Effect of Process Parameters on Properties of Titanium Alloy during Thermal Simulation Deformation

J. Tang, Cui Liang, Chenkun Xu, J. Li
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Abstract

In this paper, aiming at the heat resistance and thermal deformation process of titanium matrix composites 0 vol.%, 2.5.vol.%, 5.vol.%. Thermal simulation experiment of titanium matrix composites with different (TiB+TiC) strengthening phase content. The measurement accuracy of material displacement is 0.01 mm. The compression is 70%, and the strain rate is 0.1 mm/s and 0.01 mm/s respectively. Compression tests at different strain rates and temperatures were carried out. The experimental results show that when the (TiB+TiC) 5vol% titanium composite is deformed at 0.01mm/s low strain rate, the peak stresses corresponding to 25°C, 250°C,350 °C and 500°C are increased to 1096MPa, 835MPa, 646MPa and 416MPa respectively. Under the condition of high strain rate of 0.1mm/s, the peak stresses corresponding to 25 °C, 250 °C, 350 °C and 500 °C are increased to 1230 MPa, 896 MPa, 723 MPa and 471 MPa respectively. The deformation law of stress rheological curve is roughly the same, and the high temperature zone has good plastic deformation ability. The titanium matrix composite has high compression rheological mechanical properties and good high-temperature plastic deformation ability. It is the preferred material component for the preparation of titanium matrix composite and powder forging.
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热模拟变形过程中工艺参数对钛合金性能的影响
本文针对0 vol.%, 2.5 vol.%钛基复合材料的耐热性和热变形过程进行了研究。%, 5. vol. %。不同(TiB+TiC)强化相含量的钛基复合材料热模拟实验。材料位移测量精度为0.01 mm。压缩率为70%,应变速率分别为0.1 mm/s和0.01 mm/s。进行了不同应变速率和温度下的压缩试验。实验结果表明,当(TiB+TiC) 5vol%钛复合材料以0.01mm/s的低应变速率变形时,25℃、250℃、350℃和500℃对应的峰值应力分别提高到1096MPa、835MPa、646MPa和416MPa。在高应变速率为0.1mm/s的条件下,25℃、250℃、350℃和500℃对应的峰值应力分别增加到1230 MPa、896 MPa、723 MPa和471 MPa。应力流变曲线的变形规律大致相同,高温区具有良好的塑性变形能力。钛基复合材料具有较高的压缩流变力学性能和良好的高温塑性变形能力。是制备钛基复合材料和粉末锻造的首选材料组分。
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