用ＴＥＭ观察了工业纯α－Ｔｉ板渗氢０．２—１．５３ｗｔ－％后析出的氢化物的形态和结构．结果表明：β－Ｔｉ（Ｈ）共析转变产物是δ氢化物和α－Ｔｉ，不同形状的δ氢化物和α－Ｔｉ微晶组成了微晶区；γ氢化物直接从α－Ｔｉ（Ｈ）中析出．用高分辨电子显微术（ＨＲＴＥＭ）观察了β－Ｔｉ（Ｈ）共析转变形成的微晶区的精细结构，表明δ氢化物周围可以存在满足δ氢化物和α－Ｔｉ两种取向关系的１０种α－Ｔｉ变体．本文讨论了β－Ｔｉ（Ｈ）共析转变的切变机制．
The morphology and the fine structure of the hydrides in Ti-H alloys, containing 0.2-1.53 wt-% hydrogen, were investigated by TEM. It was found that the eutectoid transformation products from β-Ti(H) were consisted of δ hydrides and α-Ti,forming a micro-polycrystalline aggregate, while γ hydride was precipitated from α-Ti(H) directly. The atomic structure of these microcrystals were carefully delineated by HRTEM, showing that there may be ten variants of α-Ti around δ hydrides, which can keep two definite crystallographic relationships with α-Ti. The shear mechanism of the eutectoid transformation is discussed.
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| [10] | NumakuraH,KoiwaM．ActaMetall,1984 |
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