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基于MATLAB的Ti80合金热变形行为及热加工图
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作者单位:

1.河南科技大学材料科学与工程学院;2.中国船舶重工集团公司第七二五研究所;3.广东省材料与加工研究所

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中图分类号:

TG146.2

基金项目:

国家重点研发计划(2016YFB0300400);河南省创新型科技团队(C20150014)


Hot deformation behavior and processing map of Ti80 alloy based on MATLAB
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Affiliation:

1.Institute of Materials and Engineering,Henan University of Science and Technology;2.Luoyang Ship Material Research Institute

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    摘要:

    用热模拟试验机、光学显微镜、MATLAB软件研究了双态组织Ti80合金在变形温度860 ~ 1020 ℃、应变速率0.001 ~ 10 s-1、最大变形量50%下的热变形和热加工特性。结果表明:Ti80合金为负温度敏感型、正应变速率敏感型材料,主要软化机制随温度的升高由动态再结晶转变为动态回复。利用MATLAB编程构建了应变补偿本构方程与热加工图,计算应力与试验应力的相关系数R=0.994、平均相对误差AARE=7.443%;合金最佳热加工工艺参数区间为:[980 ~ 1015 ℃]-[0.013 ~ 0.100 s-1],该区峰值功率耗散系数h=64%。

    Abstract:

    The thermal deformation behavior and heat processability of Ti80 alloy with bimodal microstructure was discussed in temperature of 860 ~ 1020 ℃, strain rate range of 0.001 ~ 10 s-1 and maximal deformation of 50% by hot simulator, optical microscope and MATLAB software. Results showed that Ti80 alloy is negative temperature and positive strain rate sensitive material. Main softening mechanism changes from dynamic recrystallization to dynamic recovery when temperature increases. In addition, the train compensation constitutive equation and processing map were constructed by MATLAB programming. Correlation coefficient R between the predicted value and the experimental value of constitutive equation is 0.994, and average relative error AARE is 7.443%. The optimum processing parameters interval of Ti80 alloy is [980 ~ 1015 ℃]-[0.013 ~ 0.100 s-1], which peak of power dissipation h is 64%.

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权思佳,宋克兴,张彦敏,王启,李炎,邹黎明.基于MATLAB的Ti80合金热变形行为及热加工图[J].稀有金属材料与工程,2019,48(11):3600~3607.[Quan Sijia, Song Kexing, Zhang Yanmin, Wang Qi, Li Yan, Zou Liming. Hot deformation behavior and processing map of Ti80 alloy based on MATLAB[J]. Rare Metal Materials and Engineering,2019,48(11):3600~3607.]
DOI:10.12442/j. issn.1002-185X.20180796

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  • 收稿日期:2018-07-24
  • 最后修改日期:2018-09-01
  • 录用日期:2018-10-09
  • 在线发布日期: 2019-12-10
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