Effect of Hydrogen Charging on Pop-in Behavior of a Zr-Based Metallic Glass

Tian, Lin; Tönnies, Dominik; Hirsbrunner, Moritz; Sievert, Tim; Shan, Zhiwei; Volkert, Cynthia A.

doi:10.3390/met10010022

Cited by 9 publications

(2 citation statements)

References 41 publications

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“…They also showed that H charging decreased the critical stress for pop-in and discussed the effect of a reduction in the elastic self-energy of dislocations for a homogeneous dislocation nucleation model. Tian et al recently reported an interesting experimental study of the effect of H on the mechanical behavior of Zr-based bulk metallic glass (BMG) [ 128 ]. They showed that H charging increased the pop-in critical load, as well as Young’s modulus and the hardness of the BMG material, which is the antithesis of the trend in crystalline materials.…”

Section: Effect Of Pre-existing Lattice Defectsmentioning

confidence: 99%

Pop-In Phenomenon as a Fundamental Plasticity Probed by Nanoindentation Technique

Ohmura

Wakeda

2021

Materials

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The attractive strain burst phenomenon, so-called “pop-in”, during indentation-induced deformation at a very small scale is discussed as a fundamental deformation behavior in various materials. The nanoindentation technique can probe a mechanical response to a very low applied load, and the behavior can be mechanically and physically analyzed. The pop-in phenomenon can be understood as incipient plasticity under an indentation load, and dislocation nucleation at a small volume is a major mechanism for the event. Experimental and computational studies of the pop-in phenomenon are reviewed in terms of pioneering discovery, experimental clarification, physical modeling in the thermally activated process, crystal plasticity, effects of pre-existing lattice defects including dislocations, in-solution alloying elements, and grain boundaries, as well as atomistic modeling in computational simulation. The related non-dislocation behaviors are also discussed in a shear transformation zone in bulk metallic glass materials and phase transformation in semiconductors and metals. A future perspective from both engineering and scientific views is finally provided for further interpretation of the mechanical behaviors of materials.

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Section: Effect Of Pre-existing Lattice Defectsmentioning

confidence: 99%

Pop-In Phenomenon as a Fundamental Plasticity Probed by Nanoindentation Technique

Ohmura

Wakeda

2021

Materials

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“…Tian et al [2] studied the structural and mechanical properties of hydrogen-charged metallic glass. They found that nanoindentation reveal a clear increase in the elastic modulus and hardness as well as in the load of the first pop-in with increasing hydrogen content.…”

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confidence: 99%