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變形方式對工業(yè)純鈦室溫ECAP組織及性能影響
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國家自然科學基金項目(50874086)資助


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

    采用2通道夾角Φ=120°, 外圓角Ψ=20°的模具，在室溫分別采用A方式(相鄰道次間試樣不旋轉)、B方式(相鄰道次間，沿試樣長度方向旋轉90°進入下一道次)及C方式(相鄰道次間，沿試樣長度方向旋轉180°進入下一道次)成功實現工業(yè)純鈦2道次等徑彎曲通道變形(ECAP)，觀測分析試樣顯微組織和力學性能。結果表明：在室溫下按不同變形方式進行ECAP變形2道次后，工業(yè)純鈦的強化效果基本相同。第1道次所形成的變形組織在第2道次變形時的變形機制及變形組織的演變規(guī)律因采取的變形方式而不同，從而使得形成的組織形貌不同，B、C方式皆可形成等軸胞狀組織

    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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楊西榮,趙西成,付文杰.變形方式對工業(yè)純鈦室溫ECAP組織及性能影響[J].稀有金屬材料與工程,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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