| A set of microstructure-based constitutive equations in hot forming of a titanium alloy |
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| 作者姓名： | Xiaoli Li Miaoquan Li |
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| 作者单位： | College of Materials Science ＆ Engineering, Northwestern Polytechnical University, Xi＇an 710072, China |
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| 基金项目： | 国家自然科学基金，the State Key Foundational Research Plan，教育部高校优秀青年教师资助计划 |
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| 摘 要： | 1. Introduction With the wide application of numerical simulation in metal forming, an accurate constitutive equation, which expresses a correlation between the deformation behavior and the process parameters, needs to be es- tablished. For many years, a …
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| 关 键 词： | 钛合金 本构方程 显微结构 晶粒尺寸 位错密度 |
| 收稿时间： | 2005-03-30 |
A set of microstructure-based constitutive equations in hot forming of a titanium alloy |
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| Xiaoli Li Miaoquan Li.A set of microstructure-based constitutive equations in hot forming of a titanium alloy[J].Journal of University of Science and Technology Beijing,2006,13(5):435-441. |
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| Authors: | Xiaoli Li Miaoquan Li |
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| Affiliation: | College of Materials Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | A physical model of microstructure evolution including dislocation density rate and grain growth rate was established based on the deformation mechanism for the hot forming of a class of two-phase titanium alloys. Further, a set of mechanism-based constitutive equations were proposed, in which the microstructure variables such as grain size and dislocation density were taken as internal state variables for characterizing the current material state. In the set of constitutive equations, the contributions of different mechanisms and individual phase to the deformation behavior were analyzed. The present equations have been applied to describe a correlation of the flow stress with the microstructure evolution of the TC6 alloy in hot forming. |
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| Keywords: | titanium alloy constitutive equations microstructure evolution grain size dislocation density |
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