[1]李福山,孔超,杨会智,等.Zr基块状金属玻璃在准静态弯曲下的力学行为[J].郑州大学学报(工学版),2009,30(04):89-92.
　LI Fushan,KONG Chao,YANG Huizhi,et al.Mechanical Behavior of Zr．based Bulk Metallic Glass under Quasi-static Bending Stress[J].Journal of Zhengzhou University (Engineering Science),2009,30(04):89-92.
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Zr基块状金属玻璃在准静态弯曲下的力学行为()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
30
期数:
2009年04期
页码:
89-92
栏目:
出版日期:
1900-01-01

文章信息/Info

Title:
Mechanical Behavior of Zr．based Bulk Metallic Glass under Quasi-static Bending Stress
作者:
李福山; 孔超; 杨会智; 等.
郑州大学材料科学与工程学院,河南郑州,450001, 河南工程学院数理科学系,河南郑州,451191
Author(s):
LI Fushan; KONG Chao; YANG Huizhi; etc
1．School of Material Science and Engineering，Zhengzhou University，Zhengzhou 450001，China；2．Department of Mathematical and Physical Sciences，Henan Engineering Institute，Zhengzhou 45 1 1 91，China
关键词:
块状金属玻璃;  三点弯曲;  机械性能;  自由体积
Keywords:
bulk metallic glass; three—point bending; mechanical properties; free volume
文献标志码:
A
摘要:
利用三点弯曲的方法,研究了Zr-Cu-Al-Ni系块状金属玻璃的准静态弯曲变形和断裂行为.在室温下,准静态三点弯曲变形过程主要表现为弹性和塑性变形,塑性变形阶段没有出现加工硬化现象并且锯齿形流变不显著,挠度值最高为4.11 mm,显示出较好的塑性.SEM分析发现:弯曲试样受力状态复杂,表面剪切带并不是沿理论最大切应力方向扩展,弯曲试样内部压应力区的断口形貌与压缩实验断口相似,主要为脉状断口;不同的是在单向拉伸时呈现菊花状形貌,而在拉应力区,呈现出复杂的网状形貌,并发现大量的微孔和微裂纹,表明剪切带的形成与
Abstract:
The deformation and fracture behavior under bending of bulk metallic glass Zr65 Cul5 Nilo A1lo wasstudied using three—point bending machine and scanning electron microscopy(SEM)at room temperature．The results indicate that the samples experience elastic and plastic deformation process before fracture，and noobvious serrated rheological change and work hardening is found during plastic deformation．The biggest deflection value of specimens reaches 4．1 1 mm，which exhibits better plasticity．Shear bands do not propagate a—long the direction of theoretical maximum stress because of complex stress state．The fracture surface is typicalvein—pattern in compressive stress regions，which is the same as fracture surface in compressive test．Corn—plex reticular patterns are observed under different stress states in tension regions，and micro—scale voids andcracks exit along the shear bands，showing that the formation of shear bands is associated with free volume．

相似文献/References:

[1]李福山,袁静慧,黄凤勇,等.Co对Fe-Mo-P-C-B-Si块状金属玻璃化学腐蚀行为的影响[J].郑州大学学报(工学版),2009,30(02):95.
　LI Fushan,YUAN Jinghui,HUANG Fengyong,et al.Effect of Co on Chemical Corrosion Behavior of Fe-Mo-P-C-B-Si Bulk Metallic Glass[J].Journal of Zhengzhou University (Engineering Science),2009,30(04):95.

更新日期/Last Update: 1900-01-01