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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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The effect of laser scanning strategy on NiTi shape memory alloys processed by laser powder bed fusion
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NiTi shape memory alloy helixes through the hydriding-dehydring method
Abstract not provided
Symmetry and pathway analyses of the twinning modes in Ni–Ti shape memory alloys
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Investigation of thermomechanical behaviors of acrylate-based shape memory polymers by molecular dynamics simulation
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Effect of a pre-aging treatment on the mechanical behaviors of Ni50.3Ti49.7−xHfx (x ≤ 9 at.%) Shape memory alloys
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Confirming the Composition of Shape Memory Alloys by Microstructural Characterization.
Abstract not provided.
Melt-Processable Shape-Memory Elastomers Containing Bisurea Segments
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Local chemical inhomogeneity enables superior strength-ductility-superelasticity synergy in additively manufactured NiTi shape memory alloys
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Lattice Vibrations Boost Demagnetization Entropy in Shape Memory Alloy
Magnetocaloric (MC) materials present an avenue for chemical-free, solid state refrigeration through cooling via adiabatic demagnetization. We have used inelastic neutron scattering to measure the lattice dynamics in the MC material Ni 45 Co 5 Mn 36.6 In 13.4 . Upon heating across TC, the material exhibits an anomalous increase in phonon entropy of 0.17 0.04 k_B/atom, which is nine times larger than expected from conventional thermal expansion. We find that the phonon softening is focused in a transverse optic phonon, and we present the results of first-principle calculations which predict a strong coupling between lattice distortions and magnetic excitations.
Stretching-Induced Thermal Conductivity Change in Shape-Memory Polymer Composites
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Magnetic shape memory alloy Ni45Co5Mn36.6In13.4 measured on ARCS at 300 K and 450 K
These sqw files were generated by combining all of the individual crystal angles scans using the HORACE software package (https://pace-neutrons.github.io/Horace/unstable/user_guide/Getting_started.html). The neutron incident energy for both temperatures was 50 meV. The file labeled 50meV_450K_All.sqw is the 450 K data and the file labeled 50meV_RT_All.sqw is for the 300 K data. The crystal was oriented such that HHL is in the scattering plane.