Search Results - "Maaß, R."

Micro-plasticity and recent insights from intermittent and small-scale plasticity by Maaß, R., Derlet, P.M.

“…Prior to macroscopic yielding, most materials undergo a regime of plastic activity that cannot be resolved in conventional bulk deformation experiments. In…”
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Beyond Serrated Flow in Bulk Metallic Glasses: What Comes Next? by Maaß, R.

“…This manuscript is based on an oral contribution to the TMS 2020 annual meeting and is dedicated to Prof. Peter Liaw, who for decades has shown great interest…”
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Shapes and velocity relaxation of dislocation avalanches in Au and Nb microcrystals by Sparks, G., Maaß, R.

“…We capture the spatiotemporal velocity dynamics of dislocation avalanches in face-centered cubic (FCC) gold and body-centered cubic (BCC) niobium crystals by…”
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Shear-band thickness and shear-band cavities in a Zr-based metallic glass by Liu, C., Roddatis, V., Kenesei, P., Maaß, R.

“…Strain localization into shear bands in metallic glasses is typically described as a mechanism that occurs at the nano-scale, leaving behind a shear defect…”
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Structural dynamics and rejuvenation during cryogenic cycling in a Zr-based metallic glass by Das, A., Dufresne, E.M., Maaß, R.

“…Subjecting metallic glasses repeatedly to liquid nitrogen temperature has become a popular method to homogeneously rejuvenate the material. Here we reveal the…”
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Gamma relaxation in bulk metallic glasses by Küchemann, S., Maaß, R.

“…Studying the primary α- and secondary β-relaxation process has contributed significantly to the understanding of the structure and rheology of metallic…”
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Emergent structural length scales in a model binary glass - The micro-second molecular dynamics time-scale regime by Derlet, P.M., Maaß, R.

“…It is now possible to routinely perform atomistic simulations at the microsecond timescale. In the present work, we exploit this for a model binary…”
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A single shear band in a metallic glass: Local core and wide soft zone by Maaß, R., Samwer, K., Arnold, W., Volkert, C. A.

“…Two dimensional mapping of structural properties near a single shear band in a Zr-based bulk metallic glass reveals the presence of hardness and modulus…”
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Micro-plasticity in a fragile model binary glass by Derlet, P.M., Maaß, R.

“…[Display omitted] Atomistic deformation simulations in the nominally elastic regime are performed for a model binary glass with strain rates as low as 104/s…”
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Strain-dependent shear-band structure in a Zr-based bulk metallic glass by Liu, C., Ikeda, Y., Maaß, R.

“…This work presents strong evidence for structural damage accumulation as a function of shear strain admitted by shear bands in a Zr-based bulk metallic glass…”
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Deformation response of ferrite and martensite in a dual-phase steel by Ghassemi-Armaki, H., Maaß, R., Bhat, S.P., Sriram, S., Greer, J.R., Kumar, K.S.

“…Deformation response of ferrite and martensite in a commercially produced dual-phase sheet steel with a nominal composition of 0.15% C–1.45% Mn–0.30% Si (wt.%)…”
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Thermally-activated stress relaxation in a model amorphous solid and the formation of a system-spanning shear event by Derlet, P.M., Maaß, R.

“…Molecular dynamics simulations are performed to investigate the underlying thermally activated processes contributing to stress relaxation in a model binary…”
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Mild-to-wild plastic transition is governed by athermal screw dislocation slip in bcc Nb by Rizzardi, Q., McElfresh, C., Sparks, G., Stauffer, D. D., Marian, J., Maaß, R.

“…Plastic deformation in crystals is mediated by the motion of line defects known as dislocations. For decades, dislocation activity has been treated as a…”
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Unified Criterion for Temperature-Induced and Strain-Driven Glass Transitions in Metallic Glass by Yu, H B, Richert, R, Maaß, R, Samwer, K

“…In a model metallic glass, we study the relaxation dynamics in both the linear and the nonlinear response regimes by numerical simulations of dynamical…”
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Temperature rise from fracture in a Zr-based metallic glass by Das, A., Kagebein, P., Küchemann, S., Maaß, R.

“…Inhomogeneous serrated plastic flow and the subsequent fracture of a Zr-based metallic glass are probed by high-speed in-situ pyrometry and in-situ acoustic…”
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Annealing-dependent elastic microstructure in a Zr-based metallic glass by Rashidi, R., Riechers, B., Rosalie, J.M., Maaß, R.

“…In this letter, we demonstrate the robust presence of an elastic microstructure in a Zr-based metallic glass (MG) with a characteristic length-scale of the…”
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Evidence of room-temperature shear-deformation in a Cu-Al intermetallic by Ikeda, Y., Mancias, J., Gan, B., Maaß, R.

“…Lamellar eutectics are known to evidence plastic shear in otherwise brittle intermetallics, if the lamella spacing is small enough. Here we pursue this idea of…”
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Long range stress fields and cavitation along a shear band in a metallic glass: The local origin of fracture by Maaß, R., Birckigt, P., Borchers, C., Samwer, K., Volkert, C.A.

“…[Display omitted] Nanomechanical properties along a single shear band in a Zr-based metallic glass were studied. Spatial mapping of both indentation hardness…”
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Slip statistics of dislocation avalanches under different loading modes by Maass, R, Wraith, M, Uhl, J T, Greer, J R, Dahmen, K A

“…Slowly compressed microcrystals deform via intermittent slip events, observed as displacement jumps or stress drops. Experiments often use one of two loading…”
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In-situ characterization of the dislocation-structure evolution in Ni micro-pillars by Maaß, R., Uchic, M.D.

“…The high strength of micro-crystals is determined in the early flow regime, where a transition from elastic to plastic flow is obscured if compared to…”
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