Structural changes in Zr-based bulk metallic glasses deformed by high pressure torsion

被引：15
|
作者：
Revesz, Adam [1 ]
Henits, Peter [1 ]
Kovacs, Zsolt [1 ,2 ]
机构：
[1] Eotvos Lorand Univ, Dept Mat Phys, H-1518 Budapest, Hungary
[2] Natl Univ Ireland Univ Coll Dublin, Sch Elect Elect & Mech Engn, Dublin 4, Ireland
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 495卷 / 02期
基金：
匈牙利科学研究基金会;
关键词：
Metallic glasses; Mechanical properties; Synchrotron radiation; X-ray diffraction; Calorimetry; PLASTIC-DEFORMATION; VOLUME;
D O I：
10.1016/j.jallcom.2009.10.175
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Zr(44)Ti(11)Cu(10)Ni(10)Be(25) and Zr(57)Ti(5)Cu(20)Al(10)Ni(8) bulk metallic glass disks have been subjected to severe plastic deformation by high pressure torsion Structural changes occurred during torsion straining were detected by high intensity synchrotron X-ray diffraction, modulated thermal analysis and hardness measurements. The samples show no evidence of nanocrystallization, however, they posses atomic bond length change in the amorphous state. Simultaneously, a change in the heat capacity of the deformed state is detected which is preserved above the glass transition in the supercooled liquid range (C) 2009 Elsevier B V. All rights reserved
引用
收藏
页码：338 / 340
页数：3
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