Oxide inclusions that form in low alloy steel weld metal influence the microstructure development. This work investigates the mechanisms of inclusion coarsening in low alloy steel melts considering fluid flow in the melt. Controlled isothermal localised melting experiments on low alloy steel weld metal samples showed rapid inclusion coarsening as a result of collision and coalescence. The average diameter of the inclusions increased rapidly, resulting in a decrease in the overall number density of the inclusions as a function of holding time. These results are examined to understand weld metal inclusion formation in the presence of convective fluid flow. Investigation of the feasibility of oxide formation showed no oxidation reaction in the solid state.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics