Results 111 to 120 of about 79,749 (313)

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

A study on grain boundary barrier layer solid aluminum capacitors

Open Ceramics
This study employs solid-state and chemical plating methods to fabricate aluminum grain boundary capacitors using Al@CuO composite materials. The materials were prepared under varying compaction pressures (200 psi, 500 psi, and 700 psi) and thermal ...
Wen Hsi Lee, C.R. Kuo, Hong En Chen
doaj   +1 more source

Control and characterization of individual grains and grain boundaries in graphene grown by chemical vapour deposition

, 2011
The strong interest in graphene has motivated the scalable production of high-quality graphene and graphene devices. As the large-scale graphene films synthesized so far are typically polycrystalline, it is important to characterize and control grain ...
Pei, Shin-Shem, Yong P. Chen, Peng, Peng, Deepak Pandey, Zhihua Su, Jifa Tian, Chung, Ting Fung, Liu, Zhihong, Jiming Bao, Luis A. Jauregui, Pandey, Deepak, Nathan P. Guisinger, Cao, Helin, Chen, Yong P., Qingkai Yu, Guisinger, Nathan P., Helin Cao, Dongguang Wei, Wu, Wei, Bao, Jiming, Yu, Qingkai, Ting Fung Chung, Peng Peng, Wei, Dongguang, Tian, Jifa, Wei Wu, Eric A. Stach, Colby, Robert, Shin-Shem Pei, Jauregui, Luis A., Robert Colby, Su, Zhihua, Stach, Eric A., Zhihong Liu   +33 more
core   +1 more source

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

Grain-Boundary Energy and Grain-Boundary Groove Angles in Ice

, 1972
Relative grain-boundary energies in ice were measured as a function of mismatch angles made by the c-axes or a-axes in grains, using ice specimens having triple grain boundaries.
Shigenao Suzuki, Daisuke Kuroiwa
core   +2 more sources

Forming incoherent twin boundaries: a new way for nanograin growth under cyclic loading

Materials Research Letters, 2017
Obvious grain growth was observed in regions around the fatigue cracks in the Au thin films under cyclic loading. Dominant generation of twin boundaries (TBs) and low-angle grain boundaries was observed in the coarsened grains.
Xue-Mei Luo, Xi Li, Guang-Ping Zhang
doaj   +1 more source

PSEUDO-MOLECULAR DYNAMICS STUDY 0F GRAIN BOUNDARY SEGREGATION

, 1992
The segregation of bismuth atoms on the [101] tilt copper grain boundaries Σ3 (111) 70.53°,Σ33 (545) 58.99°, Σ11(323) 50.48° and Σ9 (212) 38.94° has been studied by pseudo-molecular dynamicsusing the empirical N-body potentials.
彭八一, 周富信, 吴希俊, 汤奇恒   +3 more
core  

Affecting the Properties of Copper–Graphene Electroconductive Composite by Severe Plastic Deformation

Advanced Engineering Materials, EarlyView.
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich, Lenka Kunčická, Pavel Czernek, Zifan Wang   +3 more
wiley   +1 more source

Understanding the Stochastic Nature of Process Parameter Development of Blown Powder Laser Beam Directed Energy Deposition Additive Manufacturing of Pure Molybdenum

Advanced Engineering Materials, EarlyView.
Identified through the use of statistical design of experiments and metallographic investigation, this study exposes the stochastic origins of intergranular cracks in blown powder laser beam directed energy deposition additive manufacturing of pure molybdenum. It further demonstrates a successful crack mitigation approach with direct correlation to the
Nathaniel J. Lies, Daniel E. Driemeyer, Aaron P. Stebner   +2 more
wiley   +1 more source