TY - JOUR
T1 - Grain boundary character distribution and its effect on corrosion of Ni–23Cr–16Mo superalloy
AU - Shi, P.
AU - Hu, R.
AU - Zhang, T.
AU - Yuan, L.
AU - Li, J.
N1 - Publisher Copyright:
© 2016 Institute of Materials, Minerals and Mining.
PY - 2017/1/2
Y1 - 2017/1/2
N2 - Grain boundary character distribution (GBCD) of the Hastelloy C2000 alloy (Ni–23Cr–16Mo) and the effect of coincidence site lattice (CSL) grain boundaries on corrosion resistance were examined by electron backscattered diffraction and electrochemical experiments. Various deformation followed by annealing was applied to optimise the GBCD of the alloy. After grain boundary engineering (GBE) treatment, the proportion of CSL boundaries increased from 37.7% to 62.4% and the corrosion current density of the specimens decreased in NaCl solution. The results indicated that GBE treatment is responsible for preferable corrosion resistance due to the increase of the fraction of special low energy grain boundaries with perfect grain boundary atom arrangement after thermomechanical process.
AB - Grain boundary character distribution (GBCD) of the Hastelloy C2000 alloy (Ni–23Cr–16Mo) and the effect of coincidence site lattice (CSL) grain boundaries on corrosion resistance were examined by electron backscattered diffraction and electrochemical experiments. Various deformation followed by annealing was applied to optimise the GBCD of the alloy. After grain boundary engineering (GBE) treatment, the proportion of CSL boundaries increased from 37.7% to 62.4% and the corrosion current density of the specimens decreased in NaCl solution. The results indicated that GBE treatment is responsible for preferable corrosion resistance due to the increase of the fraction of special low energy grain boundaries with perfect grain boundary atom arrangement after thermomechanical process.
KW - Coincidence site lattice (CSL) grain boundaries
KW - Corrosion resistance
KW - Grain boundary character distribution
KW - Hastelloy C2000 superalloy
KW - Thermomechanical processes
UR - https://www.scopus.com/pages/publications/84981717350
U2 - 10.1179/1743284715Y.0000000142
DO - 10.1179/1743284715Y.0000000142
M3 - 文章
AN - SCOPUS:84981717350
SN - 0267-0836
VL - 33
SP - 84
EP - 91
JO - Materials Science and Technology
JF - Materials Science and Technology
IS - 1
ER -