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室溫Φ=120°等徑彎曲通道變形工業純鈦的力學性能

Mechanical properties of commercial pure titanium processed by ECAP at room temperature using a 120° die

  • 摘要: 采用模角Φ=120°的模具,以BC方式(兩次擠壓道次之間試樣繞縱軸沿同一方向轉動90°進行下一道次擠壓)在室溫下成功實現了工業純鈦8道次等徑彎曲通道變形(ECAP),對擠壓過程中各道次試樣的微觀結構及性能進行了分析測試.結果表明:工業純鈦經8道次ECAP變形后,抗拉強度由407 MPa升高到791 MPa;顯微硬度由1 588 MPa升高到2 641 MPa;并保持良好的塑性,伸長率為19%.

     

    Abstract: Eight-pass equal channel angular pressing (ECAP) at room temperature was successfully carried out on commercial pure Ti via route Bc, in which the samples were rotated by 90° along the vertical axis in the same direction between two extrusion passes, at an angle φ of 1200°. The microstructure and mechanical properties of the samples after different pressing passes were analyzed and tested. The results showed that after eight-pass ECAP, the tensile strength increased from 407 MPa to 791 MPa, the microhardness increased from 1 588 MPa to 2 641 MPa. the plasticity maintained well, and the elongation reached to 19%.

     

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