The influence of Pd on tension–tension fatigue behavior of Zr-based bulk-metallic glasses

✍ Scribed by G.Y. Wang; P.K. Liaw; Y. Yokoyama; M. Freels; A. Inoue

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 502 KB
• Volume: 32
• Category: Article
• ISSN: 0142-1123
• DOI: 10.1016/j.ijfatigue.2009.04.009

✦ Synopsis

a b s t r a c t

Zr-based bulk-metallic glasses (BMGs) are being studied widely because Zr-based BMGs exhibit good glass-forming abilities and excellent properties, such as material strengths. In the current paper, the fatigue behaviors of Zr 50 Cu 40Àx Al 10 Pd x [x: 0-7 atomic percent (at.%)] BMGs were investigated. The uniaxial tension-tension fatigue experiments were performed on the button-head rod fatigue specimens. The test environment was air at room temperature. The fatigue limit of Zr 50 Cu 37 Al 10 Pd 3 was found to be the highest with a value of 945 MPa among the BMGs studied. A mechanistic understanding of the fatigue behavior of these Zr-based BMGs is suggested. The effect of the Pd content on the fatigue behavior was analyzed. A possible relationship between the fatigue limit (or the fatigue ratio) and the volume change, which probably corresponds to excessive free volume, was developed.