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金属学报  1988 

亚稳β-Ti合金中TiC的析出特征

, PP. 248-253

Keywords: 界面相,亚稳β-Ti合金,碳化钛

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Abstract:

本文研究了Ti-3.84Al-6.2Mo-10.43V-1.85Fe合金中TiC的析出行为.当合金经低于α+β→β转变温度加热淬火之后,在α/β相界面上存在TiC膜,其形貌与α-β双相合金中TiH_2界面相类似.TiC界面相提供了裂纹易扩展途径和裂纹萌生点.断口也与TiH_2界面相引起的相似.经β固溶处理后再等温时效,在有些试样的电子衍射花样中观察到了弧形衍射(2α相的特征衍射).根据合金成分和点阵常数分析,产生弧形衍射的质点可能是TiC,而非所谓的2α相.

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