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Ti-Al-V,Ti-Al-Mo和Ti-Al-Nb合金系的实验结果表明,ω相的形成是遵守电子浓度规律的。过渡族元素Ti,V,Mo,Nb的价电子数分别为4(s~2d~2),5(s~2d~3),6(s~1d~5),5(s~1d~4)非过渡族元素Al的价电子数为3(s~2p~1)。此外,合金元素的化学负电性和原子半径对ω相的形成也有影响。综合合金元素的价电子数、化学负电性和原子半径三个因素,钛合金中ω相形成的特征值可定为4.223,其表达式为4.223=∑Nf_i+0.310Δx/x_(Ti)+0.551Δr/r_(Ti)
The experimental results of Ti-Al-V, Ti-Al-Mo and Ti-Al-Nb alloys show that the formation of ω phase complies with the law of electron concentration. The valence numbers of transition elements Ti, V, Mo and Nb are 4 (s ~ 2d ~ 2), 5 s ~ 2d ~ 3, 6 s ~ 1d ~ 5, ) The number of valence electrons of non-transition group element Al is 3 (s ~ 2p ~ 1). In addition, the chemical negative alloying elements and atomic radius on the formation of ω phase also have an impact. The eigenvalues of the ω phase in the titanium alloy can be set as 4.223 by comprehensively combining the valence number, the negative charge and the atomic radius of the alloying elements, and the expression is 4.223 = ΣNf_i + 0.310Δx / x_ (Ti) +0.551 Δr / r_ (Ti)