Fracture behavior of Zr55Cu30Al10Ni5 bulk metallic glass under quasi-static and dynamic compression

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	Fracture behavior of Zr55Cu30Al10Ni5 bulk metallic glass under quasi-static and dynamic compression
	R. Q. Yang; J. T. Fan; S. X. Li; Z. F. Zhang
	2008
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	23 期号:6 页码:1744-1750
摘要	Fracture behavior of Zr55Cu30Al10Ni5 bulk metallic glass was investigated under quasi-static compression at strain rate of 10(-4)/s using an Instron testing machine and dynamic split Hopkinson bar (SHPB) compression with strain rate of about 1900-4300/s. Pronounced strain softening, especially past the peak stress, was observed under SHPB tests and compared with the distinct flow serrations under quasi-static tests. Scanning electron microscope revealed that the angle between the loading axis and major shear plane is less than 45 degrees, deviating from the maximum shear stress plane. Microscopically, unlike the ordinary veinlike pattern found in quasi-static compression, the elongated veinlike pattern was observed at the onset position of rapid shearing under dynamic test. A closely arrayed dendritelike structure dominated the dynamic fracture, consequently, and should be the major pattern representing the rapid shear band propagation. In addition, a transition state from veinlike to dendritelike pattern was observed at the final instantaneous fracture region in quasi-static tests. Evidence revealed the characteristic dimension of dynamic fracture surface complies with Taylor's meniscus instability criterion. The roles of free volume and adiabatic heating on the fracture strength and stress concentration on the fracture morphology are also discussed.
部门归属	[yang, r. q.; fan, j. t.; li, s. x.; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;zhang, zf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;zhfzhang@imr.ac.cn
关键词	Ni-cu-be Amorphous-alloys Plastic-flow Strain-rate Hydrostatic-pressure Deformation-behavior Toughness Dependence Mechanism Strength
URL	查看原文
WOS记录号	WOS:000256392600031
引用统计	被引频次：29[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/321006/33276
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. Q. Yang,J. T. Fan,S. X. Li,et al. Fracture behavior of Zr55Cu30Al10Ni5 bulk metallic glass under quasi-static and dynamic compression[J]. Journal of Materials Research,2008,23(6):1744-1750.
APA	R. Q. Yang,J. T. Fan,S. X. Li,&Z. F. Zhang.(2008).Fracture behavior of Zr55Cu30Al10Ni5 bulk metallic glass under quasi-static and dynamic compression.Journal of Materials Research,23(6),1744-1750.
MLA	R. Q. Yang,et al."Fracture behavior of Zr55Cu30Al10Ni5 bulk metallic glass under quasi-static and dynamic compression".Journal of Materials Research 23.6(2008):1744-1750.