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<p>Titanium is a metal that has excellent properties for industrial use, but its plastic deformation at room temperature is generally challenging. Although it’s the strongest among commercially pure titanium, titanium grade 4 has not been thoroughly investigated for plastic forming at high temperatures. This study involves conducting high-temperature tensile tests of titanium grade 4 by strain rates and temperatures. From the experimental results, various phenomena occurring at high temperatures are analyzed. Afterward, two constitutive models—the Johnson-Cook model and a newly proposed model—are used separately depending on the temperature range considering warm-hot transition temperature. This study aims to improve the accuracy of finite element analysis in predicting the plastic deformation of titanium grade 4 at high temperatures.</p>

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High temperature plasticity of titanium grade 4: Experimental investigation and constitutive modeling

  • 期刊论文

  • 发表日期：

    2025年5月30日

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  • Sungyong Koo,
  • Jungmoo Han,
  • Taehoon Kang,
  • Jinho Kim,
  • Sungwook Choi

摘要

Titanium is a metal that has excellent properties for industrial use, but its plastic deformation at room temperature is generally challenging. Although it’s the strongest among commercially pure titanium, titanium grade 4 has not been thoroughly investigated for plastic forming at high temperatures. This study involves conducting high-temperature tensile tests of titanium grade 4 by strain rates and temperatures. From the experimental results, various phenomena occurring at high temperatures are analyzed. Afterward, two constitutive models—the Johnson-Cook model and a newly proposed model—are used separately depending on the temperature range considering warm-hot transition temperature. This study aims to improve the accuracy of finite element analysis in predicting the plastic deformation of titanium grade 4 at high temperatures.