TY - JOUR
T1 - Microstructure in a Ni60Pd20P17B3 bulk metallic glass compressively fractured at cryogenic temperature
AU - Kawashima, Asahi
AU - Zeng, Yuqiao
AU - Xie, Guoqiang
AU - Nishiyama, Nobuyuki
AU - Inoue, Akihisa
PY - 2010/11/25
Y1 - 2010/11/25
N2 - In order to clarify relationship between plasticity and microstructure for a Ni60Pd20P17B3 bulk metallic glass (BMG) at cryogenic temperature, we investigated the microstructures of both the shear band and fracture surface for the BMG compressively fractured at room temperature (RT) and 77K (liquid Nitrogen temperature) using transmission electron microscopy (TEM). HRTEM images from the BMG fractured at 77K clearly reveal that there are nanocrystalline particles around both shear band and fracture surface, but not in undeformed region. The sizes of the particles fractured at 77K are smaller than those fractured at RT. These particles ranged from 3 to 5nm in size are thought to consist of an fcc palladium-nickel solid solution phase. The particles with smaller size and the ductile fcc phase may effectively restrain the propagation of shear bands, resulting in enhancement of plastic deformation at cryogenic temperature.
AB - In order to clarify relationship between plasticity and microstructure for a Ni60Pd20P17B3 bulk metallic glass (BMG) at cryogenic temperature, we investigated the microstructures of both the shear band and fracture surface for the BMG compressively fractured at room temperature (RT) and 77K (liquid Nitrogen temperature) using transmission electron microscopy (TEM). HRTEM images from the BMG fractured at 77K clearly reveal that there are nanocrystalline particles around both shear band and fracture surface, but not in undeformed region. The sizes of the particles fractured at 77K are smaller than those fractured at RT. These particles ranged from 3 to 5nm in size are thought to consist of an fcc palladium-nickel solid solution phase. The particles with smaller size and the ductile fcc phase may effectively restrain the propagation of shear bands, resulting in enhancement of plastic deformation at cryogenic temperature.
KW - Bulk metallic glass
KW - Cryogenic temperature
KW - Deformation-induced crystallization
KW - Microstructure
KW - Shear band
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U2 - 10.1016/j.msea.2010.09.029
DO - 10.1016/j.msea.2010.09.029
M3 - Article
AN - SCOPUS:77958494388
SN - 0921-5093
VL - 528
SP - 391
EP - 396
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
IS - 1
ER -