TY - GEN
T1 - On the brittleness of bulk metallic glasses
AU - Keryvin, V.
AU - Bernard, C.
AU - Sangleboeuf, J. C.
AU - Yokoyama, Y.
AU - Rouxel, T.
PY - 2005
Y1 - 2005
N2 - Fracture toughness studies are conducted on a Zr-based bulk metallic glass at room and low (77 K) temperatures. Samples, cast by different processing techniques, contain either crystalline defects or not. For SENB specimens containing 30 μm root radius notches, results indicate that a perfect glass without quenched-in defects is ductile at room temperature and brittle at low temperature (toughness of 72 MPa.m0.5). On the contrary, imperfect glasses are brittle at room temperatures (toughness of 50 MPa.m0.5) and brittler at low temperature (27 MPa.m0.5). Fractographic observations clearly show the embrittlement caused by the dendrites at these two temperatures. These results are discussed on the basis of previous fracture studies with respect to the oxygen content in the samples.
AB - Fracture toughness studies are conducted on a Zr-based bulk metallic glass at room and low (77 K) temperatures. Samples, cast by different processing techniques, contain either crystalline defects or not. For SENB specimens containing 30 μm root radius notches, results indicate that a perfect glass without quenched-in defects is ductile at room temperature and brittle at low temperature (toughness of 72 MPa.m0.5). On the contrary, imperfect glasses are brittle at room temperatures (toughness of 50 MPa.m0.5) and brittler at low temperature (27 MPa.m0.5). Fractographic observations clearly show the embrittlement caused by the dendrites at these two temperatures. These results are discussed on the basis of previous fracture studies with respect to the oxygen content in the samples.
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M3 - Conference contribution
AN - SCOPUS:84869804379
SN - 9781617820632
T3 - 11th International Conference on Fracture 2005, ICF11
SP - 3016
EP - 3021
BT - 11th International Conference on Fracture 2005, ICF11
T2 - 11th International Conference on Fracture 2005, ICF11
Y2 - 20 March 2005 through 25 March 2005
ER -