TY - GEN A1 - Jinks, Clare A1 - Botto-van Bemden, Angie A1 - Bunzli, Samantha A1 - Bowden, Jocelyn A1 - Egerton, Thorlene A1 - Eyles, Jillian A1 - Foster, Nadine A1 - Healey, Emma L. A1 - Maddison, John A1 - O’Brien, Daniel A1 - Quicke, Jonathan G. A1 - Schiphof, Dieuwke A1 - Parry, Emma A1 - Thomas, Martin J. A1 - Holden, Melanie A. A1 - Allen, Kelli A1 - Babatunde, Opeyemi O. A1 - Bennel, Kim L. A1 - Berry, Alice A1 - Bierma-Zeinstra, Sita A1 - Callahan, Leigh A1 - Campbell, Laura A1 - Dziedzic, Krysia S. A1 - Finney, Andrew A1 - French, Helen P. A1 - Haber, Travis A1 - Hadley-Barrows, Tina A1 - Hall, Michelle A1 - Hawker, Gillian A1 - Henriksen, Marius A1 - Hinman, Rana S. A1 - Ho-Pham, Lan A1 - Hunter, David J. A1 - Lawford, Belinda J. A1 - Mallen, Christian D. A1 - McHugh, Gretl A. A1 - Kopkow, Christian A1 - Neogi, Tuhina A1 - Nicholls, Elaine A1 - Nicolson, Philippa J. A. A1 - Østerås, Nina A1 - Paskins, Zoe A1 - Protheroe, Joanne A1 - Roos, Ewa M. A1 - Runhaar, Jos A1 - Skou, Soren T. A1 - Simkins, Joanna A1 - Swaithes, Laura A1 - Thomas, Geraint A1 - Esch, Martin van der A1 - Whittaker, Jackie A1 - Zhang, Weiya T1 - Changing the narrative on osteoarthritis: A call for global action T2 - Osteoarthritis and Cartilage Y1 - 2024 U6 - https://doi.org/10.1016/j.joca.2024.02.004 SN - 1063-4584 VL - 32 IS - 4 SP - 414 EP - 420 ER - TY - CHAP A1 - Zhang, Ping A1 - Wendt, Jens A1 - Zhang, J. A1 - Holländer, F. A1 - Supik, Vladimir ED - Kainer, Karl Ulrich T1 - Superplasticity in hot-rolled magnesium alloy AZ31 sheets T2 - Magnesium, proceedings of the 6th International Conference Magnesium Alloys and Their Applications, November 2003 in Wolfsburg Y1 - 2004 SN - 3-527-30975-6 PB - Wiley-VCH CY - Weinheim ER - TY - GEN A1 - Sullivan, J. T. A1 - Wilks, Regan G. A1 - Winkler, M. T. A1 - Weinhardt, Lothar A1 - Recht, D. A1 - Said, A. J. A1 - Newman, B. K. A1 - Zhang, Y. A1 - Blum, Monika A1 - Krause, S. A1 - Yang, Wan Li A1 - Heske, Clemens A1 - Aziz, M. J. A1 - Bär, Marcus A1 - Buonassisi, T. T1 - Soft x-ray emission spectroscopy studies of the electronic structure of silicon supersaturated with sulfur N2 - We apply soft x-ray emission spectroscopy (XES) to measure the electronic structure of crystalline silicon supersaturated with sulfur (up to 0.7 at. %), a candidate intermediate-band solar cell material. Si L2,3 emission features are observed above the conventional Si valence band maximum, with intensity scaling linearly with S concentration. The lineshape of the S-induced features change across the insulator-to-metal transition, indicating a significant modification of the local electronic structure concurrent with the change in macroscopic electronic behavior. The relationship between the Si L2,3 XES spectral features and the anomalously high sub-band gap infrared absorption is discussed. KW - black silicon KW - solar cells KW - electronic surface structure KW - x-ray emission spectroscopy Y1 - 2011 ER - TY - GEN A1 - Liu, W. C. A1 - Dong, J. A1 - Zhang, Ping A1 - Zhai, Chun-Quan A1 - Ding, W. J. T1 - Effect of Shot Peening on Surface Characteristics and Fatigue Properties of T5-treated ZK60 Alloy Y1 - 2009 ER - TY - GEN A1 - Liu, W. C. A1 - Dong, J. A1 - Zhang, Ping A1 - Yao, Z. Y. A1 - Zhai, Chun-Quan A1 - Ding, W. J. T1 - High cycle fatigue behaviour of as-extruded ZK60 magnesium alloy Y1 - 2009 ER - TY - GEN A1 - Malliotakis, Zisis A1 - Banyon, Colin A1 - Zhang, Kuiwen A1 - Wagnon, Scott W. A1 - Rodriguez Henriquez, Jose Juan A1 - Vourliotakis, George A1 - Keramiotis, Christos A1 - Founti, Maria A1 - Mauß, Fabian A1 - Pitz, William J. A1 - Curran, Henry J. T1 - Testing the validity of a mechanism describing the oxidation of binary n-heptane/toluene mixtures at engine operating conditions T2 - Combustion and Flame N2 - The aim of this work is to evaluate the influence of the n-heptane/toluene ratio on the reactivity of binary toluene reference fuels (TRFs), through a combined experimental and numerical work. Novel experimental ignition delay time (IDT) data of three binary TRFs of varying n-heptane/toluene ratios have been obtained in a high-pressure shock tube and in a rapid compression machine at conditions relevant to novel engine operation. Measurements have been performed at two pressures (10 and 30 bar), and at three fuel/air equivalence ratios (0.5, 1.0 and 2.0) for TRF mixtures of 50%, 75% and 90% by volume toluene concentration, over the temperature range of 650–1450 K. It was found that, increasing the n-heptane content, led to an increase in reactivity and shorter measured IDTs. Reduced sensitivity to the equivalence ratio was observed at high temperatures, especially for high toluene content mixtures. A … KW - The aim of this work is to evaluate the influence of the n-heptane/toluene Y1 - 2019 U6 - https://doi.org/10.1016/j.combustflame.2018.10.024 SN - 0010-2180 VL - 199 SP - 241 EP - 248 ER - TY - CHAP A1 - Zhang, J. A1 - Kutzsche, Anja A1 - Rosenberg, K. A1 - Viehweger, Bernd A1 - Leyens, Christoph T1 - A novel canning technology for forging of gamma-TiAl alloys N2 - A novel canning technology to forge gamma-TiAl alloys was developed at the BTU Cottbus. A TiAl specimen is encapsulated with multilayer stainless steel foil and glass. The steel foil layers prevent the heat loss through radiation and the glass layer reduces the temperature decrease through conduction. First, the effect of steel foil on the cooling rate was investigated. Cooling curves were recorded for TiAl specimens without steel foil layer, with 1, 2, 3 and 4 layers of steel foil, as well as with 3 coated steel foil layers, respectively. While the unprotected specimen cooled from 1200 °C to 1100 °C within 12 s, the specimen with 3 coated steel foil layers needed 52 s for the same temperature decrease. The efficiency of the glass layer was examined with forging of steel specimens. The cooling rate during forging of the specimen with a glass layer is only half of that without a glass layer. Based on the results, Ti-45Al-0.5Mo-0.5Cu-0.2Si specimens, canned with steel foil and glass, were successfully forged at strain rates of 0.1 s-1 and 0.04 s-1 with warm dies which were heated to 500 °C. Visual and metallographic examinations revealed no cracks, pores or micropores. The microstructures are fine-equiaxed grains. KW - canned forging KW - canning KW - TiAl Y1 - 2006 ER - TY - CHAP A1 - Kutzsche, Anja A1 - Zhang, J. A1 - Appel, Fritz A1 - Leyens, Christoph A1 - Viehweger, Bernd T1 - Forging of Beta-Phase containing gamma-TiAl alloys KW - TiAl Y1 - 2006 ER - TY - GEN A1 - Hofmann, Timo A1 - Yu, Ted H. A1 - Folse, Michael A1 - Weinhardt, Lothar A1 - Bär, Marcus A1 - Zhang, Yufeng A1 - Merinov, Boris V. A1 - Myers, Deborah J. A1 - Goddard, William A. A1 - Heske, Clemens T1 - Reply to "Comment on 'Using Photoelectron Spectroscopy and Quantum Mechanics to Determine d-Band Energies of Metals for Catalytic Applications'" T2 - Journal of Physical Chemistry : C Y1 - 2013 SN - 1932-7455 VL - 117 IS - 13 SP - 6916 EP - 6917 ER - TY - GEN A1 - Geyer, Thomas A1 - Moreau, Danielle J. A1 - Zhang, Tingyi A1 - Schneehagen, Erik W. A1 - Ding, Yuchen T1 - Experimental investigation of novel, low-noise turbine blade tip designs T2 - Fortschritte der Akustik - DAGA, 46. Jahrestagung für Akustik, 16.