摘要
研究了新型阻燃钛合金Ti14锻态、热处理态、300℃热暴露不同时间的组织和室温拉伸性能。结果表明,随热暴露时间的延长,合金强度出现较大起伏,而塑性明显下降。微观组织分析表明,在热暴露过程中,Ti2Cu相发生融合、长大,条状Ti2Cu相沿晶界析出,在晶界形成连续析出物带,导致合金塑性下降。在本试验条件下,热暴露过程中微观组织的变化是影响Ti14合金热稳定性的主要因素。
Microstructure and tensile properties at room temperature of Til4, a new type burn-resistant titanium alloy, after forging, heat treating and thermal exposuring at 300 ℃ for different time were investigated. The results show that, with increasing the thermal exposure time, the strength has significant fluctuation, and the plasticity decreases remarkably. The microstructure observations indicate that,during thermal exposure,the Ti2Cu phase merges and grows up, and strip- like Ti2Cu phase precipitates along the grain boundaries and ultimately forms continuous precipitation band, leading to decrease of the alloy＇s plasticity. The main reason influencing the thermal stability of Til4 alloy is the variation of micro-structure during thermal exposure.
出处
《金属热处理》
CAS
CSCD
北大核心
2008年第11期32-35,共4页
Heat Treatment of Metals
基金
重大基础研究前期研究专项项目(2005CCA06400)
国家“973”项目(2007CB613807)
关键词
阻燃钛合金
TI14合金
热暴露
微观组织
力学性能
burn resistant titanium alloy
Ti14 alloy
thermal exposure
microstructure
mechanical property
