Juraj Olejňák

Juraj Olejňák
Czech Technical University in Prague | ČVUT · Faculty of Nuclear Sciences and Physical Engineering (FJFI)

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9
Publications
569
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24
Citations

Publications

Publications (9)
Article
Full-text available
High mobility of twin boundaries in modulated martensites of Ni–Mn–Ga‐based ferromagnetic shape memory alloys holds a promise for unique magnetomechanical applications. This feature has not been fully understood so far, and in particular, it has yet not been unveiled what makes the lattice mechanics of modulated Ni–Mn–Ga specifically different from...
Preprint
Full-text available
High mobility of twin boundaries in modulated martensites of Ni-Mn-Ga-based ferromagnetic shape memory alloys holds a promise for unique magnetomechanical applications. This feature has not been fully understood so far, and in particular it has yet not been unveiled what makes the lattice mechanics of modulated Ni-Mn-Ga specifically different from...
Article
No PDF available ABSTRACT Determination of the elastic constants by RUS is an inverse problem because experimentally obtained resonant frequencies cannot be directly recalculated into the elastic constants. Instead, an approximate spectrum is calculated from the dimensions and crystallographic orientation of the sample, its mass, and a set of 'gues...
Article
Full-text available
The impact of precompression, thermal treatment and its combination on the deformation behaviour of an extruded Mg-Zn-Ca (ZX10) alloy was studied with respect to a varied average grain size. The Hall-Petch plot was used to highlight the impact in a wide grain size interval. The initial texture of the wrought alloy was characterized by X-ray diffrac...
Article
Thermomechanical treatment consisting of pre-compression and a subsequent isothermal aging was used to improve the compressive properties of extruded Mg-Zn-Ca (ZX10) alloy. Isothermal aging at 150 °C and 200 °C was performed on as-extruded samples for various times to find peak aged conditions. To achieve a different twin volume fraction in the all...

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