Effect of Hot Forging Strain Rate on the Microstructure and Mechanical Properties of TC4-DT Titanium Alloy

Abstract:

The microstructures, tensile properties and fatigue property of TC4-DT titanium alloy hot die forged under different strain rates were investigated. The results show that the microstructures and mechanical properties of TC4-DT titanium alloy die forging using different strain rates can meet the requirement of technical standard. At the strain rates of 1mm/s and 10mm/s, the microstructure was not sensitive to the strain rate, and the alloys showed uniform, fine and fuzzy crystal grains, and no metallurgical defects. However, more uniform tensile properties in different orientations were obtained by the low strain rates (1mm/s), while the high strain rate (10mm/s) could lead to slightly increase in strength but obviously decline in ductility. High fatigue strength could be obtained by the low strain rate, but the fracture toughness and fatigue crack growth rate were not sensitive to the strain rates.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 271-275
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.271
• Online since: March 2016
• Authors: Guo Qiang Shang, Xin Nan Wang, Yue Fei, Jing Li, Li Wei Zhu, Zhi Shou Zhu
• Keywords: Hot Forging, Mechanical Properties, Microstructure, Strain Rate, TC4-DT Alloy

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DOI: 10.1016/j.msea.2005.06.027