Acoustic Emission Study on Fracture Toughness in Ti-6Al-4V Alloy with Various Acicular α Microstructures
The Ti-6Al-4V alloy is widely used as aerospace structural material. However, the toughness is decreased by increasing strength. It has been reported that the Ti-6Al-4V alloy with coarse acicular α structure has high fracture toughness1,2, but the fracture mechanism of high toughness in coarse acicular α structure has not been fully understood. In Ti alloys, it has been reported that the nucleation, growth and coalescence of voids or microcracks at the tip of main crack influence the fracture process3,4.
KeywordsFracture Toughness Acoustic Emission Crack Opening Displacement Water Quench Acoustic Emission Event
Unable to display preview. Download preview PDF.
- 1.A. Gaysler and G. Luetjering, Proc. 4th Int. Conf. on Titanium. 3, 2001 (1984).Google Scholar
- 2.H. Margolin, et al, Proc. 5th Int. Conf. on Titanium. 1, 169 (1980).Google Scholar
- 3.T. Kishi, H. Ohyama and K. Kim, J. Iron Steel Inst. Japan, 61, 123 (1986).Google Scholar
- 4.T. Horiya, H. G. Suzuki, T. Kishi, Tetsu-to-Hakane. 75, 114 (1989).Google Scholar
- 5.T. Kishi, K. Ohono and K. Kuribayashi, J. Japanese Soc. Nondestructive Inspection. 30, 911 (1981).Google Scholar
- 6.T. Kishi, Proc. 7th Int. Acoustic Emission Symposium. 302 (1984).Google Scholar
- 8.R. Burridge and L. Knopoff, Bul. Seismological Soc. Am. 54, 1875 (1964).Google Scholar
- 9.C. B. Scruby and G. R. Baldwin, J. Acoustic Emission. 3, 125 (1984).Google Scholar
- 10.M. Enoki, T. Kishi, J. Kihara, J. Japan Inst. Metals. 52, 405 (1988).Google Scholar