Open AccessROLE OF HYDROGEN CHLORIDE IN HOT-SALT STRESS CORROSION CRACKING OF TITANIUM- -ALUMINUM ALLOYS.
Author(s) -
R.S. Ondrejcin,
M R Louthan Jr
Publication year - 1967
Language(s) - English
Resource type - Reports
DOI - 10.2172/4549508
Subject(s) - stress corrosion cracking , anhydrous , materials science , titanium , aluminium , metallurgy , corrosion , cracking , chloride , salt (chemistry) , hydrogen , hydrogen chloride , stress (linguistics) , environmental stress fracture , inorganic chemistry , chemistry , composite material , linguistics , philosophy , organic chemistry
The reactions of titanium-aluminum alloys with anhydrous HC1 gas were studied, and the reaction products were found to be TiC12, TiC13, TiC14, A12C16, and H2. These products are considered to be intermediates in the hot-salt stress corrrosion cracking of titanium-aluminum alloys. These products are not normally identified because they oxidize and hydrolyze in the presence of oxygen, moisture, and heat. Fractographic examination of Ti-8A1-1Mo-1V specimens cracked by hot salt and HC1 showed the same fracture mechanism in both cases mechanical rupture accompanied by dislocation movement. It is proposed that stress-sorption is the mechanism of cracking, and that atomic hydrogen is the species sorbed.
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