钛合金弹性性质的多尺度模拟  

Multiscale Simulation of Elastic Properties of Titanium Alloy

作　　者：陈伟[1] 牛丽娜 薛婷 张素芳 柴敏 赫娟[1] 贾俊辉 Chen Wei;Niu Lina;Xue Ting;Zhang Sufang;Chai Min;He Juan;Jia Junhui(School of Life Science,Shanxi Normal University,Taiyuan 030031,China;Key Laboratory of Magnetic Molecules and Magnetic Information Material,Ministry of Education,College of Chemistry and Material Science,Shanxi Normal University,Taiyuan 030031,China)

机构地区：[1]山西师范大学生命科学学院,山西太原030031 [2]山西师范大学化学与材料科学学院磁性分子与磁性信息材料教育部重点实验室,山西太原030031

出　　处：《稀有金属材料与工程》2024年第7期1909-1916,共8页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(21805175,31701949);青海省中央引导地方科技发展资金(2022ZY022)。

摘　　要：钛合金弹性性质因其组成成分以及组织结构的差异而不同。本研究基于多尺度弹性响应本构模型,以双相α+β钛合金为例,理论预测了钛合金在载荷作用下的等效弹性响应,理论计算了不同相含量的钛合金等效弹性性质参数,如等效弹性模量E、等效体积模量K、等效剪切模量G以及等效泊松比n,揭示了相含量对钛合金弹性性质的影响机制。与不同细观力学模型以及实验测量值的比较表明,双相钛合金E受α相的影响较大,随α相的降低,近似从111.1 GPa逐渐降至87.5 GPa;K、G以及n受β相的影响较大,随β相的增加,K近似从104.2 GPa增至117.2 GPa,G从42.0 GPa降至31.8 GPa,n从0.322增至0.376。模型预测值与实验测量值大致相当,从而证实了该模型的准确性。The elastic properties of titanium alloys are affected by their composition and structure.Based on the constitutive model of multiscale elastic response,takingα+βtitanium alloy as an example,the equivalent elastic response ofα+βtitanium alloy under load was theoretically predicted and the equivalent elastic properties of titanium alloys with different phase contents were calculated,such as equivalent elastic modulus E,equivalent bulk modulus K,equivalent shear modulus G and equivalent Poisson’s ratio n.The mechanism of the effect of phase content on the equivalent elastic properties of titanium alloys was also revealed.The comparison between different micromechanical models and experimental measurements shows that the E of titanium alloy is affected byαphase,which approximately decreases from 111.1 GPa to 87.5 GPa and K,G,and n are affected byβphase.K approximately increases from 104.1 GPa to 117.2 GPa,K approximately decreases from 42.0 GPa to 31.8 GPa,and n approximately increases from 0.322 to 0.376.The accuracy of the model is confirmed by the consistence with experimental measurements.

关 键 词：钛合金 弹性性质 多尺度模拟 

分 类 号：TG146.23[一般工业技术—材料科学与工程]