STABILITY OF THE $beta$-PHASE IN TITANIUM-VANADIUM-MOLYBDENUM ALLOYS (in Russian)
Ti-Mo-V alloys quenched from 900 tained C, having a metastable ore resistant t -phase structure, were heated at 100 to 600 tained C with a holding time of 15 minutes to 100 hours. Alloys containing 9.4 to 14.2% molybdenum and 5.9 to 13.9% vanadium generally show the same ore resistant t - phase stability. The ore resistant t -phase is preserved for a holding time of 100 hours at 100 tained C, 25 to 36 hours at 200 tained C, and 16 to 25 hours at 300 tained C. The ore resistant t phase then decomposes, forming an -phase. At 400 and 500 tained C the - phase appears in 15 minutes and is preserved at400 tained C for 81 to 100 hours. The -phase is stable for 4 to 16 hours at 500 tained C and is then converted to an alpha -phase. The hardness increases with the appearance of the -phase and decreases with the appearance of the alpha - phase. Increasing the vanadium content to 20% had only a slight effect in improving the stability of the ore resistant t -phase. An alloy with 21.1% molybdenum and 9.7% vanadium had the greatest ore resistant t phase stability at 100 to 400 tained C. The ore resistant t -phase stability in Ti- Mo-V alloys increases with increasing molybdenum content. Data obtained previously on Ti- Mo-Mn alloys show that manganese is more effective than molybdenum in increasing the stability of the ore resistant t -phase. Thus, the titanium alloy with 17.9% manganese and 4.6% molybdenum possess good ore resistant t - phase stability on heating at 100 to 600 tained C, but the titanium alloy with 27.0% molybdenum and 3.8% manganese does not. Iron is more effective than manganese or vanadium in stabilizing the ore resistant t -phase when added in amoumts of 5 to 6% to a titanium-molybdenum alloy. (TTT)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-14-019471
- OSTI ID:
- 4175708
- Journal Information:
- Zhur. Neorg. Khim., Journal Name: Zhur. Neorg. Khim. Vol. Vol: 5
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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