TY - JOUR
T1 - Distinct phase-selective corrosions of Ti-48Al alloy in aqueous electrolyte and molten salt
AU - Huang, Xiaohu
AU - Sankara Rama Krishnan, P. S.
AU - Kuah, Kai Xiang
AU - Meng, Tzee Luai
AU - Ng, Yee
AU - Liu, Hailong
AU - Teo, Siew Lang
AU - Karyappa, Rahul
AU - Lin, Ming
AU - Ngo, Andrew Chun Yong
AU - Ramanujan, R. V.
AU - Blackwood, Daniel J.
AU - Liu, Hongfei
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2024/5/1
Y1 - 2024/5/1
N2 - Corrosion of Ti-48Al alloys, consisting of γ-TiAl phase and α2-Ti3Al phase in lamellar structures, has been studied by electrochemical method at room temperature and molten salt method at elevated temperatures, respectively. Morphological, crystallographic, and microstructural studies provide direct evidence for γ-phase selective etching by the electrochemical corrosion at room temperature. In contrast, α2-phase selective etching of the Ti-48Al alloy occurred during molten salt corrosion, alongside α2-to-γ phase transformations at elevated temperatures. The distinct corrosion behaviors have been discussed and attributed to different chemical and physical properties between γ-TiAl and α2-Ti3Al phases within the Ti-48Al alloy.
AB - Corrosion of Ti-48Al alloys, consisting of γ-TiAl phase and α2-Ti3Al phase in lamellar structures, has been studied by electrochemical method at room temperature and molten salt method at elevated temperatures, respectively. Morphological, crystallographic, and microstructural studies provide direct evidence for γ-phase selective etching by the electrochemical corrosion at room temperature. In contrast, α2-phase selective etching of the Ti-48Al alloy occurred during molten salt corrosion, alongside α2-to-γ phase transformations at elevated temperatures. The distinct corrosion behaviors have been discussed and attributed to different chemical and physical properties between γ-TiAl and α2-Ti3Al phases within the Ti-48Al alloy.
KW - Electrochemical Corrosion
KW - Molten Salt Corrosion
KW - Phase-selected etching
KW - Pitting
KW - Ti-48Al Alloy
UR - http://www.scopus.com/inward/record.url?scp=85188629008&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85188629008&partnerID=8YFLogxK
U2 - 10.1016/j.corsci.2024.111997
DO - 10.1016/j.corsci.2024.111997
M3 - Article
AN - SCOPUS:85188629008
SN - 0010-938X
VL - 231
JO - Corrosion Science
JF - Corrosion Science
M1 - 111997
ER -