TA18钛合金热变形行为及热加工图研究

彭力; 江健; 罗小峰; 申学良; 王莹; 邢远

doi:10.7513/j.issn.1004-7638.2022.06.007

TA18钛合金热变形行为及热加工图研究

doi: 10.7513/j.issn.1004-7638.2022.06.007

彭力^{1, 2,},
江健^{1, 2},
罗小峰^{1, 2},
申学良^{1, 2},
王莹^{1, 2},
邢远^{1, 2}

1.
钒钛资源综合利用国家重点实验室, 四川攀枝花 617000
2.
成都先进金属材料产业技术研究院股份有限公司, 四川成都 610303

详细信息

作者简介:
彭力，1990年出生，男，四川大英人，工程师，研究方向：钛合金加工，E-mail：listen0812@163.com

中图分类号: TF823
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- 被引次数: 0
出版历程
- 收稿日期: 2022-04-18
- 刊出日期: 2023-01-13

Hot deformation behavior and processing maps of TA18 titanium alloy

Peng Li^{1, 2
,},
Jiang Jian^{1, 2},
Luo Xiaofeng^{1, 2},
Shen Xueliang^{1, 2},
Wang Ying^{1, 2},
Xing Yuan^{1, 2}

1.
State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China
2.
Chengdu Advanced Metal Materials Industrial Technology Research Institute Co., Ltd., Chengdu 610303, Sichuan, China

摘要

摘要: 采用Gleeble 3500热模拟试验机研究了TA18钛合金在750～1050 ℃和0.001～10 s⁻¹条件下的热变形行为，建立了Zener-Hollomon参数（Z参数）的本构方程及热加工图。结果表明，TA18钛合金β单相区的变形激活能为310.71 kJ/mol，α+β双相区的应变激活能为578.78 kJ/mol。经过拟合得到了TA18钛合金在单相区和双相区变形的流变应力本构方程。通过对热加工图的分析，确定了TA18钛合金合理的热加工参数范围为：变形温度825～900 ℃，应变速率0.01～0.05 s⁻¹。试验结果可为TA18钛合金热加工工艺参数的选择提供理论依据。
- TA18钛合金 /
- 热压缩变形 /
- 本构方程 /
- 热加工图
Abstract: The hot deformation behavior of TA18 Titanium alloy was investigated using the Gleeble-3500 test machine at 750 − 1050 ºC with strain rates from 0.001 s⁻¹ to 10 s⁻¹, and the constitutive equation including Zener-Hollomon parameter (Z parameter) and processing map was established. The results revealed that the activation energy of TA18 alloy in the β single-phase region and α+β two-phase region was 310.71 kJ/mol and 578.78 kJ/mol, respectively. The fitting flow stress constitutive equations were obtained. In addition, the processing maps showed that the optimal hot processing parameter ranges were 825 − 900 ºC with a strain rate of 0.01～0.05 s⁻¹. This study can provide a theoretical basis for selecting the hot working parameters of TA18 titanium alloy.
- TA18 titanium alloy /
- hot compression deformation /
- constitutive equations /
- thermal processing map

HTML全文

图 1 TA18钛合金初始金相组织

Figure 1. Original microstructure of TA18 alloy

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图 2 不同应变速率条件下变形的真应力-真应变曲线

Figure 2. True stress-true strain curves of TA18 alloy at different strain rates

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图 3 应变速率与峰值应力的形变关系

Figure 3. Relationship between strain rates and peak stress

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图 4 应力和温度的变化关系

Figure 4. Relationship between stress and temperature

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图 5 lnZ与应力的关系

Figure 5. Relationship between lnZ and stress

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图 6 TA18钛合金不同应变下的热加工图

Figure 6. Processing maps of TA18 alloy at different strains

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