-19. März 2020 in Hannover Y1 - 2020 UR - https://www-docs.b-tu.de/fg-akustik/public/veroeffentlichungen/geyer_noveltip_daga2020.pdf ER - TY - GEN A1 - Ding, Yuchen A1 - Zhang, Tingyi A1 - Geyer, Thomas A1 - Silva, Charitha de A1 - Doolan, Con A1 - Moreau, Danielle J. T1 - Experimental Investigation of the Flow Characteristics and Noise Generation at the Wing–Wall Junction T2 - Journal of Aerospace Engineering Y1 - 2021 UR - https://ascelibrary.org/doi/abs/10.1061/%28ASCE%29AS.1943-5525.0001303 U6 - https://doi.org/10.1061/(ASCE)AS.1943-5525.0001303 VL - 34 IS - 5 ER - TY - GEN A1 - Zhang, Ping A1 - Ding, W. J. A1 - Lindemann, Janny A1 - Leyens, Christoph T1 - Mechanical properties of the hot-rolled Mg-12Gd-3Y magnesium alloy N2 - Tensile and high cycle fatigue (HCF) properties of the hot-rolled Mg-12Gd-3Y (wt.%) magnesium alloyhave been investigated. The magnesium alloy exhibits a fatigue strength of about 150 MPa, which ismuch higher than that of the commercial Mg-8Al-Zn alloy AZ80. Aging heat-treatment (T5) improvedthe fatigue life of the Mg-12Gd-3Y alloy. Fatigue cracks nucleated at the intense slip bands in theas-rolled alloy. After T5 treatment, however, the fatigue crack nucleation site shifted to the phase boundariesbetween MgGdY particles and Mg matrix. T5 heat-treatment retarded the crack initiation and thusimproved the fatigue life of the Mg-12Gd-3Y alloy. KW - Mechanical properties KW - Tensile KW - Fatigue KW - Magnesium alloys KW - Aging heat treatment Y1 - 2009 ER - TY - CHAP A1 - Liu, W. C. A1 - Dong, J. A1 - Zhang, Ping ED - Agnew, Sean A. T1 - Effect of Shot Peening on High Cycle Fatigue Performance of Mg-10Gd-3Y-0.5Zr Magnesium Alloy T2 - Magnesium Technology 2010, Proceedings of a symposium sponsored by the Magnesium Committee of the Light Metals Division of TMS Y1 - 2009 SN - 978-0-87339-746-9 SP - 255 EP - 260 PB - The Minerals, Metals & Materials Society CY - Pennsylvania ER - TY - GEN A1 - Hofmann, Timo A1 - Yu, Ted H. A1 - Folse, Michael A1 - Weinhardt, Lothar A1 - Bär, Marcus A1 - Zhang, Yufeng A1 - Merinov, Boris V. A1 - Myers, Deborah J. A1 - Goddard, William A. A1 - Heske, Clemens T1 - Using Photoelectron Spectroscopy and Quantum Mechanics to Determine d‑Band Energies of Metals for Catalytic Applications T2 - The Journal of Physical Chemistry : C N2 - The valence band structures (VBS) of eight transition metals (Fe, Co, Ni, Cu, Pd, Ag, Pt, Au) were investigated by photoelectron spectroscopy (PES) using He I, He II, and monochromatized Al Kα excitation. The influence of final states, photoionization cross-section, and adsorption of residual gas molecules in an ultrahigh vacuum environment are discussed in terms of their impact on the VBS. We find that VBSs recorded with monochromatized Al Kα radiation are most closely comparable to the ground state density of states (DOS) derived from quantum mechanics calculations. We use the Al Kα-excited PES measurements to correct the energy scale of the calculated