研究了Ti811(Ti-8Al-lMo-lV)和TCA(Ti-6Al-4V)两种钛合金对热盐应力腐蚀(HSSC)的敏感性.结果表明:Ti811合金对HSSC非常敏感,在相同条件下其热盐应力腐蚀临界应力(σ_(HSSC))明显低于TC4合金,且低于同温度的蠕变强度,而TC4合金的σ_(HSSC)高于同温度的蠕变强度;两种合金在HSSC暴露过程中,明显遭受到盐腐蚀,腐蚀产生的氢扩散到基体中,致使合金发生脆化,从而降低合金的室温塑性.
The susceptibility to hot-salt stress corrosion ( HSSC ) of Ti811 ( Ti-8Al-lMo-lV ) and TC4 ( Ti-6Al-4V )alloys was investigated. The results showed that Ti811 alloy was susceptible to HSSC ,and its critical stress of HSSC (σ_(HSSC) ) was lower apparently than that of TCA alloy. The σ_(HSSC) of Ti811 alloy was lower than its creep strength at the same temperature, but the σ_(HSSC) of TC4 alloy was higher than its creep strength at the same temperature. The two alloys suffered extensively from salt corrosion, while the formed hydrogen diffused into the titanium alloy matrix,resulting in embrittlement and thereby reduction of room temperature ductility of the alloys.
参考文献
| [1] | Petersen V C.Hot-salt stress-corrosion of titanium:a review of the problem and methods for improving the resistance of titanium[J] Journal of Metals,1971,23(4):40. |
| [2] | Bideout S P,Ondrejcin R S,Louthan M R Jr,et al.The role of moisture and hydrogen in hot-salt cracking of titanium alloys[A].Staehle R W,Forty A J,van Rcoyon D.Proceedings of Conference on Fundamental Aspects of Stress Corrosion Cracking[C].Houston:NACE,1967.650. |
| [3] | Myers J R,Hall J A.Hot salt stress corrosion cracking of titanium alloys:an improved model for the mechanism[J].Corrosion,1977,33 (7):252. |
| [4] | Sinigaglia D,Taccani G,Vicentini B.Hot-salt-stress-corrosion cracking of titanium alloys[J].Corrosion Science,1978,18(9):781. |
| [5] | Ridcout S P,Ondrejcin R S,Louthan M R Jr.Hot-salt stress corresion cracking of titanium alloys[A].Jaffee R I,Promisel N E.International Conference on Titanium[C].London:Pergamon Press,1970.307. |
| [6] | Gray H R.Role of Hydrogen in hot-salt stress-corrosion of a titanium alloy[DB-OL].http://ntrs,nasa.gov/search,jsp? Ns= Publication Year%7C0&N =4294924092,2009 -04-10. |
| [7] | Gray H R.Hot-salt stress-corrosion of titanium alloys:generation of hydrogen and its embrittling effect[DB-OL].http://www.stormingmedia,us/87/8742/A874283,html,2009 -04-10. |
| [8] | Mahoney M W,Tetelman A S.The effect of microstructure on the hot salt stress corrosion susceptibility of titanium alloys[J].Metallurgical Fransactions,1976,7 A:1549 |
| [9] | 虞炳西,张绥生,万晓景.Ti-6Al-4V合金的热盐应力腐蚀[J].金属学报,1982,18(3):264. |
| [10] | 李少强,雷家蜂,刘羽寅,等.Ti811合金的热盐应力腐蚀[J].稀有金属材料与工程,2008,37(增刊3):750. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%