Impact fracture behavior of Zr-based bulk amorphous metal

被引：0
|
作者：
Shin, HS [1 ]
Ko, DK [1 ]
Jung, YJ [1 ]
Oh, SY [1 ]
Ahn, JH [1 ]
机构：
[1] Andong Natl Univ, Sch Mech Engn, Andong 760749, Kyungbuk, South Korea
来源：
ISMANAM 2003: METASTABLE, MECHANICALLY ALLOYED AND NANOCRYSTALLINE MATERIALS | 2004年 / 20-21卷
关键词：
bulk amorphous metal; fractography; impact fracture; instrumented impact test; loading rate; subsize specimen;
D O I：
10.4028/www.scientific.net/JMNM.20-21.95
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
An instrumented impact testing apparatus using small-size specimen that provides the load-displacement curve under impact loading without oscillations was used to investigate the fracture behavior in the Zr-based bulk amorphous metal (BAM). Influences of loading rate and notch shape on the fracture behavior of the Zr-based BAM were examined. In addition, fracture characteristics of BAMs under different conditions were investigated. The maximum load and absorbed fracture energy under impact loading are lower than those under quasi-static loading. The large part of the absorbed fracture energy in the Zr-based BAM was consumed in the process for crack initiation not for crack propagation. The Zr-based BAM showed significant notch sensitivity. Fracture surfaces under impact loading were smoother than that wider quasi-static loading. The absorbed fracture energy appeared different depending on the appearance of the shear bands developed. It can be found that the fracture PF energy of the Zr-based BAM was closely related with the development of shear bands during the fracture.
引用
收藏
页码：95 / 100
页数：6
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