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6 Appl. Phys. Lett. 94, 091907 (2009) The correlation between shear elastic modulus and glass transition temperature of bulk metallic glasses Zhibin Lu,1 Jiangong Li,1 Hang Shao,1 H. Gleiter,2 and Xia Ni1 1MOE Key Laboratory for Magnetism and Magnetic Materials, Institute of Materials Science and Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China 2Institut für Nanotechnologie, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany Based on Varshni equation, the shear elastic modulus at the glass transition temperature [G(Tg)] and the shear elastic modulus at 0 K [G(0)] were calculated from the elastic modulus measured at room temperature for various bulk metallic glasses (BMGs). The G(Tg)/G(0) ratios for various BMGs are almost the same and have a value around 0.85. This unique correlation implies that the glass transition occurs when the shear modulus of a BMG decreases to about 85% of G(0). This correlation between shear modulus and glass transition is of significance in understanding the glass transition of BMGs. ©2009 American Institute of Physics 7 Intermetallics - Article in Press, Corrected Proof Progress in studying the fatigue behavior of Zr-based bulk-metallic glasses and their composites G.Y. Wanga, P.K. Liawa and M.L. Morrisona aDepartment of Materials Science and Engineering, The University of Tennessee, 434 Dougherty Hall, Knoxville, TN 37996, USA Received 4 March 2008; revised 8 January 2009; accepted 30 January 2009. Available online 6 March 2009. Abstract Zr-based amorphous alloys with a high glass-forming ability and thermal stability were discovered in 1990. In the following years, the alloy design increased the critical casting thickness to several centimeters, and a homogeneous dispersion of nanoscale particles was found to improve the ductility. Therefore, Zr-based bulk-metallic glasses (BMGs) are being studied widely because of their potential as structural materials. The fatigue behavior is an important characteristic of structural materials. The current review documents the fatigue studies of Zr-based BMGs and their composites. The fatigue characteristics of these alloys in different loading conditions and environments are summarized and compared in this paper. The factors affecting the fatigue behavior of the Zr-based BMGs and their composites are discussed. The mechanisms of fatigue-crack initiation and propagation in BMGs are addressed in this review. In order to broaden the scope of applications of BMGs, a fundamental understanding of the fatigue behavior is important for the design of new alloy systems and the development of the processing techniques. Keywords: B. Glasses, metallic; B. Fatigue resistance and crack growth; F. Corrosion behaviour; F. Mechanical testing 8 Journal of Alloys and Compounds - Volume 473, Issues 1-2, Pages L1-L44, 1-594 (3 April 2009) (1). Crystallization of α-Fe phase in amorphous Fe81B13Si4C2 alloy Pages 363-367 D.M. Minić, A. Maričić, B. Adnađević (2). Synthesis of ferromagnetic Fe-based bulk glassy alloys in the Fe–Si–B–P–C system Pages 368-372 Chuntao Chang, Takeshi Kubota, Akihiro Makino, Akihisa Inoue 9 Journal of Alloys and Compounds - Volume 472, Issues 1-2, Pages L1-L26, 1-612 (20 March 2009) (1). Soft magnetic properties and glass formability of Y–Fe–B–M bulk metals (M = Al, Hf, Nb, Ta, and Ti) Pages 166-170 H.W. Chang, Y.C. Huang, C.W. Chang, C.C. Hsieh, W.C. Chang (2). Effect of strain rate on compressive behavior of Ti-based bulk metallic glass at room temperature Pages 214-218 Weifeng Ma, Hongchao Kou, Jinshan Li, Hui Chang, Lian Zhou [ Last edited by hslining on 2009-9-10 at 16:35 ] |
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