A Monte Carlo model for 3D grain evolution during welding

Rodgers, Theron M.; Mitchell, John A.; Tikare, Veena

doi:10.1088/1361-651x/aa7f20

A Monte Carlo model for 3D grain evolution during welding

Journal Article · 04 August 2017 · Modelling and Simulation in Materials Science and Engineering

DOI:https://doi.org/10.1088/1361-651x/aa7f20· OSTI ID:1374751

^[1]; Mitchell, John A. ^[1]; Tikare, Veena ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Welding is one of the most wide-spread processes used in metal joining. However, there are currently no open-source software implementations for the simulation of microstructural evolution during a weld pass. Here we describe a Potts Monte Carlo based model implemented in the SPPARKS kinetic Monte Carlo computational framework. The model simulates melting, solidification and solid-state microstructural evolution of material in the fusion and heat-affected zones of a weld. The model does not simulate thermal behavior, but rather utilizes user input parameters to specify weld pool and heat-affect zone properties. Weld pool shapes are specified by Bezier curves, which allow for the specification of a wide range of pool shapes. Pool shapes can range from narrow and deep to wide and shallow representing different fluid flow conditions within the pool. Surrounding temperature gradients are calculated with the aide of a closest point projection algorithm. Furthermore, the model also allows simulation of pulsed power welding through time-dependent variation of the weld pool size. Example simulation results and comparisons with laboratory weld observations demonstrate microstructural variation with weld speed, pool shape, and pulsed-power.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1374751

Report Number(s):: SAND-2017-8231J; 655911

Journal Information:: Modelling and Simulation in Materials Science and Engineering, Vol. 25, Issue 6; ISSN 0965-0393

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties Rodgers, Theron M.; Lim, Hojun; Brown, Judith A. JOM, Vol. 72, Issue 1 https://doi.org/10.1007/s11837-019-03808-x	journal	October 2019
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36 MATERIALS SCIENCE
97 MATHEMATICS AND COMPUTING
welding
grain growth
Potts Monte Carlo
solidification

A Monte Carlo model for 3D grain evolution during welding

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