Fracture mechanism of some brittle metallic glasses

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	Fracture mechanism of some brittle metallic glasses
	J. X. Zhao; R. T. Qu; F. F. Wu; Z. F. Zhang; B. L. Shen; M. Stoica; J. Eckert
	2009
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	105 期号:10
摘要	A systematic study on the fracture surface of brittle Mg-, Fe-, and Co-based metallic glasses under compressive loading is approached and a fracture mechanism is proposed. Experimentally, the metallic glass samples are compressed into many small fragments, displaying an explosion fracture feature. Therefore, an energy equilibrium model is employed to describe the fracture processes of those brittle metallic glasses. Furthermore, some regular nanoscale steps, which were scarcely discovered, are found on the mirror region on their fracture surfaces. It is suggested that such nanoscale steps are associated with the energy distribution in metallic glasses and are created by the shear waves generated by the instability of crack propagation during the explosion rupture processes. Based on the comparison of experimental observations with numerical calculations, we recommend a novel model for interpreting the development of nanoscale steps on the dynamic fracture surfaces of these brittle metallic glasses, which appropriately describes the experimental findings.
部门归属	[zhao, j. x.; qu, r. t.; wu, f. f.; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [wu, f. f.] liaoning univ technol, sch mat & chem engn, jinzhou 121001, peoples r china. [shen, b. l.] chinese acad sci, ningbo inst mat technol & engn, ningbo 315201, zhejiang, peoples r china. [stoica, m.; eckert, j.] ifw dresden, inst complex mat, d-01171 dresden, germany. [eckert, j.] tech univ dresden, inst mat sci, d-01062 dresden, germany.;zhang, zf (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china;zhfzhang@imr.ac.cn
关键词	Brittle Fracture Brittleness Cobalt Alloys Cracks Elastic Waves Iron Alloys Magnesium Alloys Metallic Glasses Bulk Amorphous-alloys Energy-dissipation Crack-propagation Dynamic Fracture Instability Strength
URL	查看原文
WOS记录号	WOS:000266500100088
引用统计	被引频次：33[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32597
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. X. Zhao,R. T. Qu,F. F. Wu,et al. Fracture mechanism of some brittle metallic glasses[J]. Journal of Applied Physics,2009,105(10).
APA	J. X. Zhao.,R. T. Qu.,F. F. Wu.,Z. F. Zhang.,B. L. Shen.,...&J. Eckert.(2009).Fracture mechanism of some brittle metallic glasses.Journal of Applied Physics,105(10).
MLA	J. X. Zhao,et al."Fracture mechanism of some brittle metallic glasses".Journal of Applied Physics 105.10(2009).