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变形方式对工业纯钛室温ECAP组织及性能影响
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国家自然科学基金项目(50874086)资助


Influence of ECAP Routes on the Microstructure and Properties of CP-Ti
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    摘要:

    采用2通道夹角Φ=120°, 外圆角Ψ=20°的模具,在室温分别采用A方式(相邻道次间试样不旋转)、B方式(相邻道次间,沿试样长度方向旋转90°进入下一道次)及C方式(相邻道次间,沿试样长度方向旋转180°进入下一道次)成功实现工业纯钛2道次等径弯曲通道变形(ECAP),观测分析试样显微组织和力学性能。结果表明:在室温下按不同变形方式进行ECAP变形2道次后,工业纯钛的强化效果基本相同。第1道次所形成的变形组织在第2道次变形时的变形机制及变形组织的演变规律因采取的变形方式而不同,从而使得形成的组织形貌不同,B、C方式皆可形成等轴胞状组织

    Abstract:

    The influence of equal channel angular pressing (ECAP) routes on the microstructure and properties of hcp commercial-purity titanium (CP-Ti) was investigated. Samples were successfully deformed at room temperature via three different processing routes: A, B, and C, using a die with an internal angle Φ of 120° and an outer curvature angle Ψ of 20°. After two passes, the microstructure and mechanical properties of as-pressed CP-Ti were studied. The results show that the ultimate strength and microhardness of CP-Ti billet were sharply enhanced after two ECAP passes by three ECAP routes at room temperature. But the ECAP route does not have significant effect on the strength and the microhardness of as-pressed CP-Ti. The microstructure developments occurred during the first pass, such as gain shape and deformed mechanism, vary with different routes during the second ECAP pass.

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杨西荣,赵西成,付文杰.变形方式对工业纯钛室温ECAP组织及性能影响[J].稀有金属材料与工程,2009,38(11):1910~1915.[Yang Xirong, Zhao Xicheng, Fu Wenjie. Influence of ECAP Routes on the Microstructure and Properties of CP-Ti[J]. Rare Metal Materials and Engineering,2009,38(11):1910~1915.]
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  • 收稿日期:2008-12-11
  • 最后修改日期:2009-06-12
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