Ultrasonic properties of glassy alloys in terms of complex wave elasticity

✍ Scribed by Fukuhara, Mikio ;Zhang, Wei ;Inoue, Akihisa

• Book ID: 105364435
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 181 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200723103

✦ Synopsis

Abstract

Using ultrasonics, acoustic characteristics of Pd~40~Cu~30~P~20~, Zr~55~Cu~30~Al~10~N~i5~, Zr~65~Pd~12.5~Ni~10~Al~7.5~Cu~5~, Cu~55~Zr~30~Ti~10~Pd~5~, Cu~45~Zr~20~Hf~25~Ag~10~ and Ti~41.5~Cu~42.5~Ni~7.5~Hf~5~Zr~2.5~Sn~1~ glassy alloys were examined in terms of complex elasticity. The order of bulk modulus (K), Lamé parameter (λ), Young (E) and shear (G) moduli of the glassy alloys shows the monopolistical character of the glassy alloys, except for polymers and rubbers. Poison's ratio correlates well to the anisotropy factor and the ratio G /K, accompanied by dilational and shear attenuation coefficients, showing characteristic one‐dimensional elastic deformability of the glassy alloys. The complex elasticity shows that the viscoelasticity of the glassy alloys is predominated by volumetric motion, associated with the complex waves. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)