Compressive strength and splitting tensile strength ofZr-based metallic glass

✍ Scribed by Hidefumi Date; Minako Ishiguro; Masatoshi Futakawa; Takashi Naoe

• Publisher: Elsevier
• Year: 2011
• Tongue: English
• Weight: 763 KB
• Volume: 10
• Category: Article
• ISSN: 1877-7058
• DOI: 10.1016/j.proeng.2011.04.141

✦ Synopsis

A Compressive test on Zr-based metallic glass was performed using a universal testing machine. The fracture process was recorded by high-speed video camera with a recording rate of 125,000 fps. The specimen was shearfractured at 1.9 GPa accompanied by the strong light emission. The fracture surface consisted of the brittle and vainpatterned surfaces. In addition, another compressive test was carried out in argon gas. Since light emission was not observed, it was evident that the light emission was a result of the oxidization of hot particles. In order to identify the beginning of the fracture, a splitting tensile test was carried out. Light emission began at the centre of the crosssection of a cylindrical specimen, and the crack was propagated in a direction of about forty-five degrees from the horizontal. The fracture criterion of Zr-based bulk metallic glass is not determined by the principal stress. The effect of the fraction of crystallization in Zr-based bulk metallic glass on light emission was also investigated using a specimen heat-treated at several temperatures. The relation between the fraction of crystallization and light emission was confirmed by the experimental analysis.