The mechanism of formation of an Mn-depleted zone (MDZ) near the inclusion in a steel weld was elucidated based on quantification of MDZ depth and thermodynamic calculations. The effective inclusion phase for intragranular nucleation, which increased as a function of increasing chemical driving force, satisfied the requirements for presence of a considerable quantity of Mn in the phase, and a lower precipitation temperature compared with the solidus temperature of the matrix.
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This work was supported by the Fundamental R&D Program for the Core Technology of Materials (K0006030, Development of joining materials by the control of phase transformation and critical energy) funded by the Ministry of Trade, Industry & Energy (MI, Korea).
Manuscript submitted February 4, 2014.
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Kang, Y., Han, K., Park, J.H. et al. Mn-Depleted Zone Formation in Rapidly Cooled High-Strength Low-Alloy Steel Welds. Metall Mater Trans A 45, 4753–4757 (2014). https://doi.org/10.1007/s11661-014-2470-3
- Weld Metal
- Solidus Temperature
- Steel Weld
- High Resolution Electron Microscopy