采用加工图理论分析了TC17(Ti-5Al-4Mo-4Cr-2Sn-2Zr)钛合金在高温变形过程中的片状α球化规律.结果表明:用加工图理论分析材料的高温变形行为能准确直观地反映出材料在不同变形条件下的组织演变规律.分析加工图发现:TC17合金在840℃～870℃,应变速率0.5 s-1～3 s-1之间变形是片状α组织球化的理想区域,此时对应的能量耗散效率值为45%左右;在850℃～910℃,较高应变速率(＞5 s-1)下对TC17合金加工易发生流变不稳定现象,形成绝热剪切带.
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