Effect of High-Energy Electro-Pulses on the Compression Deformation Behavior of Ti-6Al-4V Alloy

Zhiyong Zhao; Hongliang Hou; Ning Zhang; Yanling Zhang; Yaoqi Wang; Guofeng Wang

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자료유형: 학술저널

저자정보: Zhiyong Zhao (Harbin Institute of Technology) Hongliang Hou (Beijing Aeronautical Manufacturing Technology Research Institute) Ning Zhang (Beijing Aeronautical Manufacturing Technology Research Institute) Yanling Zhang (Beijing Aeronautical Manufacturing Technology Research Institute) Yaoqi Wang (Beijing Aeronautical Manufacturing Technology Research Institute) Guofeng Wang (Harbin Institute of Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.22 No.4

발행연도: 2016.1

수록면: 585 - 593 (9page)

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Compression tests of Ti–6Al–4V alloy were conducted using an electron universal testing machine with discharge voltages that range from 50 V to 70 V and strain rate of 0.01 s −1 . Isothermal compression at equivalent temperatures was also performed on a universal testing machine with furnace, with the same strain rate. Results show that the deformability of Ti–6Al–4V alloy can be significantly improved by high-energy electro-pulses, and the deformation resistance and yield stress were also decreased. Moreover, the effect of high-energy electropulses on compression mechanical properties of Ti–6Al–4V alloy increased with increasing discharge voltage. However, elongation and deformation resistance of compressions with high-energy electro-pulses were higher than isothermal compressions at equivalent temperatures. This result proved that the deformability improvement of Ti–6Al–4V alloy by high-energy electro-pulses results from the joint effects of temperature and electro-plasticity. Fracture modes in different experimental conditions were analyzed by observing the fracture morphologies of specimens by using a scanning electron microscope. Under high-energy electro-pulses, the micro morphology of compression fracture changes from elongated oval to equiaxed dimples, and the fracture modes transfer from intergranular to transgranular fracture.

참고문헌 (40)

참고문헌 신청

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