Search Results - "Frenzel, J"

On the effect of alloy composition on martensite start temperatures and latent heats in Ni–Ti-based shape memory alloys by Frenzel, J., Wieczorek, A., Opahle, I., Maaß, B., Drautz, R., Eggeler, G.

“…In the present work we explain the concentration dependence of the martensite start temperature (MS) in Ni–Ti-based shape memory alloys (SMAs). We briefly…”
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Effect of temperature and texture on the reorientation of martensite variants in NiTi shape memory alloys by Laplanche, G., Birk, T., Schneider, S., Frenzel, J., Eggeler, G.

“…Martensitic Ni50Ti50 wires and sheets with different textures were tensile tested in the temperature range between −100 °C and 60 °C. The effect of texture and…”
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Semiconducting-to-metallic photoconductivity crossover and temperature-dependent Drude weight in graphene by Frenzel, A J, Lui, C H, Shin, Y C, Kong, J, Gedik, N

“…We investigate the transient photoconductivity of graphene at various gate-tuned carrier densities by optical-pump terahertz-probe spectroscopy. We demonstrate…”
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Influence of Ni on martensitic phase transformations in NiTi shape memory alloys by Frenzel, J., George, E.P., Dlouhy, A., Somsen, Ch, Wagner, M.F.-X., Eggeler, G.

“…High-precision data on phase transformation temperatures in NiTi, including numerical expressions for the effect of Ni on M S, M F, A S, A F and T 0, are…”
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An Optimized Stereo Digital Image Correlation Setup Based on Parfocal Zoom Lenses for Full-Field Measurements at 0.5–2× Magnification by Sarvari, E., Ahadi, A., Eggeler, G., Frenzel, J.

“…Background Stereo-digital image correlation (DIC) measurements can be challenging when working with small specimens. Achieving high-precision data requires…”
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Soliton superlattices in twisted hexagonal boron nitride by Ni, G. X., Wang, H., Jiang, B.-Y., Chen, L. X., Du, Y., Sun, Z. Y., Goldflam, M. D., Frenzel, A. J., Xie, X. M., Fogler, M. M., Basov, D. N.

“…Properties of atomic van der Waals heterostructures are profoundly influenced by interlayer coupling, which critically depends on stacking of the proximal…”
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Impurity levels and fatigue lives of pseudoelastic NiTi shape memory alloys by Rahim, M., Frenzel, J., Frotscher, M., Pfetzing-Micklich, J., Steegmüller, R., Wohlschlögel, M., Mughrabi, H., Eggeler, G.

“…In the present work we show how different oxygen (O) and carbon (C) levels affect fatigue lives of pseudoelastic NiTi shape memory alloys. We compare three…”
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Ni-base superalloy single crystal (SX) mosaicity characterized by the Rotation Vector Base Line Electron Back Scatter Diffraction (RVB-EBSD) method by Thome, P., Medghalchi, S., Frenzel, J., Schreuer, J., Eggeler, G.

“…•We present a new cross-correlation based EBSD procedure using rotation vectors.•Minimization of systematic errors using a multi dimensional base line…”
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Influence of carbon on martensitic phase transformations in NiTi shape memory alloys by Frenzel, J., Zhang, Z., Somsen, Ch, Neuking, K., Eggeler, G.

“…In the present paper we show how carbon affects martensitic transformations in Ni-rich NiTi shape memory alloys. During vacuum induction melting in graphite…”
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Effect of off-stoichiometric compositions on microstructures and phase transformation behavior in Ni-Cu-Pd-Ti-Zr-Hf high entropy shape memory alloys by Piorunek, D., Oluwabi, O., Frenzel, J., Kostka, A., Maier, H.J., Somsen, C., Eggeler, G.

