Titanium Zirconium Molybdenum Alloy Second Phase Strengthening
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- Category: Molybdenum knowledge
- Published on 03 August 2015
- Written by yiping
- Hits: 300
In titanium zirconium molybdenum (TZM) alloy the titanium (Ti), zirconium (Zr) and carbon (C) can form fine carbide particles, for example TiC and ZrC particles. And these dispersed particle which can effectively impede dislocation movement to produce a second phase strengthening in TZM alloy. According to the formula of m (Ti + Zr) m(C), the best ratio of titanium, zirconium and carbon is between 4 and 10. If the proportion is too big or too small is not conducive to improving the strength of the TZM alloy. If C proportion is too high then it will not only to generate carbides such as TiC and ZrC, but also will to generate Mo2C, which can affect alloy’s mechanics performance. And when Ti increased without a corresponding increase with C, it will also affect tensile strength. Therefore, only when Ti, Zr and C increase with a right proportion so alloy strength will increase. TZM alloy carbides actually isn’t much, most of the oxide is Mo2O, ZrO, TiO, their will bring a beneficial effect on TZM alloy strength, but it will cause difficulties on later thermal processing , while it is difficult to solve this problem of brittleness.
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