Recently, nanoglass (NG) was found to exhibit a surprising homogeneous superplastic deformation behavior. However, how the presence of notch affects its mechanical properties remains unexplored. Here, we perform molecular dynamics simulations on a superplastic Cu50Zr50 NG containing a pre-existing notch under tensile loading, with focus on the notch sensitivity. Our results show that when the notch size is smaller than or comparable to the average grain size (d), the NG still exhibits a superplastic deformation and shows notch-insensitivity. When the notch size is larger than d, however, the NG fails by localized shear banding emanating from the notch root and shows notch-sensitivity. The origin of this transition arises from the competition between the shear band nucleation induced by the stress concentration at the notch root and the growth of shear transformation zones distributed in the glass-glass interfaces. Our results provide useful guidelines for the design and engineering of NG with notch for structural applications.
Skip Nav Destination
Article navigation
28 April 2014
Research Article|
April 23 2014
On the notch sensitivity of CuZr nanoglass
Z. D. Sha;
Z. D. Sha
1International Center for Applied Mechanics,
State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University
, Xi'an 710049, China
Search for other works by this author on:
L. C. He;
L. C. He
1International Center for Applied Mechanics,
State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University
, Xi'an 710049, China
Search for other works by this author on:
Q. X. Pei;
Q. X. Pei
2
Institute of High Performance Computing
, A*Star, 138632, Singapore
Search for other works by this author on:
H. Pan;
H. Pan
3Faculty of Science and Technology,
University of Macau
, Macau SAR, China
Search for other works by this author on:
Z. S. Liu;
Z. S. Liu
a)
1International Center for Applied Mechanics,
State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University
, Xi'an 710049, China
Search for other works by this author on:
Y. W. Zhang;
Y. W. Zhang
b)
2
Institute of High Performance Computing
, A*Star, 138632, Singapore
Search for other works by this author on:
T. J. Wang
T. J. Wang
c)
4State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering,
Xi'an Jiaotong University
, Xi'an 710049, China
Search for other works by this author on:
a)
E-mail address: zishunliu@mail.xjtu.edu.cn
b)
E-mail address: zhangyw@ihpc.a-star.edu.sg
c)
E-mail address: wangtj@mail.xjtu.edu.cn
J. Appl. Phys. 115, 163507 (2014)
Article history
Received:
January 10 2014
Accepted:
April 14 2014
Citation
Z. D. Sha, L. C. He, Q. X. Pei, H. Pan, Z. S. Liu, Y. W. Zhang, T. J. Wang; On the notch sensitivity of CuZr nanoglass. J. Appl. Phys. 28 April 2014; 115 (16): 163507. https://doi.org/10.1063/1.4873238
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00