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    刘晓燕, 赵西成, 杨西荣, 张凯, 解晨. 应变速率对室温下90°等通道转角挤压变形工业纯钛拉伸性能的影响[J]. 机械工程材料, 2013, 37(8): 5-8.
    引用本文: 刘晓燕, 赵西成, 杨西荣, 张凯, 解晨. 应变速率对室温下90°等通道转角挤压变形工业纯钛拉伸性能的影响[J]. 机械工程材料, 2013, 37(8): 5-8.
    shu
    LIU Xiao-yan, ZHAO Xi-cheng, YANG Xi-rong, ZHANG Kai, XIE Chen. Effect of Strain Rate on Tensile Properties of Commercial Pure Titanium Processed by ECAP at Room Temperature with a 90° Die[J]. Materials and Mechanical Engineering, 2013, 37(8): 5-8.
    Citation: LIU Xiao-yan, ZHAO Xi-cheng, YANG Xi-rong, ZHANG Kai, XIE Chen. Effect of Strain Rate on Tensile Properties of Commercial Pure Titanium Processed by ECAP at Room Temperature with a 90° Die[J]. Materials and Mechanical Engineering, 2013, 37(8): 5-8.
    shu

    应变速率对室温下90°等通道转角挤压变形工业纯钛拉伸性能的影响

    Effect of Strain Rate on Tensile Properties of Commercial Pure Titanium Processed by ECAP at Room Temperature with a 90° Die

      摘要
    • 摘要: 采用单向拉伸测试方法, 研究了应变速率(0.001 7, 0.01, 0.1 s-1)对室温下经90°等通道转角挤压变形1道次工业纯钛室温拉伸性能的影响, 并分析了其断口形貌。结果表明: 当应变速率由0.001 7 s-1升至0.1 s-1时, 挤压后工业纯钛的断裂伸长率由17.9%减至14.9%, 抗拉强度由780 MPa增至926 MPa, 应变硬化指数由0.07降低到0.04; 拉伸断口均为韧窝型韧性断口, 且随应变速率的增加韧窝深度变浅。

       

      Abstract: The uniaxial tensile test was applied to investigate the effect of strain rate (0.001 7, 0.01, 0.1 s-1) on the tensile properties and fractography of commercial pure titanium (CP-Ti) fabricated by equal channel angular pressing (ECAP)with one pass deformation at room temperature using a die of 90°. The results show as the strain rate rose from 0.001 7 s-1 to 0.1 s-1, elongation to fracture decreased from 17.9% to 14.9%, and ultimate tensile strength increased from 780 MPa to 926 MPa, and work hardening exponent reduced from 0.07 to 0.04. The fracture surface of CP-Ti exhibited tough fracture of dimple, and dimple became shallow with the increase of strain rate.

       

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