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Petr Lukáš

Researcher at Academy of Sciences of the Czech Republic

Publications -  201
Citations -  4451

Petr Lukáš is an academic researcher from Academy of Sciences of the Czech Republic. The author has contributed to research in topics: Neutron diffraction & Diffraction. The author has an hindex of 32, co-authored 201 publications receiving 4173 citations. Previous affiliations of Petr Lukáš include Czechoslovak Academy of Sciences.

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Influence of strength and stress history on growth and stabilisation of fatigue cracks

TL;DR: In this article, the authors measured the fatigue crack propagation rate on sheet steel specimens and determined the conditions for a crack not to propagate and found an equation for the crack rate involving the threshold value of the stress intensity factor.
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Cyclic stress-strain response and fatigue life of metals in low amplitude region

TL;DR: In this article, a cyclic stress-strain curve, fatigue life curves, shape and area of hysteresis loops, and dislocation substructures were investigated on polycrystalline copper and copper-31% zinc specimens cycled with constant plastic strain amplitudes in low amplitude, high cycke region (N > 105 cycles to fracture).
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Effect of stress cycle asymmetry on fatigue crack growth

TL;DR: In this article, the effect of stress cycle asymmetry on fatigue crack rate and on the conditions for a crack not to propagate was studied on sheet steel specimens with a sharp central notch.
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Dislocations and Persistent Slip Bands in Copper Single Crystals Fatigued at Low Stress Amplitude

TL;DR: In this article, transmission electron microscopy of surface thin foils, both parallel and non-parallel to the surface, was used to study persistent slip bands in fatigued copper single crystals.
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R-phase transformation phenomena in thermomechanically loaded NiTi polycrystals

TL;DR: In situ neutron diffraction and ultrasonic experimental techniques have been used to investigate the B2M R transformation and R-phase reorientation processes occurring during thermal, mechanical and thermomechanical loading of NiTi shape memory alloy polycrystals as discussed by the authors.