693.932 PEOPLE
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| Naji, M. |
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| Motta, Antonella |
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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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| Kočí, Jan | Prague |
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| Azevedo, Nuno Monteiro |
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Frenzel, Jan
Ruhr University Bochum
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (80/80 displayed)
- 2024Temperature-controlled laser processing of shape memory wires
- 2024Temperature-Controlled Laser Processing of Shape Memory Wires: Spherical Ends as Connectors for System Integrationcitations
- 2023X-radiography front tracking gradient furnace for directional solidification of bulk Al-alloys
- 2023A Unifying Perspective of Common Motifs That Occur across Disparate Classes of Materials Harboring Displacive Phase Transitionscitations
- 2022Coupled functional structural fatigue of NiTi-Based shape memory alloys
- 2022Microstructures and martensitic transformations in high entropy shape memory alloys
- 2022Formgedächtnislegierungen
- 2021Laboratory-scale processing and performance assessment of Ti–Ta high-temperature shape memory spring actuators
- 2021Plasticity induced by nanoindentation in a CrCoNi medium-entropy alloy studied by accurate electron channeling contrast imaging revealing dislocation-low angle grain boundary interactionscitations
- 2021Interactions between dislocations and low-angle grain boundary in a single CrCoNi medium-entropy alloy
- 2020Experimental and theoretical investigation on phase formation and mechanical properties in Cr-Co-Ni alloys processed using a novel thin-film quenching techniquecitations
- 2020On the importance of structural and functional fatigue in shape memory technology
- 2020Mechanisms of plastic deformation in the vicinity of a low-angle grain boundary in CrCoNi medium-entropy alloy
- 2020Orientation-dependent deformation behavior of 316L steel manufactured by laser metal deposition and casting under local scratch and indentation load
- 2019A Kinetic Study on the Evolution of Martensitic Transformation Behavior and Microstructures in Ti–Ta High-Temperature Shape-Memory Alloys During Agingcitations
- 2019High entropy shape memory alloys
- 2018Reconciling experimental and theoretical data in the structural analysis of Ti–Ta shape-memory alloyscitations
- 2018Development of Single-Crystal Ni-Base Superalloys Based on Multi-criteria Numerical Optimization and Efficient Use of Refractory Elementscitations
- 2017Grain nucleation and growth in deformed NiTi shape memory alloyscitations
- 2017Composition, constitution and phase transformation behavior in thin-film and bulk Ti-Ni-Ycitations
- 2017Microstructural evolution and functional fatigue of a Ti-25Ta high-temperature shape memory alloycitations
- 2017On the competition between the stress-induced formation of martensite and dislocation plasticity during crack propagation in pseudoelastic NiTi shape memory alloyscitations
- 2015On the effect of alloy composition on martensite start temperatures and latent heats in Ni–Ti-based shape memory alloys
- 2015Damage evolution in pseudoelastic polycrystalline Co–Ni–Ga high-temperature shape memory alloyscitations
- 2015Cyclic degradation of titanium-tantalum high-temperature shape memory alloyscitations
- 2015Thermal stabilization of NiTiCuV shape memory alloyscitations
- 2015Cyclic degradation of titanium-tantal high-temperature shape memory alloys : the role of dislocation activiry and chemical decomposition
- 2015Caloric effects in shape memory alloys
- 2015On the widths of the hysteresis of mechanically and thermally induced martensitic transformations in Ni–Ti-based shape memory alloys
- 2015Microstructure, Shape Memory Effect and Functional Stability of Ti67Ta33 Thin Filmscitations
- 2015Microstructural evolution in a Ti – Ta high-temperature shape memory alloy during creep
- 2014On the functional degradation of binary titanium-tantalum high-temperature shape memory alloyscitations
- 2014Ingot metallurgy and microstructural characterization of Ti-Ta alloys
- 2014Site occupation of Nb atoms in ternary Ni-Ti-Nb shape memory alloys
- 2014On the functional degradation of binary titanium-tantalum high-temperature shape memory alloys : a new concept for fatigue life extension
- 2014On the effects of alloy composition on martensitic transformation in NiTi-based shape memory alloys
- 2014Investigation of the Thin-Film Phase Diagram of the Cr-Ni-Re System by High-Throughput Experimentationcitations
- 2014Caloric effects in shape memory alloys
- 2014Investigation of ternary subsystems of superalloys by thin-film combinatorial synthesis and high-throughput analysiscitations
- 2013High-temperature and low-stress creep anisotropy of single-crystal superalloys
- 2013Bending rotation HCF testing of pseudoelastic Ni-Ti shape memory alloys
- 2013Impurity levels and fatigue lives of pseudoelastic NiTi shape memory alloys
- 2013The biocompatibility of dense and porous Nickel–Titanium produced by selective laser melting
