Ti-679合金热盐应力腐蚀行为

中国腐蚀与防护学报

1983, Vol. 3

Issue (1): 41-45

研究报告

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Ti-679合金热盐应力腐蚀行为

虞炳西;张绥生;万晓景

中国科学院金属研究所;中国科学院金属研究所;中国科学院金属研究所

ON HOT SALT STRESS CORROSION CRACKING OF TITANIUM ALLOY Ti-679

Yu Bingxi Zhang Suisheng and Wan Xiaojing(Institute of Metal Research; Academia Sinica)

全文: PDF(422 KB)

摘要: 在350～500℃范围内研究了Ti-679合金的热盐应力腐蚀性能。实验表明合金的显微组织对热盐应力腐蚀的敏感性有很大的影响,在相同的热暴露条件下α+β相区热处理试样的临界应力比β相区热处理的要高。试验结果也表明,表面存在压应力的试样的临界应力高于无压应力者。用离子探针对断口表而进行的测定显示出在裂纹中有氢的大量富集,这表明钛合金在受热盐应力腐蚀过程中所产生的并随后被吸收的氢是开裂的主要原因。

Abstract：It has been proved that most of the titanium alloys are susceptible to the so-called hot salt stress corrosion cracking under the combined action of high temperature, halide salt and stresses.In this paper the susceptibility of hot salt stress corrosion cracking of titanium alloy Ti-679 was investigated in the temperature range of 350～500°C.Experimental studies show that the microstructure of the alloy has pronounced effect on the susceptibility of H.S.S.C.C.It was shown that the threshold stress for H.S.S.C.C.of the specimens with α+β annealed structure was higher than that of the specimens with β annealed structure under the same hot exposure conditions.Experimental results also proved that the threshold stress of the specimens with compressive stress on the surface was higher than that of the specimens without it.Ion microprobe scanning analyses on the fractured surface showed that hydrogen was greatly concentrated at the crack surface and that hydrogen produced during the stress corrosion of titanium alloy by halide salt and subsequently absorbed by the alloy was responsible for cracking.

收稿日期: 1983-02-25

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引用本文:

虞炳西;张绥生;万晓景. Ti-679合金热盐应力腐蚀行为[J]. 中国腐蚀与防护学报, 1983, 3(1): 41-45.
. ON HOT SALT STRESS CORROSION CRACKING OF TITANIUM ALLOY Ti-679. J Chin Soc Corr Pro, 1983, 3(1): 41-45.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1983/V3/I1/41

[1] 虞炳西,张绥生,万晓景,金属学报,18,3(1982)
[2] 李东,IM1679钛合金,中国科学院金属研究所内部资料,(1973)
[3] Aerospace structural Metals Handbook, 2, code 3711, 31 (1970)
[4] H. R. Gray, NASA TN D-6188 (1971)
[5] J. R. Myers and J. A. Hall, Corrosion, 33, 7, 252(1977)

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