雷雨,徐念澳,张晨洁,赵耀,杨洋,安泽豪.热变形中TC18钛合金本构关系及第二类再结晶全图研究[J].稀有金属材料与工程,2020,49(12):4192~4198.[leiyu,xunianao,zhangchenjie,zhaoyao,yangyang,anzehao.The Constitutive Relation and Secondary Recrystallization Maps of the TC18 Titanium Alloy during the Hot Deformation[J].Rare Metal Materials and Engineering,2020,49(12):4192~4198.]
热变形中TC18钛合金本构关系及第二类再结晶全图研究
投稿时间:2019-12-28  修订日期:2020-02-20
中文关键词:  TC18钛合金  动态再结晶  本构方程  第二类再结晶全图
基金项目:湖南省科技创新项目(No. 2017GK2292),2019年度湖南省大学生创新创业训练计划项目(No. GS201910533280),粉末冶金国家重点实验室自主课题(No. 20181106)
中文摘要:
      分别反映金属流变应力特征和组织-变形关系的本构关系和第二类再结晶全图是TC18钛合金热加工工艺制订的关键数据。在Gleeble3800热模拟试验机上,对于TC18钛合金进行系列热压缩变形,其中,变形温度为790℃~900℃,应变速率为0.01s-1~10s-1,应变量为0.1~0.5。通过拟合Arrhenius式中α, n, Q, lnA与ε的六次多项式,建立了材料高温热压缩本构方程,热压缩流变应力预测值与实验值吻合良好;通过组织观察及α晶粒尺寸测算绘制出其各应变速率下的第二类再结晶全图。
The Constitutive Relation and Secondary Recrystallization Maps of the TC18 Titanium Alloy during the Hot Deformation
英文关键词:TC18 titanium alloy  dynamic recrystallization  constitutive equation  the secondary recrystallization maps
英文摘要:
      The constitutive equation and the secondary recrystallization maps, which reflect the flow stress characteristics and microstructure-deformation relationship of the material respectively, are the key data for the TC18 titanium alloy during the hot deformation. The hot compression deformation was taken on a Gleeble-3800 with the conditions that the deformation temperatures were 790℃~900℃, the strain rates were 0.01s-1~10s-1 and the strains were 0.1~0.5. By fitting the 6th polynomials of ε and α, n, Q, lnA in the Arrhenius formula respectively, TC18 titanium alloy’s constitutive equation of hot compression was established,the predicted values of flow stress of the hot compression are in a good agreement with the measured values; the secondary recrystallization maps of each strain rate were drawn by observing the microstructure and measuring α grains’ sizes.
作者单位E-mail
雷雨 中铝洛阳铜业有限公司质量管理部 leiyu207@163.com 
徐念澳 中南大学 材料科学与工程学院 xunianao@csu.edu.cn 
张晨洁 中南大学 材料科学与工程学院 chenjiezhang@csu.edu.cn 
赵耀 中南大学 材料科学与工程学院  
杨洋 中南大学 材料科学与工程学院  
安泽豪 中南大学 材料科学与工程学院  
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