Zobrazeno 1 - 10
of 511
pro vyhledávání: '"Alava, Mikko"'
Metallic glasses have mechanical properties, which exhibit avalanches in the disguise of stress drops. We study these phenomena in a classical metallic glass system CuZrAl by athermal quasistatic shear and varying the element concentrations and for p
Externí odkaz:
http://arxiv.org/abs/2409.15058
We revisit the problem of describing creep in heterogeneous materials by an effective temperature by considering more realistic (and complex) non-mean-field elastic redistribution kernels. We show first, from theoretical considerations, that, if elas
Externí odkaz:
http://arxiv.org/abs/2409.01766
We study a three-component CuZrAl metallic glass system by means of a combined Monte Carlo and Molecular Dynamics simulations scheme. This hybrid method allows us to generate equilibrated samples at temperatures below the conventional glass transitio
Externí odkaz:
http://arxiv.org/abs/2309.05806
Autor:
Kinnunen, Anniina, Lomakin, Ivan V., Mäkinen, Tero, Widell, Kim, Koivisto, Juha, Alava, Mikko J.
Publikováno v:
Phys. Rev. Materials 7, 053602, 2023
Fatigue failure of crystalline materials is a difficult problem in science and engineering, and recent results have shown that fatigue crack growth can occur in intermittent jumps which have fat-tailed distributions. As fatigue crack propagation is k
Externí odkaz:
http://arxiv.org/abs/2305.07460
Autor:
Pournajar, Mahshid, Mäkinen, Tero, Hosseini, Seyyed Ahmad, Moretti, Paolo, Alava, Mikko, Zaiser, Michael
Quasi-brittle materials endowed with (statistically) self-similar hierarcical microstructures show distinct failure patterns that deviate from the standard scenario of damage accumulation followed by crack nucleation-and-growth. Here we study the fai
Externí odkaz:
http://arxiv.org/abs/2303.09214
Autor:
Bonfanti, Silvia, Guerra, Roberto, Alvarez-Donado, Rene, Sobkowicz, Pawel, Zapperi, Stefano, Alava, Mikko
High Entropy Alloys (HEAs) are designed by mixing multiple metallic species in nearly the same amount to obtain crystalline or amorphous materials with exceptional mechanical properties. Here we use molecular dynamics simulations to investigate the r
Externí odkaz:
http://arxiv.org/abs/2303.09161
Autor:
Karimi, Kamran, Salmenjoki, Henri, Mulewska, Katarzyna, Kurpaska, Lukasz, Kosińska, Anna, Alava, Mikko, Papanikolaou, Stefanos
As a bulk mechanical property, nanoscale hardness in polycrystalline metals is strongly dependent on microstructural features that are believed to be heavily influenced from complex features of polycrystallinity -- namely, individual grain orientatio
Externí odkaz:
http://arxiv.org/abs/2212.10948
Autor:
Mäkinen, Tero, Zaborowska, Agata, Frelek-Kozak, Małgorzata, Jóźwik, Iwona, Kurpaska, Łukasz, Papanikolaou, Stefanos, Alava, Mikko J.
Publikováno v:
Physical Review Materials 6, 103601, 2022
There are a multitude of applications in which structural materials would be desired to be nondestructively evaluated, while in a component, for plasticity and failure characteristics. In this way, safety and resilience features can be significantly
Externí odkaz:
http://arxiv.org/abs/2211.04794
Publikováno v:
Physical Review Materials 6, L070601, 2022
Wood deformation, in particular when subject to compression, exhibits scale-free avalanche-like behavior as well as structure-dependent localization of deformation. We have taken three-dimensional (3D) x-ray tomographs during compression with constan
Externí odkaz:
http://arxiv.org/abs/2211.04787
Autor:
Naghdi, Amir H., Karimi, Kamran, Poisvert, Axel E., Esfandiarpour, Amin, Alvarez, Rene, Sobkowicz, Pawel, Alava, Mikko, Papanikolaou, Stefanos
Equiatomic NiCoCr solid solutions have been recently shown to display exceptional mechanical properties, that have been suggested to be linked to nanostructural short-range order (SRO) features that may arise from thermal treatments, such as annealin
Externí odkaz:
http://arxiv.org/abs/2210.12512