基于JMatPro软件的TA15钛合金热物性能研究

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Abstract： The compositionof TA15 titanium alloy was predicted by JMatPro software，and the thermodynamic phase diagram under equilibrium conditions was obtained. Through the analysis of the change of the concentration of themainphasecomponents，itis known that its content is very litte affectedby neutral elements.The heat treatment properties，martensitic transition process and thermal properties of TA15 titanium alloy were calculated， and the rheological curves，martensitic phase diagrams ofdiferent cooling rates，and the variation curves of density， thermal conductivity，resistivity，Young's modulus，specific heat capacity，heat enthalpy，expansioncoefcientand other properties were obtained.During the cooling process，the faster the cooling rate，the more martensitic phases are intheproduct.Fine martensiticcan improve theultimatestrengthof the material，but it will reduce the body modulus and Young's modulus，and affect the fatigue performance of the material. Therefore， in heat treatment，it is necessary to control the cooling method to change the martensitic content in the tissue to ensure that the parts meet the performance requirements.

Keywords： titanium alloy; ingredient prediction; martensite; thermal properties; heat treatment

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随着航空器对材料性能、使用寿命的要求越来越严格，钛合金因其高强度、耐热性、耐蚀性等优势，在航空制造领域颇受青睐。（剩余6351字）