一种钛基复合材料的热变形本构模型
Constitutive Modulus of Ti Based Composites in Hot Deformation
王蕊宁1, 高文柱1, 吕利强1, 奚正平2
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作者单位：1. 西部金属材料股份有限公司板带项目部, 陕西 西安710065; 2. 西北有色金属研究院, 陕西 西安710016
中文关键字：TiC颗粒； 钛基复合材料； 热变形； 本构关系； 变形激活能
英文关键字：TiC particle; Ti-based composites; hot deformation; constitutive relations; deformation activation energy
中文摘要：在Gleeble-1500热模拟试验机上进行热压缩试验，研究了变形温度为900～1150 ℃、应变速率为0.001～10 s－1时TiC颗粒增强钛基复合材料的热变形行为，根据所得应力应变曲线分析了该合金的热变形特征，并采用双曲正弦模型建立了该钛基复合材料的本构关系。计算了α＋β区域的平均变形激活能为691 kJ/mol，β区域平均变形激活能为202 kJ/mol。
英文摘要：The hot deformation behaviours of TiC particle reinforced Ti matrix composites were studied at 900～1150 ℃ and strain rate of 0.001～10 s-1. The compression testing was carried out on the Gleeble-1500 simulator by. On the basis of flow stress date obtained as a function of temperature and strain rate in compression, the deformation activation energy of 691 kJ/mol in α＋β region and 202 kJ/mol in β region were calculated and constitutive relations were established using hyperbolic sine constitutive equation.