Resistivity study and computer modelling of the isothermal transformation kinetics of Ti-6AI-4V and Ti-6AI-2Sn-4Zr-2Mo-0.08Si
Resistivity study and computer modelling of the isothermal transformation kinetics of Ti-6AI-4V and Ti-6AI-2Sn-4Zr-2Mo-0.08Si
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
S. Malinov;P. Markovsky;W. Sha;Z. Guo
中科院分区：
文献类型：
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作者：
S. Malinov;P. Markovsky;W. Sha;Z. Guo
采用电阻率法研究了Ti-6Al-4V和Ti-6Al-2Sn-4 Zr-2 Mo-0.08Si合金在等温条件下的B（cid：222）α 1 B相变动力学。动力学建模的框架中的约翰逊-梅尔-阿夫拉米（JMA）理论。导出了上述转变在不同温度和条件下的JMA动力学参数。动力学计算值与实验值吻合较好，提出了α相形成的两种不同机制。热力学平衡的计算结果表明，Ti-6Al-4V合金的热力学平衡与实验数据吻合良好，而Ti-6Al-2Sn-4 Zr-2 Mo-0.08Si合金的热力学平衡与实验数据不一致。根据电阻率测量结果，设计了两种合金的时间-温度-转变图。(cid（第211段）
A resistivity technique is used to study the kinetics of b (cid:222) a1b transformation for Ti–6Al–4V and Ti–6Al–2Sn–4Zr–2Mo–0.08Si alloys at isothermal conditions. The kinetics are modeled in the framework of the Johnson–Mehl–Avrami (JMA) theory. The JMA kinetic parameters for different temperatures and conditions of the above transformation are derived. A good agreement between the calculated and the experimental kinetics is demonstrated Two different mechanisms of a -phase formation depending on the temperature of isothermal exposure are proposed. The calculation of the thermodynamic equilibria showed good agreement with the experimental data for the Ti–6Al–4V alloy and disagreement for the Ti–6Al–2Sn–4Zr–2Mo–0.08Si alloy. Based on the resistivity results, time– temperature–transformation diagrams for both alloys are designed. (cid:211)