利用等温热压缩方法在９００－１０００℃范围内，研究了氢化对Ｔｉ３Ａｌ基的Ｔｉ－２５Ａｌ－１０Ｎｂ－３Ｖ－１Ｍｏ合金热变形行为的影响，并分析了显微组织的变化氢为０．２％（质量分数，下同）的试样可使峰值流变应力比未氢化试样降低３７％－４５％，即相当于降低热压缩温度约５０℃。氢化促进合金的α２相动态再结晶、球化及β相的动态回复
The effect of hydrogenation on the hot deformation behaviour of a cast Ti-25Al- 10Nb-3V- 1 Mo alloy was investigated by the isothermal hot compression test in the temperature range of 900-1000℃. The microstructural changes were examined by optical microscopy and TEM. A reduction(37%-45%) in the peak stress was observed when the alloy was charged to 0.2%H (mass fraction), which corresponds to decrease the deformation temperature by about 50℃ . Hydrogenation promotes the globularization or dynamic recrystallization of α2 phase and dynamic recovery of β phase in the alloy.Correspondent: ZHANG Yong,Beijing Box 81-4, Beijing 100095
参考文献
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