“…High entropy shape memory alloys (HE-SMAs) show reversible martensitic phase transformations at elevated temperatures. HE-SMAs were derived from binary NiTi,…”
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Fracture mechanics and microstructure in NiTi shape memory alloys by Gollerthan, S., Young, M.L., Baruj, A., Frenzel, J., Schmahl, W.W., Eggeler, G.

“…Crack extension under static loading in pseudoplastic and pseudoelastic binary NiTi shape memory alloy (SMA) compact tension (CT) specimens was examined. Two…”
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High-temperature and low-stress creep anisotropy of single-crystal superalloys by Agudo Jácome, L., Nörtershäuser, P., Heyer, J.-K., Lahni, A., Frenzel, J., Dlouhy, A., Somsen, C., Eggeler, G.

“…The high-temperature and low-stress creep (1293K, 160MPa) of the single-crystal Ni-based superalloy LEK 94 is investigated, comparing the tensile creep…”
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Elementary Transformation and Deformation Processes and the Cyclic Stability of NiTi and NiTiCu Shape Memory Spring Actuators by Grossmann, Ch, Frenzel, J., Sampath, V., Depka, T., Eggeler, G.

“…The present work addresses functional fatigue of binary NiTi and ternary NiTiCu (with 5, 7.5, and 10 at. pct Cu) shape memory (SM) spring actuators. We study…”
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Phase volume fractions and strain measurements in an ultrafine-grained NiTi shape-memory alloy during tensile loading by Young, M.L., Wagner, M.F.-X., Frenzel, J., Schmahl, W.W., Eggeler, G.

“…An ultrafine-grained pseudoelastic NiTi shape-memory alloy wire with 50.9 at.% Ni was examined using synchrotron X-ray diffraction during in situ uniaxial…”
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The effect of cast microstructure and crystallography on rafting, dislocation plasticity and creep anisotropy of single crystal Ni-base superalloys by Nörtershäuser, P., Frenzel, J., Ludwig, A., Neuking, K., Eggeler, G.

“…In the present work we investigate three mechanical and microstructural aspects of high temperature and low stress creep of the single crystal superalloy LEK…”
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Site occupation of Nb atoms in ternary Ni–Ti–Nb shape memory alloys by Shi, H., Frenzel, J., Martinez, G.T., Van Rompaey, S., Bakulin, A., Kulkova, S., Van Aert, S., Schryvers, D.

“…Nb occupancy in the austenite B2-NiTi matrix and Ti2Ni phase in Ni–Ti–Nb shape memory alloys was investigated by aberration-corrected scanning transmission…”
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High quality vacuum induction melting of small quantities of NiTi shape memory alloys in graphite crucibles by Frenzel, J., Zhang, Z., Neuking, K., Eggeler, G.

“…Binary NiTi based shape memory alloys can be produced starting from the pure elements (Ni-pellets, Ti-rods) by using vacuum induction melting (VIM). VIM ingot…”
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Spin-induced optical conductivity in the spin-liquid candidate herbertsmithite by Pilon, D V, Lui, C H, Han, T-H, Shrekenhamer, D, Frenzel, A J, Padilla, W J, Lee, Y S, Gedik, N

“…We report a direct measurement of the low-frequency optical conductivity of large-area single-crystal herbertsmithite, a promising spin-liquid candidate…”
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Do Cement Nanotubes exist? by Manzano, H., Enyashin, A. N., Dolado, J. S., Ayuela, A., Frenzel, J., Seifert, G.

“…Using atomistic simulations, this work indicates that cement nanotubes can exist. The chemically compatible nanotubes are constructed from the two main…”
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A Novel Thermo-Mechanical Processing Route Exploiting Abnormal Grain Growth in Heusler-Type Co–Ni–Ga Shape Memory Alloys by Lauhoff, C., Pham, T., Paulsen, A., Krooß, P., Frenzel, J., Eggeler, G., Niendorf, T.

“…Heusler-type Co–Ni–Ga shape memory alloys attracted significant scientific attention owing to excellent superelasticity in single-crystalline state. However,…”
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