@article{e40bf6acd3d84b76b1b5705c3384e0c0,
title = "Fatigue initiation and propagation behavior in bulk-metallic glasses under a bending load",
abstract = "Understanding how to predict the fatigue lifetimes of bulk-metallic glass (BMG) materials is crucially important for their selection as structural alloys. In our paper, the nature of likely fatigue mechanisms for BMGs is revealed. Fatigue cracks, arising from machining/polishing damage, were experimentally observed to initiate from shear bands near defects. At the crack tip, a plastic-zone creation is observed through the formation of many shear bands, and the fatigue crack is found to propagate along these shear bands. The size of the plastic zone can be characterized by fracture-mechanics quantities, and each fatigue cycle is seen to produce a fine striation instead of a single coarse one. We propose a shear-band mechanism to explain the characteristics of the observed fatigue cracking. Numerical computations, based on linear-elastic- fracture mechanics, yield reasonably good agreement with experiments. Our findings are significant to predict the fatigue lifetimes of these materials.",
author = "Gongyao Wang and Liaw, {Peter K.} and Xiaoqing Jin and Yoshihiko Yokoyama and Huang, {E. Wen} and Feng Jiang and Keer, {Leon M.} and Akihisa Inoue",
note = "Funding Information: The present work is supported by the National Science Foundation (NSF), the Combined Research-Curriculum Development (CRCD) Program, under Grant Nos. EEC-9527527 and EEC-0203415, the Integrative Graduate Education and Research Training (IGERT) Program, under Grant No. DGE-9987548, the International Materials Institutes (IMI) Program, under Grant No. DMR-0231320, the Major Research Instrumentation (MRI) Program, under Grant No. DMR-0421219, the Division of Civil, Mechanical, Manufacture, and Innovation Program, under Grant No. CMMI-0900271, and the Materials World Network Program, under Grant No. DMR-0909037, with Ms. M. Poats, and Drs. C. V. Hartesveldt, D. Dutta, P. W. Jennings, L. S. Goldberg, L. Clesceri, C. Huber, C. E. Bouldin, C. V. Cooper, A. Ardell, and D. Finotello as contract monitors. We are thankful to Mr. D. E. Fielden for machining samples. The use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The authors would like to thank Dr. Y. Ren for his kind help on the high-energy x-ray scattering measurements.",
year = "2010",
month = dec,
day = "1",
doi = "10.1063/1.3501102",
language = "English",
volume = "108",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "11",
}