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单向拉伸中TB5钛合金组织转变的原位观察

, PP. 1474-1477

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Abstract:

通过单向拉伸下的视频显微镜原位观察,定量研究了Ti-15V-3Cr-3Sn-3Al(即为TB5)钛合金显微组织在拉伸过程中的演变规律.结果表明单向拉伸时,该钛合金在弹性阶段组织变化不明显,而在塑性阶段随变形量的增加,组织中滑移带的变化可分为单滑移、多滑移和交滑移3个阶段.在单向拉伸过程中,由于滑移带从单滑移进入到多滑移,发生了几何硬化,导致晶粒变化减缓,滑移带的转动幅度变小.

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