TY - JOUR
T1 - Effects of cryogenic temperatures on mechanical behavior of a Zr60Ni25Al15 bulk metallic glass
AU - Li, Y. H.
AU - Zhang, W.
AU - Dong, C.
AU - Kawashima, A.
AU - Makino, A.
AU - Liaw, P. K.
N1 - Funding Information:
This work is financially supported by “the Fundamental Research Funds for the Central Universities” of China (Nos. DUT11RC(3)70 and DUT11RC(3)29) , the Natural Science Foundation of China (NSFC, Nos. 51201024 and 51171034 ), and the China Postdoctoral Science Foundation funded project (No. 2012M510802 ).
PY - 2013/11/1
Y1 - 2013/11/1
N2 - The effects of cryogenic temperatures on mechanical behavior of a Zr60Ni25Al15 bulk metallic glass (BMG) with high glass-forming ability were investigated. With lowering the temperature from 293K to 77K, the compressive yield stress of the BMG increases from 1791MPa to 2217MPa, and the compressive plastic strain enhances from 3.5% to 16.7%. Similarly, the BMG exhibits an enhanced tensile fracture stress of 2036MPa and a distinct tensile plastic strain of 0.14% at 77K, compared to those of 1743MPa and 0 at 293K, respectively. In addition, the elastic moduli and Debye temperature of the BMG increase monotonously with decreasing temperature. The mechanisms of enhanced strength and plasticity of BMGs at cryogenic temperatures are discussed in terms of the inter-atomic bonding and the mobility and coalescence of free volumes.
AB - The effects of cryogenic temperatures on mechanical behavior of a Zr60Ni25Al15 bulk metallic glass (BMG) with high glass-forming ability were investigated. With lowering the temperature from 293K to 77K, the compressive yield stress of the BMG increases from 1791MPa to 2217MPa, and the compressive plastic strain enhances from 3.5% to 16.7%. Similarly, the BMG exhibits an enhanced tensile fracture stress of 2036MPa and a distinct tensile plastic strain of 0.14% at 77K, compared to those of 1743MPa and 0 at 293K, respectively. In addition, the elastic moduli and Debye temperature of the BMG increase monotonously with decreasing temperature. The mechanisms of enhanced strength and plasticity of BMGs at cryogenic temperatures are discussed in terms of the inter-atomic bonding and the mobility and coalescence of free volumes.
KW - Bulk metallic glasses
KW - Cryogenic temperatures
KW - Mechanical properties
KW - Plasticity
KW - Shear bands
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U2 - 10.1016/j.msea.2013.06.063
DO - 10.1016/j.msea.2013.06.063
M3 - Article
AN - SCOPUS:84883003001
SN - 0921-5093
VL - 584
SP - 7
EP - 13
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -