TY - GEN
T1 - The effects of annealing on fatigue behavior in Zr-based bulk metallic glasses
AU - Tong, Peng
AU - Louca, Despina
AU - Yokoyama, Yoshihiko
AU - Llobet, Anna
AU - Wang, Gongyao
AU - Shi, Yunfeng
AU - Liaw, Peter
AU - King, Graham
AU - Spence, Rick
N1 - Funding Information:
Support for this work was provided by the National Science Foundation, under contracts DMR-0804801, DMR-0421219, DMR-0909037 and CMMI-0900271. The use of the Advanced Photon Source was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The Los Alamos National Laboratory is operated by the Los Alamos National security LLC.
PY - 2011
Y1 - 2011
N2 - The effects of annealing and fatigue on the local structure of Zr 50&Cu 40Al 10 and Zr 60Cu 30Al 10 bulk metallic glasses (BMG) were investigated using the pair density function (PDF) analysis of synchrotron X-ray and neutron diffraction data. Our results indicate that the two compositions respond differently to annealing. The first PDF peak becomes sharper after annealing in Zr 50Cu 40Al 10 with its intensity increasing, indicating that short-range ordering may be induced after the heat treatment. On the other hand, in Zr 10Cu 30Al 10, the effects due to the heat treatment on the local structure are more subtle. Separately, the as-quenched and annealed alloys with the composition Zr 50Cu 40Al 10 were subjected to fatigue loading conditions with ∼ 10 6 compression cycles. The room temperature measurements showed changes in the local structure with fatigue especially for the annealed sample, involving the Cu-Zr correlations. Our results suggest that the physical properties of BMGs upon fatigue loading conditions may become accentuated due to the structural relaxation brought upon by annealing, leading to observable structural changes at the atomic level from fatigue.
AB - The effects of annealing and fatigue on the local structure of Zr 50&Cu 40Al 10 and Zr 60Cu 30Al 10 bulk metallic glasses (BMG) were investigated using the pair density function (PDF) analysis of synchrotron X-ray and neutron diffraction data. Our results indicate that the two compositions respond differently to annealing. The first PDF peak becomes sharper after annealing in Zr 50Cu 40Al 10 with its intensity increasing, indicating that short-range ordering may be induced after the heat treatment. On the other hand, in Zr 10Cu 30Al 10, the effects due to the heat treatment on the local structure are more subtle. Separately, the as-quenched and annealed alloys with the composition Zr 50Cu 40Al 10 were subjected to fatigue loading conditions with ∼ 10 6 compression cycles. The room temperature measurements showed changes in the local structure with fatigue especially for the annealed sample, involving the Cu-Zr correlations. Our results suggest that the physical properties of BMGs upon fatigue loading conditions may become accentuated due to the structural relaxation brought upon by annealing, leading to observable structural changes at the atomic level from fatigue.
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U2 - 10.1557/opl.2011.275
DO - 10.1557/opl.2011.275
M3 - Conference contribution
AN - SCOPUS:84859040078
SN - 9781618395108
T3 - Materials Research Society Symposium Proceedings
SP - 30
EP - 35
BT - Bulk Metallic Glasses and their Applications
T2 - 2010 MRS Fall Meeting
Y2 - 29 November 2010 through 3 December 2010
ER -