摘要
利用余氏固体与分子经验电子理论和程氏改进的TFD理论计算了Ti-4.5Al-5Mo-1.5Cr与Ti-6Al-4V两种合金的相空间及其异相界面价电子结构;利用价电子结构参数——相结构因子和界面结合因子,分析讨论了合金元素Mo,Cr和V对Ti-4.5Al-5Mo-1.5Cr与Ti-6Al-4V钛合金相空间及其异相界面价电子结构的影响,进而在电子结构层次上揭示了Ti-4.5Al-5Mo-1.5Cr合金增韧的微观本质原因.
The valence electron structures of phases and biphase interfaces in Ti-4.5Al-5Mo-1.5Cr and Ti-6Al-4V alloys are calculated with Yu's empirical electron theory (EET) of solid and molecule and Cheng's improved Thomas-Fermi-Dirac (TFD) theory. The influences of alloying elements V. Mo, Cr on the valence electron structures of phases and biphase interfaces of Ti-4.5Al5Mo-1.5Cr and Ti-6Al-4V alloys are discussed with valence electron structure parameters, i.e., phase structure factors and interface conjunction factors. Accordingly; the toughening mechanism of Ti4.5Al-5Mo-1.5Cr alloy is explained on the electron structure level.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第12期1246-1250,共5页
Acta Metallurgica Sinica
关键词
钛基合金
价电子结构
断裂韧性
相界面
Ti-based alloy
valence electron structure
toughening mechanism
phase interface