ground-state DOS to approximate the “true” ground-state d-band structure. Finally, we use this data to test the d-band center model commonly used to predict the electronicproperty/ catalytic-activity relationship of metals. We find that a simple continuous dependence of activity on d-band center position is not supported by our results (both experimentally and computationally). Y1 - 2012 SN - 1932-7455 VL - 116 IS - 45 SP - 24016 EP - 24026 ER - TY - GEN A1 - Zhang, Tingyi A1 - Geyer, Thomas A1 - Silva, Charitha de A1 - Fischer, Jeoffrey A1 - Doolan, Con A1 - Moreau, Danielle J. T1 - Experimental Investigation of Tip Vortex Formation Noise Produced by Wall-Mounted Finite Airfoils T2 - Journal of Aerospace Engineering Y1 - 2021 UR - https://ascelibrary.org/doi/10.1061/%28ASCE%29AS.1943-5525.0001315 U6 - https://doi.org/10.1061/(ASCE)AS.1943-5525.0001315 SN - 1943-5525 VL - 34 IS - 6 ER - TY - GEN A1 - Zhang, Tingyi A1 - Moreau, Danielle J. A1 - Geyer, Thomas A1 - Fischer, Jeoffrey A1 - Doolan, Con T1 - Dataset on tip vortex formation noise produced by wall-mounted finite airfoils with sinusoidal and porous tip geometries T2 - Data in Brief Y1 - 2020 U6 - https://doi.org/10.1016/j.dib.2020.105471 SN - 2352-3409 VL - 30 ER - TY - GEN A1 - Zhang, Tingyi A1 - Moreau, Danielle J. A1 - Geyer, Thomas A1 - Fischer, Jeoffrey A1 - Doolan, Con T1 - Dataset on tip vortex formation noise produced by wall-mounted finite airfoils with flat and rounded tip geometries T2 - Data in Brief Y1 - 2020 U6 - https://doi.org/10.1016/j.dib.2019.105058 SN - 2352-3409 VL - 28 ER - TY - GEN A1 - Zhang, Haoyin A1 - Wang, C. P. A1 - Pyczak, Florian A1 - Ebel, Thomas A1 - Liu, X. J. T1 - A New Kind of Biomedical Ti–Mn–Nb Alloy T2 - Physica Status Solidi. A, Applications and Materials Science Y1 - 2023 U6 - https://doi.org/10.1002/pssa.202200348 SN - 1862-6300 VL - 220 IS - 7 ER - TY - GEN A1 - Geyer, Thomas A1 - Schneehagen, Erik W. A1 - Herold, Gert A1 - Zhang, Tingyi A1 - Moreau, Danielle J. T1 - Reduction of rotor aerodynamic noise using porous blade tips T2 - Fortschritte der Akustik - DAGA, 50. Jahrestagung für Akustik N2 - Motivated by promising results from experiments on the noise reduction performance of finite wall-mounted airfoils with a porous tip in an aeroacoustic wind tunnel, corresponding measurements were performed in a dedicated rotor test rig. This rig features a 3 kW direct-drive electric motor with three rotor blades of 1.1 m diameter. In the experiments, a variety of different tip modifications was tested regarding their noise reducing performance, including different porous materials that were manufactured using rapid prototyping. Acoustic measurements were performed at different rotationals speeds and blade angles using a ring-shaped microphone array consisting of 60 evenly spaced microphones. The rotational speed was measured using a laser sensor. Different beamforming algorithms were used in post-processing to help analyzing the data. The results show that porous tips can lead to a notable noise reduction at low frequencies, but a small penalty at medium and high frequencies which may be due to the surface roughness of the porous tips. This trend seems more severe for lower blade angles than for higher ones. These findings agree well with those obtained from the previous wind tunnel measurements. Y1 - 2024 UR - https://pub.dega-akustik.de/DAGA_2024/konferenz?article=471 ER -