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Fabricación y caracterización a escala micro y nano métrica de la SMA de Cu-Al-Ni para su aplicación en MicroElectroMechanical Systems (MEMS)
(2017-03-31)
Las aleaciones con memoria de forma SMAs (Shape Memory Alloys) presentan un gran potencial para el desarrollo de nuevos MEMS (MicroElectroMechanical Systems) que puedan cubrir la creciente demanda, de sensores y actuadores ...
Ti-Al intermetallics for aerospace applications: atomic relaxation processes,microstructure and mechanical properties at high temperature.
(2018-05-04)
El presente trabajo de investigación se encuadra en la línea de "Materiales Intermetálicos para Altas Temperaturas" que se desarrolla en el Grupo de investigación en MetalurgiaFísica (GIMF) de los Dptos de Física de la ...
The Influence of Thermal History on the Multistage Transformation of NiTi Shape-Memory Alloys
(MDPI, 2018-04)
The multistage martensitic phase transformation of a polycrystalline NiTi shape-memory alloy (50.3 at. %Ni-49.7 at. % Ti) has been studied by means of calorimetric measurements. After a conventional thermal treatment ...
Strain Relaxation in Cu-Al-Ni Shape Memory Alloys Studied by in Situ Neutron Diffraction Experiments
(American Institute of Physics, 2019-02-28)
In situ neutron diffraction is used to study the strain relaxation on a single crystal and other powdered Cu-Al-Ni shape memory alloys (SMAs) around martensitic transformation temperatures. This work is focused on the ...
Ultrahigh Superelastic Damping at the Nano-Scale: a Robust Phenomenon to Improve Smart MEMS Devices
(Elsevier, 2019-03)
Micro and nano pillars of Copper-based shape memory alloys (SMAs) with feature sizes between about 2 mu m and 250 nm are known to exhibit ultra-high mechanical damping due to the nucleation and motion of stress-induced ...
Studying the influence of substitutional elements on mechanical behavior of Alloy 718
(EDP Sciences, 2014)
In nickel-based superalloys, substitutional solute species have a strong impact on in service mechanical properties as well as on oxidation and corrosion resistances. In alloy 718, recent studies carried out by tensile ...
Ni–Ti-Hf High-Temperature Shape Memory Alloy: Measure of the Clausius-Clapeyron Coefficient Through Mechanical Spectroscopy
(Elsevier, 2021-03-05)
The martensitic transformation of Ni49.5Ti35.5Hf15 high temperature shape memory alloy is characterized by internal friction measurements. The temperatures for the reversible B2 <-> B19' transformation appear in the range ...
Exact-exchange Kohn-Sham potential, surface energy, and work function of jellium slabs
(American Physical Society, 2008-08)
Exact-exchange self-consistent calculations of the Kohn-Sham potential, surface energy, and work function of jellium slabs are reported in the framework of the optimized effective potential (OEP) scheme of density functional ...
Role of occupied d states in the relaxation of hot electrons in Au
(American Physical Society, 2000-07-15)
We present first-principles calculations of electron-electron scattering rates of low-energy electrons in Au. Our full band-structure calculations indicate that a major contribution from occupied d states participating in ...
Energy loss of charged particles moving parallel to a magnesium surface
(American Physical Society, 2008-10)
We present it ab initio calculations of the electronic energy loss of charged particles moving outside a magnesium surface, from a realistic description of the one-electron band structure and a full treatment of the dynamical ...