Search Results - "Niu, Rongmei"

Microstructure and properties of nanostructured Cu28 wt%Ag microcomposite deformed after solidifying under a high magnetic field by Zuo, Xiaowei, Han, Ke, Zhao, Congcong, Niu, Rongmei, Wang, Engang

Get full text

Ultra-high local plasticity in high-strength nanocomposites by Niu, Rongmei, Han, Ke, Xiang, Zhaolong, Qiao, Li, Siegrist, Theo M.

“…We subjected an aged Cu-24wt%Ag ingot to cold drawing to create a high-strength nanostructured composite wire with both Cu-rich proeutectic and Ag-rich…”
Get full text

Ultra-high local plasticity in high-strength nanocomposites by Niu, Rongmei, Han, Ke, Xiang, Zhaolong, Qiao, Li, Siegrist, Theo M.

“…We subjected an aged Cu-24wt%Ag ingot to cold drawing to create a high-strength nanostructured composite wire with both Cu-rich proeutectic and Ag-rich…”
Get full text

Ultrafine microstructure and hardness in Fe-Cr-Co alloy induced by spinodal decomposition under magnetic field by Xiang, Zhaolong, Zhang, Lin, Xin, Yan, An, Bailing, Niu, Rongmei, Mardani, Masoud, Siegrist, Theo, Lu, Jun, Goddard, Robert E., Man, Tiannan, Wang, Engang, Han, Ke

“…Application of an external magnetic field during heat treatment affects the hardness of magnetic Fe-Cr-Co alloys. The microstructure and composition at atomic…”
Get full text

Alumina Particle Reinforced Cu Matrix Conductors by Ke Han, Goddard, Robert E., Toplosky, Vince, Rongmei Niu, Jun Lu, Walsh, Robert

“…The high strength conductors used in pulsed magnets in the US National High Magnetic Field Laboratory (MagLab) are manufactured from Cu matrix composites. One…”
Get full text

Nucleation and growth of discontinuous precipitates in Cu–Ag alloys by An, Bailing, Xin, Yan, Niu, Rongmei, Xiang, Zhaolong, Wang, Engang, Han, Ke

“…Abstract To study discontinuous precipitation, which is an important method for strengthening materials, we observed the nucleation and growth of discontinuous…”
Get full text

Magnetic properties of doped Mn-Ga alloys made by mechanical milling and heat treatment by Brown, Daniel R., Han, Ke, Siegrist, Theo, Besara, Tiglet, Niu, Rongmei

“…Mn-Ga alloys have shown hard magnetic properties, even though these alloys contain no rare-earth metals. However, much work is needed before rare-earth magnets…”
Get full text

Aging Effect of Zylon by Rongmei Niu, Ke Han, Walsh, Robert P., Buchholz, Kyle, Goddard, Robert E., Besara, Tiglet, Siegrist, Theo M.

“…Zylon fibers, which are made of high-strength polymer, are used at the National High Magnetic Field Laboratory for structural reinforcement of high field…”
Get full text

Atomic-scale studies on the effect of boundary coherency on stability in twinned Cu by Niu, Rongmei, Han, Ke, Su, Yi-Feng, Salters, Vincent J.

“…The stored energy and hardness of nanotwinned (NT) Cu are related to interaction between dislocations and {111}-twin boundaries (TBs) studied at atomic scales…”
Get full text

Pockets of strain-softening and strain-hardening in high-strength Cu-24wt%Ag sheets by Niu, Rongmei, Han, Ke

“…To study plastic deformation behavior in high-strength Cu–Ag nanostructured composites, we compared (1) overall stress–strain curves with local stress–strain…”
Get full text

Effect of Notch Geometry on the Plastic Behavior of Cu-Ag Composites by Niu, Rongmei, Han, Ke

“…Understanding failure in conductive composites is critical for the design of reliable electrical components. Using strain mapping, we studied the effect of…”
Get full text

Impacts of Heat Treatment on Properties and Microstructure of Cu16at%Ag Conductors by Ke Han, Toplosky, V. J., Goddard, R., Jun Lu, Rongmei Niu, Jingping Chen

“…CuAg in situ composite conductors are used as conductors for Florida Bitter magnets and potential candidates for pulsed magnets in the National High Magnetic…”
Get full text

Strain hardening and softening in nanotwinned Cu by Niu, Rongmei, Han, Ke

“…Nanotwinned Cu foils with about 99% coherent twin boundaries (TBs) among all the boundaries were made. These coherent TBs, with an average spacing of 25nm,…”
Get full text

Simultaneously increasing strength and electrical conductivity in nanostructured Cu–Ag composite by Zhao, Congcong, Zuo, Xiaowei, Wang, Engang, Niu, Rongmei, Han, Ke

“…This study demonstrates how to increase the hardness, the mechanical strength, the ductility and the electrical conductivity of Cu–8wt%Ag alloy by engineering…”
Get full text

Improvement of properties in Cu–Ag composites by doping induced microstructural refinement by Zhao, Congcong, Niu, Rongmei, Xin, Yan, Brown, Daniel, McGuire, David, Wang, Engang, Han, Ke

“…The microstructure, precipitation kinetics, electrical conductivity, and mechanical properties of Cu-7.9 wt%Ag and Cu-5.8 wt%Ag doped with 0.6 wt%Nb were…”
Get full text

Cryogenic Temperature Properties and Secondary Phase Characterization of CuCrZr Composites by Niu, Rongmei, Toplosky, Vince, Han, Ke

“…We achieved both high electrical conductivity and high mechanical strength in CuCrZr wires, which are comparable to those of Al60 at both 295 K and 77 K. The…”
Get full text

Deformation induced precipitation in CuCrZr composites by Niu, Rongmei, Toplosky, Vince J., Levitan, Jeremy W., Lu, Jun, Han, Ke

“…In this study, we enhanced both hardness and electrical conductivity in solution-treated Cu-0.66Cr-0.05Zr (at%) wires. After cold deformation, hardness…”
Get full text

Stacking fault formation and Ag precipitation in Cu-Ag-Sc alloys by An, Bailing, Xin, Yan, Niu, Rongmei, Xiang, Zhaolong, Su, Yifeng, Lu, Jun, Wang, Engang, Han, Ke

“…We studied nucleation and growth of Ag precipitates in a Cu-6 wt%Ag-0.15 wt%Sc alloy and found that the early nucleation of Ag precipitates was similar to…”
Get full text

Hardening Cu-Ag composite by doping with Sc by An, Bailing, Xin, Yan, Niu, Rongmei, Lu, Jun, Wang, Engang, Han, Ke

“…[Display omitted] •The microstructure and properties of Cu-3 wt%Ag was tuned by doping with Sc.•Cu-3 wt%Ag-0.3 wt%Sc contained exclusively continuous Ag…”
Get full text

Cross-section metal sample preparations for transmission electron microscopy by electro-deposition and electropolishing by Niu, Rongmei, Han, Ke

“…A cross‐section sample preparation technique is described for transmission electron microscopy studies of metallic materials. The technique uses jet…”
Get full text