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医用镍钛合金温变形过程中的本构关系和组织演变

朱绍珍 王杰

朱绍珍, 王杰. 医用镍钛合金温变形过程中的本构关系和组织演变[J]. 钢铁钒钛, 2022, 43(6): 51-57. doi: 10.7513/j.issn.1004-7638.2022.06.008
引用本文: 朱绍珍, 王杰. 医用镍钛合金温变形过程中的本构关系和组织演变[J]. 钢铁钒钛, 2022, 43(6): 51-57. doi: 10.7513/j.issn.1004-7638.2022.06.008
Zhu Shaozhen, Wang Jie. Constitutive relationship analysis and microstructural evolution of biomedical Ni-Ti alloy during warm deformation[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 51-57. doi: 10.7513/j.issn.1004-7638.2022.06.008
Citation: Zhu Shaozhen, Wang Jie. Constitutive relationship analysis and microstructural evolution of biomedical Ni-Ti alloy during warm deformation[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 51-57. doi: 10.7513/j.issn.1004-7638.2022.06.008

医用镍钛合金温变形过程中的本构关系和组织演变

doi: 10.7513/j.issn.1004-7638.2022.06.008
基金项目: 西安市博士后创新基地项目(2019-5)
详细信息
    作者简介:

    朱绍珍,1988年出生,男,山东枣庄人,博士,工程师,主要研究方向:稀贵金属材料加工,E-mail:szzhu12s@alum.imr.ac.cn

  • 中图分类号: TF823,TG301

Constitutive relationship analysis and microstructural evolution of biomedical Ni-Ti alloy during warm deformation

  • 摘要: 为研究医用镍钛合金的温变形行为,利用Gleeble-3800 热模拟试验机对其进行压缩试验,获得了合金压缩过程的真应力-真应变曲线,分析了合金在变形过程中的本构关系和微观组织演变过程,并建立了加工图,确定出较好的加工参数。结果表明,动态回复和再结晶是压缩变形过程中主要的软化机制,当30≤lnZ≤42时,合金发生动态回复,当23≤lnZ≤26时,合金发生动态再结晶。根据合金微观组织分析结果及热加工图,合金在较低应变速率和较高温度下变形时具有良好的塑性变形能力和细小的再结晶组织,合金较好的两个变形工艺参数区域为:区域1为变形温度935~1045 K,应变速率0.001~0.004 s−1;区域2为变形温度1045~1073 K,应变速率0.003~0.03 s−1
  • 图  1  镍钛合金压缩变形真应力-真应变曲线

    Figure  1.  True stress-true strain curves of Ni-Ti alloy obtained by compression tests

    图  2  热压缩过程中变形参数之间的关系曲线

    Figure  2.  Relationships among deformation parameters during hot compression

    图  3  lnZ与ln[sinh(ασP)]的关系曲线

    Figure  3.  Relationships between lnZ and ln[sinh(ασP)]

    图  4  合金在773 K下变形后的显微组织

    Figure  4.  Microstructures of alloy deformed at 773 K

    图  5  合金在873 K下变形后的显微组织

    Figure  5.  Microstructures of alloy deformed at 873 K

    图  6  合金在973 K下变形后的显微组织

    Figure  6.  Microstructures of alloy deformed at 973 K

    图  7  合金在1073 K下变形后的显微组织

    Figure  7.  Microstructures of alloy deformed at 1073 K

    图  8  lnZ与变形参数之间的关系

    Figure  8.  Relationships between lnZ and deformation parameters

    图  9  镍钛合金在不同应变下的加工图

    Figure  9.  Processing maps of the Ni-Ti alloy under different strains

    表  1  镍钛合金的化学成分

    Table  1.   Chemical compositions of the Ni-Ti alloy %

    NiCNOTi
    55.990.009<0.0030.032余量
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-06-02
  • 刊出日期:  2023-01-13

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