engineering and construction. Mechanics of materials
Deformation (engineering)
0210 nano-technology
Microstructure prediction
Subjects
Details
- ISSN :
- 02641275
- Volume :
- 198
- Database :
- OpenAIRE
- Journal :
- Materials & Design
- Accession number :
- edsair.doi.dedup.....9de8d8312d628aa9dfd8fc359780e816