Deformation localization in constrained layers of metallic glasses: A parametric modeling analysis

Rogers, D.N.; Shen, Yansong

doi:10.1016/j.tsf.2013.05.170

Cited by 2 publications

(1 citation statement)

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“…The weak points have the same elastic-plastic properties as the regular BMG material, except for a built-in softening response upon yielding. This approach has been used successfully to numerically study shear-banding phenomena in metallic glasses [26,27]. The Young's modulus, Poisson's ratio, and yield strength of the TFMG coating are taken to be 124 GPa, 0.37, and 2.93 GPa, respectively.…”

Section: Fatigue Modelmentioning

confidence: 99%

Influence of thin-film metallic glass coating on fatigue behavior of bulk metallic glass: Experiments and finite element modeling

Chu

Jia

et al. 2017

Materials Science and Engineering: A

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A coating of the Zr-based thin-film metallic glass (TFMG) was deposited on the Zr 50 Cu 30 Al 10 Ni 10 bulk metallic glass (BMG) to investigate shear-band evolution under fourpoint-bend fatigue testing. The fatigue endurance-limit of the TFMG-coated samples is ~ 33% higher than that of the BMG. The results of finite-element modeling (FEM) revealed a delay in the shear-band nucleation and propagation in TFMG-coated samples under applied cyclicloading. The FEM study of spherical indentation showed that the redistribution of stress by the TFMG coating prevents localized shear-banding in the BMG substrate. The enhanced fatigue characteristics of the BMG substrates can be attributed to the TFMG coatings retarding shear-band initiation at defects on the surface of the BMG.

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Section: Fatigue Modelmentioning

confidence: 99%