Effects of noble metal additons on plastic deformation of Zr-Cu-Ni-Al based bulk metallic glasses

被引：0
|
作者：
Yamasaki T. [1 ]
Yamada M. [2 ,6 ]
Fujita K. [3 ]
Kato H. [4 ]
Kim D.H. [5 ]
机构：
[1] Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji
[2] Graduate School of Engineering, University of Hyogo, Himeji
[3] Department of Mechanical Engineering, National Institute of Technology, Ube College, 2-14-1 Tokiwa-dai, Ube
[4] Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai
[5] Department of Materials Science and Engineering, Yonsei University, Seoul
[6] NTN Corporation, 1-3-17 kyomachibori, Nishi-ku, Osaka
来源：
Yamasaki, Tohru (yamasaki@u-hyogo.ac.jp) | 2016年 / Journal of the Japan Society of Powder and Powder Metallurgy, 15 Morimoto-cho Shimogamo, Sakyo-Ku Kyoto, Japan卷 / 63期
关键词：
Bulk metallic glass; Effects of noble metals; Plastic deformation; Zr-Cu-Ni-Al alloy;
D O I：
10.2497/jjspm.63.230
中图分类号：
学科分类号：
摘要：
Zr-Cu-Ni-Al bulk metallic glasses (BMGs) have been limited in practical applications because of their low ductility under tensile and compressive testing conditions. This may be due to the formation of highly localized shear bands during plastic deformation. In this study, effects of Pd, Pt, Au and Ag additions on mechanical properties of Zr-Cu-Ni-Al BMGs have been examined. By the noble metal additions, precipitation of the icosahedral quasicrystal phase (I-phase) in the supercooled liquids was observed. Compression tests were carried out in these BMGs at an initial strain rate of 1 × 10-4 s-1 at room temperature. Especially, in the case of the Au-addition, large plastic deformation was observed and many shear bands were also observed in wide region of the side-surface of the fractured specimens. This may be due to dynamic precipitations of nanocrystalline particles inside the shear bands during compressive deformation that prevent the propagations of the deformation shear bands.
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页码：230 / 238
页数：8
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