TY - JOUR
T1 - Fracture toughness of metallic glasses
T2 - Annealing-induced embrittlement
AU - Rycroft, Chris H.
AU - Bouchbinder, Eran
N1 - Minerva Foundation; Federal German Ministry for Education and Research; Israel Science Foundation [712/12]; Harold Perlman Family Foundation; William Z. and Eda Bess Novick Young Scientist Fund; Office of Science, Computational and Technology Research, U.S. Department of Energy [DE-AC02-05CH11231]E. B. acknowledges support from the Minerva Foundation with funding from the Federal German Ministry for Education and Research, from the Israel Science Foundation (Grant No. 712/12), the Harold Perlman Family Foundation, and the William Z. and Eda Bess Novick Young Scientist Fund. C. H. R. was supported by the Director, Office of Science, Computational and Technology Research, U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
PY - 2012/11/7
Y1 - 2012/11/7
N2 - Quantitative understanding of the fracture toughness of metallic glasses, including the associated ductile-to-brittle (embrittlement) transitions, is not yet available. Here, we use a simple model of plastic deformation in glasses, coupled to an advanced Eulerian level set formulation for solving complex free-boundary problems, to calculate the fracture toughness of metallic glasses as a function of the degree of structural relaxation corresponding to different annealing times near the glass temperature. Our main result indicates the existence of an elastoplastic crack tip instability for sufficiently relaxed glasses, resulting in a marked drop in the toughness, which we interpret as annealing-induced embrittlement transition similar to experimental observations.
AB - Quantitative understanding of the fracture toughness of metallic glasses, including the associated ductile-to-brittle (embrittlement) transitions, is not yet available. Here, we use a simple model of plastic deformation in glasses, coupled to an advanced Eulerian level set formulation for solving complex free-boundary problems, to calculate the fracture toughness of metallic glasses as a function of the degree of structural relaxation corresponding to different annealing times near the glass temperature. Our main result indicates the existence of an elastoplastic crack tip instability for sufficiently relaxed glasses, resulting in a marked drop in the toughness, which we interpret as annealing-induced embrittlement transition similar to experimental observations.
UR - http://www.scopus.com/inward/record.url?scp=84869050763&partnerID=8YFLogxK
U2 - https://doi.org/10.1103/PhysRevLett.109.194301
DO - https://doi.org/10.1103/PhysRevLett.109.194301
M3 - مقالة
SN - 0031-9007
VL - 109
JO - Physical review letters
JF - Physical review letters
IS - 19
M1 - 194301
ER -