| Autor: |
Palaparti, D. P. Rao, Vijayanand, V. D., Mariappan, K., Ganesan, V., Reddy, G. V. Prasad, Nagesha, A. |
| Zdroj: |
Journal of Materials Engineering & Performance; Nov2024, Vol. 33 Issue 22, p12191-12202, 12p |
| Abstrakt: |
The effect of two varying strain levels (3 and 5%) produced by cold rolling and two solution-annealing heat treatment temperatures (1173 and 1273 K) on the evolution of low-energy configured coincident site lattice (CSL) boundaries in a 22-mm-thick 316LN stainless steel plate was investigated. A simple single-step strain-annealing approach was adopted to maximize the CSL boundaries and to obtain grain boundary-engineered (GBE) microstructure. The low-Σ CSL boundaries up to Σ ≤ 29b were quantified according to Brandon criteria for all the GBE-processed conditions and compared with the as-received condition. It was observed that the fraction of Σ3 and Σ9 boundaries saturated beyond deviation of 2° from their ideal misorientation based on Brandon criteria for most of the GBE-processed conditions. The prevalence of prolific twinning which usually occurs at triple boundary junctions was studied by mapping the nature of triple boundary junction (TBJ) segments and by estimating the relative distribution of Σ3, Σ9 and Σ27 boundaries. The extent of strain-induced boundary migration (SIBM) mechanism which is a prerequisite phenomenon for prolific twinning was assessed using electron backscatter diffraction (EBSD)-based kernel average misorientation (KAM) and grain average misorientation (GAM) mapping. The interdependence between KAM and GAM parameters with respect to the evolution of CSL boundaries was evaluated. The corrosion properties have been evaluated by estimating the degree of sensitization (% DOS) in all the GBE microstructures. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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