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Abstract The pH value of the crack tip solution of both Ti-5Al-2.5Sn and Ti-5Al- 4V under stress corrosion was measured by micro-electrode methol and indi- cator paper method to be 1.7 to 2.0,while the bulk solution of 3.5%wt NaCl- was nearly neutral.The results so obtained are in good agreement with those obtained from the simulation experiment.The propagation of the SCC was observed dynamically by optical microscope and was proved as follows:some mierocraeks first formed in the plastic region in front of the crack tip, then both the main crack and microcracks extended to each other and con joined finally.The fractography of the SCC was examined by SEM.Based on these experimental results,a model for the SCC of titanium alloys is proposed and discussed.
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Received: 25 August 1982
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Cite this article:
Huang Xianya Zhu Zufang Wang Deming (General Research Institute of Non-ferrous Metals;MMI)Hsiao Chimei (Beijing University of Iron and Steel Technology). A STUDY OF THE MECHANISM OF SCC OF TITANIUM ALLOYS. J Chin Soc Corr Pro, 1982, 2(4): 37-44.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1982/V2/I4/37
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