高合金化β钛合金拉伸延性的价电子理论分析

STUDY ON THE TENSILE DUCTILITY OF HIGH ALLOY ING /3-TITANIUM ALLOY WITH THE VALENCE ELECTRON THEORY

利用EET理论计算了钛合金β固溶体的价电子结构,并用相结构因子nA,F,σN,ρLV及键络空间分布nα讨论了合金元素对β钛合金相变点、拉伸延性及变形能力的影响,进而在电子结构层次上初步揭示了高合金化β钛合金作为大截面锻件使用时拉伸延性低的本质原因.

The valence electron structures of β solid solutions in high alloying β-titanium alloys are calculated with Yu's empirical electron theory of solid and molecules. The influences of alloying elements on the transus, tensile ductility and deformation ability of high alloying β-titanium alloys are discussed with the phase structure factors nA, F, δN, PLV and the distribution na of bonds, further the low tensile ductility of high alloying β-titanium alloys used to be forge pieces with large section is explained on the level of electron structure.