The grain boundary network in a 304 stainless steel can be controlled by grain boundary engineering (GBE). The total length proportion of Σ3n coincidence site lattice (CSL) boundaries was increased to more than 70%, and the large size highly twinned grain-cluster microstructure formed through the treatment of GBE. Stress corrosion cracking (SCC) susceptibility of 304 stainless steel was evaluated through C-ring specimen tests conducted in acidified boiling 20%NaCl solution. Based on the characterization by SEM, EBSD and OM, it was found that the large grain-clusters associated with many interconnected Σ3-Σ3-Σ9 and Σ3-Σ9-Σ27 triple junctions produced by GBE arrest the IGSCC cracks and improve the resistance to IGSCC.
YAN Shuang
. EFFECT OF GRAIN BOUNDARY NETWORK ON THE INTERGRANULAR STRESS CORROSION CRACKING OF 304 STAINLESS STEEL[J]. Acta Metall Sin, 2011
, 47(7)
: 939
-945
.
DOI: 10.3724/SP.J.1037.2011.00184
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