Plastic deformation studies of Zr-based bulk metallic glassy samples with a low aspect ratio

Room‐temperature dynamic quasi‐elastic mechanical behavior of a Zr–Cu–Fe–Al bulk metallic glass

“…This leads to the conclusion that with the progression of plastic deformation the samples storage modulus should decrease. However, the accumulation of atomic local stresses in the non‐deformed glassy matrix by not well developed shear bands led to the increase in the overall sample hardness due to the intensification of the stresses in the plastically undistorted matrix similar to the results of the present study. Therefore, one can see that the elastic cyclic loading leads to the increase of the storage modulus, and in the case of plastic flow the effect can be even more pronounced.…”

The mechanism of power-law scaling behavior by controlling shear bands in bulk metallic glass

“…Intensive plastic deformation of BMG with a large number of shear bands before intensive crack initiation is supposed to have effects on its properties. The plastically and elastically deformed areas may release significant amount of extra heat upon structural relaxation [40]. The region that is marked with the pink rectangle possesses most of the fracture surface.…”

Properties of Bulk Metallic Glasses

“…Более того, следует заметить, что недавно были разработаны сплавы ОМС Zr 61 Ti 2 Cu 25 Al 12 [23] и Pd 79 Ag 3,5 P 6 Si 9,5 Ge 2 [24], об-ладающие рекордно высокой вязкостью разруше-ния -порядка 100 МПа·√ -м. Была также обнаруже-на неупругая однородная деформация в аморфной матрице после снятия упругой [25] и пластической [26,27] деформаций.…”

“…Образцы с соотно-шением высоты к диаметру ≤1 показывают высо-кую пластичность [27,52] образцов Zr-Ti-Ni-Cu-Be с надрезом при вве-дении усталостных трещин была значительно ни-же -18,4±1,4 МПа·√ -м [54]. Это свидетельствует о высокой чувствительности ОМС к микроскопи-ческим дефектам и концентраторам напряжений.…”