摘要
研究了不同热处理后的Al60Mn13Ti25V2合金的高温氧化行为和氧化膜的纳米力学性能.结果表明:在1000℃下,单纯均匀化热处理合金和热等静压+均匀化热处理的合金均具有良好的恒温抗氧化性能;而在900℃和1000℃条件下,热等静压+均匀化热处理合金的循环氧化性能明显优于单纯均匀化热处理合金的循环氧化性能.其原因为热等静压处理有助于消除合金内部微孔等缺陷,使合金组织的均匀化得到改善,降低氧化膜的热应力对循环氧化的影响.而纳米压入法则显示,Al60Mn13Ti25V2合金生成的氧化膜具有明显的层状结构,这与SEM观察相吻合,并讨论了氧化膜的力学特征.
Al_(60)Mn_(13)Ti_(25)V_2 intermetallic was heat treated by two ways. One was complex treatment of hot isostatic pressing (HIP) at 1 200 ℃ and 173 Mpa for 4 hours following homogenization treatment in vacuum furnace (4×10^(-4) Pa) at 1 100 ℃ for 48 hours. The other way was just homogenization treatment with the same condition. Static temperature and cycle oxidation behavior of the alloy treated by the two ways was studied at 900 ℃ and 1 000 ℃ respectively. The results showed that oxidation resistance was high for the both treated alloy under the condition of static temperature. Under the condition of cycle temperature, however, the oxidation resistance of the HIP treated alloy was much better than that of the simple homogenized treatment. The reason was that the HIP decreased porousness and Mn rich region. Nanoindentation showed that scale of Al_(60)Mn_(13)Ti_(25)V_2 alloy presented obvious layer, and was consistent with SEM, at the same time, the mechanical character of scale was studied.
出处
《吉林化工学院学报》
CAS
2004年第1期112-118,共7页
Journal of Jilin Institute of Chemical Technology
基金
国家基础研究规划资助项目(G19990650)
日本国学术振兴资助项目.
