High-temperature dilatometry of Ti-46Al-8Nb refractory alloy
作者： A. V. Kartavykh , V. V. Tcherdyntcev , A. A. Stepashkin , M. V. Gorshenkov
DOI: 10.1134/S0036029513070082
关键词:
摘要: The temperature dependence of the linear thermal expansion coefficient K L intermetallic Ti- 46Al-8Nb (at %) alloy is experimentally determined for first time within range from 373 to 1773 (solidus point). boundaries phase fields are compared with results differential analysis and calculated diagram alloy. hightemperature limit (1384 K) structure thermostability detected signs α2 + γ α transition in dilatometric curves. restructuring mechanism field studied by scanning electron microscopy. It shown that accompanied selective structural degradation singlecrystalline lamellae related destruction a fine lamellar α2�Ti 3Al(Nb) γ�TiAl(Nb) texture. average values KL 100�K ranges lowtemperature field, which inter� est practical viewpoint, according State Standard GOST 8.018-2007.
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