- 2013On the properties of Ni-Rich Nitti shape memory parts produced by selective laser melting
- 2013On the properties of Ni-rich NiTi shape memory alloys produced by selective laser melting
- 2013Strain mapping of crack extension in pseudoelastic NiTi shape memory alloys during static loading
- 2012The effectiveness of coincidence site lattice criteria in predicting creep cavitation resistance
- 2012Structural and functional properties of NiTi shape memory alloys produced by Selective Laser Melting
- 2011On the evolution of microstructure in oxygen-free high conductivity copper during thermomechanical processing using rotary swaging
- 2011Phase transformations and functional properties of NiTi alloy with ultrafine-grained structure
- 2010Phase volume fractions and strain measurements in an ultrafine-grained NiTi shape-memory alloy during tensile loading
- 2010Suppression of Ni4Ti3 precipitation by grain size refinement in Ni-Rich NiTi shape memory alloys
- 2010Influence of Ni on martensitic phase transformations in NiTi shape memory alloys
- 2010Effect of low-temperature precipitation on the transformation characteristics of Ni-rich NiTi shape memory alloys during thermal cycling
- 2010Identification of quaternary shape memory alloys with near-zero thermal hysteresis and unprecedented functional stabilitycitations
- 2010Nanoindentation of a pseudoelastic NiTiFe shape memory alloy
- 2009Nanoindentation of Ti50Ni48Fe2 and Ti50Ni40Cu10 shape memory alloys : dedicated to Professor Dr. Günter Gottstein on the occasion of his 65th birthday
- 2009Fracture mechanics and microstructure in NiTi shape memory alloyscitations
- 2009Nanoindentation of Ti50Ni48Fe2 and Ti50Ni40Cu10 shape memory alloyscitations
- 2009Thermomechanical constraints on pseudoelasticity during nanoindentation of binary and ternary NiTi(Fe) alloys
- 2009On the influence of crystal defects on the functional stability of NiTi based shape memory alloys
- 2008Effect of martensitic transformation on the performance of coated NiTi surfaces
- 2008Powder metallurgical processing of NiTi shape memory alloys with elevated transformation temperatures
- 2008Processing and property assessment of NiTi and NiTiCu shape memory actuator springs
- 2008Hard X-ray studies of stress-induced phase transformations of superelastic NiTi shape memory alloys under uniaxial load
- 2008On the influence of thermomechanical treatments on the microstructure and phase transformation behavior of Ni–Ti–Fe shape memory alloys
- 2008Martensitic transformations and functional stability in ultra-fine grained NiTi shape memory alloys
- 2007Influence of carbon on martensitic phase transformations in NiTi shape memory alloys
- 2006Vacuum induction melting of ternary NiTiX (X = Cu, Fe, Hf, Zr) shape memory alloys using graphite crucibles
- 2006NiTi shape memory alloy metallurgy
- 2006Orientation relationship between TiC carbides and B2 phase in as-cast and heat-treated NiTi shape memory alloys
- 2006Coated shape memory alloys under strain
- 2006SEM micrographs from NiTi-based shape memory alloys after mechanical polishing and electropolishing
- 2005On the reaction between NiTi melts and crucible graphite during vacuum induction melting of NiTi shape memory alloys
- 2005On the formation of TiC crystals during processing of NiTi shape memory alloys
- 2004Induction melting of NiTi shape memory alloys the influence of the commercial crucible graphite on alloy quality
- 2004High quality vacuum induction melting of small quantities of NiTi shape memory alloys in graphite crucibles
- 2004Induction melting of NiTi shape memory alloys
- 2004Electrolytic processing of NiTi shape memory alloys
- 2004Induction melting of NiTi shape memory alloys citations
Places of action
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article
Identification of quaternary shape memory alloys with near-zero thermal hysteresis and unprecedented functional stability
Abstract
<p>Improving the functional stability of shape memory alloys (SMAs), which undergo a reversible martensitic transformation, is critical for their applications and remains a central research theme driving advances in shape memory technology. By using a thin-film composition-spread technique and high-throughput characterization methods, the lattice parameters of quaternary Ti-Ni-Cu-Pd SMAs and the thermal hysteresis are tailored. Novel alloys with near-zero thermal hysteresis, as predicted by the geometric nonlinear theory of martensite, are identified. The thin-film results are successfully transferred to bulk materials and near-zero thermal hysteresis is observed for the phase transformation in bulk alloys using the temperaturedependent alternating current potential drop method. A universal behavior of hysteresis versus the middle eigenvalue of the transformation stretch matrix is observed for different alloy systems. Furthermore, significantly improved functional stability, investigated by thermal cycling using differential scanning calorimetry, is found for the quaternary bulk alloy Ti<sub>50.2</sub>Ni<sub>34.4</sub>Cu12.3Pd<sub>3.1</sub></p>