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《Acta Metallrugica Sinica》 2002-12
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STUDY ON THE TOUGHENING MECHANISM OF Ti-4.5Al-5Mo-l.5Cr ALLOY WITH THE VALENCE ELECTRON THEORY

LIU Weidong, LIU Zhilin, QU HuaDepartment of Materials and Chemical Engineering, Liaoning Institute of Technology, Jinzhou 121001  
The valence electron structures of phases and biphase interfaces in Ti-4.5Al-5Mo-1.5Cr and T1-6A1-4V 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-4.5Al-5Mo-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 Ti-4.5Al-5Mo-1.5Cr alloy is explained on the electron structure level.
【CateGory Index】: TG146.23
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