Controlling Deformation in Titanium Alloy Structures
Author Information
Author(s): Zhang Tao, Xia Jianchao, Han Xiuquan, Du Lihua, Chen Lihua, Han Yujie, Cao Fengchao, Wang Duoduo, Liu Xiaochuan
Primary Institution: Northwestern Polytechnical University
Hypothesis
This study investigates precision control techniques for the hot forming process of thin-walled hyperbolic skins from TC4 titanium alloy.
Conclusion
The study successfully identifies the relationship between forming defects and the geometrical characteristics of thin-walled hyperbolic skins, demonstrating effective hot forming processes.
Supporting Evidence
- The viscoplastic constitutive model accurately fits the stress-strain curves of the titanium alloy.
- The study identifies critical parameters influencing thickness-wise instability in the skin.
- Hot forming at 750 °C is determined to be optimal for TC4 titanium alloy.
- Wrinkling in the convex configuration is primarily due to local compressive stress exceeding critical instability stress.
- The relationship between chord heights and lengths is crucial for predicting wrinkling.
Takeaway
This research looks at how to shape titanium alloy into complex forms without creating defects like wrinkles, which is important for making strong parts for airplanes.
Methodology
The study employs uniaxial tensile tests and hot forming processes to analyze the deformation behavior of TC4 titanium alloy.
Limitations
The study primarily focuses on two forming methods and may not cover all potential forming techniques or materials.
Digital Object Identifier (DOI)
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