摘要
研究了热暴露温度和氢对Ti811合金棒材热盐应力腐蚀(HSSC)性能的影响。结果表明:Ti811合金HSSC性能对暴露温度敏感,在暴露温度低于425℃时,合金无HSSC现象,高于480℃时,合金发生明显HSSC,性能恶化。合金发生HSSC的临界温度为450℃。在HSSC过程中有氢产生,氢优先沿晶界扩散,盐蚀区氢和氧含量高于基体,使材料脆化.
The effects of exposure temperature and hydrogen on the hot salt stress corrosion (HSSC) of Ti811 alloy rod have been studied. The results suggest that its HSSC properties are sensitive to exposure temperature. The alloy has no HSSC phenomenon if the hotsalt exposure temperature is lower than 425℃. If the temperature is higher than 480℃, the alloy has obvious HSSC and its Properties worsen greatly. The critical exposure temperature of HSSC is 450℃. Nascent hydrogen was generated and selectively diffused into the metallic substrate along grain boundary during HSSC process. The contents of hydrogen and oxygen in salt corrosion zone are higher than that in matrix, which resulting in embrittlement.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
1996年第6期23-27,共5页
Rare Metal Materials and Engineering
关键词
热盐
暴露
HSSC
氢
钛合金
腐蚀性
Ti811 alloy
hot salt exposure
HSSC
hydrogen
property