The Experts below are selected from a list of 1908 Experts worldwide ranked by ideXlab platform
Lei Shen - One of the best experts on this subject based on the ideXlab platform.
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hall Petch Effect and strain gradient Effect in the torsion of thin gold wires
Scripta Materialia, 2014Co-Authors: Zhipeng Gan, Dabiao Liu, Bo Zhang, Lei ShenAbstract:Gold wires with diameters of 20 and 50 μm were annealed in the temperature range 330–750 °C to obtain different grain sizes. Torsion and tension experiments on these wires confirm that the Hall–Petch Effect is stronger than the strain gradient Effect in the small grain size region (below 5 μm). With the grain size becomes larger, the strain gradient Effect is evident. We find that these two mechanisms are synergistic, and this interaction strongly depends upon the grain size.
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Hall–Petch Effect and strain gradient Effect in the torsion of thin gold wires
Scripta Materialia, 2014Co-Authors: Zhipeng Gan, Dabiao Liu, Bo Zhang, Lei ShenAbstract:Gold wires with diameters of 20 and 50 μm were annealed in the temperature range 330–750 °C to obtain different grain sizes. Torsion and tension experiments on these wires confirm that the Hall–Petch Effect is stronger than the strain gradient Effect in the small grain size region (below 5 μm). With the grain size becomes larger, the strain gradient Effect is evident. We find that these two mechanisms are synergistic, and this interaction strongly depends upon the grain size.
Herbert Gleiter - One of the best experts on this subject based on the ideXlab platform.
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inverse hall Petch Effect in quasi and nanocrystalline materials
Materials Letters, 2014Co-Authors: K. A. Padmanabhan, Sriharsha Sripathi, Horst Hahn, Herbert GleiterAbstract:Abstract Inverse Hall–Petch Effect/grain size softening in quasi- and nanocrystalline materials at ambient/low temperatures is attributed to mesoscopic (~a grain diameter or more) grain/interphase boundary sliding controlled flow. Equations for estimating the free energy of activation for the rate controlling process, the free volume fraction present in a basic sliding unit and the average number of grain boundaries that align to form a planar interface during superplastic deformation are given in some of our earlier papers. These predictions are verified here using experimental data pertaining to one quasi- and two nanocrystalline systems. The agreement between the predictions and the experimental observations is satisfactory.
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Inverse Hall–Petch Effect in quasi- and nanocrystalline materials
Materials Letters, 2014Co-Authors: K. A. Padmanabhan, Sriharsha Sripathi, Horst Hahn, Herbert GleiterAbstract:Abstract Inverse Hall–Petch Effect/grain size softening in quasi- and nanocrystalline materials at ambient/low temperatures is attributed to mesoscopic (~a grain diameter or more) grain/interphase boundary sliding controlled flow. Equations for estimating the free energy of activation for the rate controlling process, the free volume fraction present in a basic sliding unit and the average number of grain boundaries that align to form a planar interface during superplastic deformation are given in some of our earlier papers. These predictions are verified here using experimental data pertaining to one quasi- and two nanocrystalline systems. The agreement between the predictions and the experimental observations is satisfactory.
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inverse hall Petch Effect and grain boundary sliding controlled flow in nanocrystalline materials
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2007Co-Authors: K. A. Padmanabhan, Horst Hahn, G.p. Dinda, Herbert GleiterAbstract:A simplified procedure for an order of magnitude experimental validation of a recently proposed model for the strain-rate dependent deformation of nanostructured materials is given. The grain size dependence of hardness predicted by the model in the range where the inverse Hall–Petch Effect is observed is validated using reliable experimental results. The significance of some related observations is also discussed.
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Inverse Hall–Petch Effect and grain boundary sliding controlled flow in nanocrystalline materials
Materials Science and Engineering: A, 2007Co-Authors: K. A. Padmanabhan, Horst Hahn, G.p. Dinda, Herbert GleiterAbstract:A simplified procedure for an order of magnitude experimental validation of a recently proposed model for the strain-rate dependent deformation of nanostructured materials is given. The grain size dependence of hardness predicted by the model in the range where the inverse Hall–Petch Effect is observed is validated using reliable experimental results. The significance of some related observations is also discussed.
Zhipeng Gan - One of the best experts on this subject based on the ideXlab platform.
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hall Petch Effect and strain gradient Effect in the torsion of thin gold wires
Scripta Materialia, 2014Co-Authors: Zhipeng Gan, Dabiao Liu, Bo Zhang, Lei ShenAbstract:Gold wires with diameters of 20 and 50 μm were annealed in the temperature range 330–750 °C to obtain different grain sizes. Torsion and tension experiments on these wires confirm that the Hall–Petch Effect is stronger than the strain gradient Effect in the small grain size region (below 5 μm). With the grain size becomes larger, the strain gradient Effect is evident. We find that these two mechanisms are synergistic, and this interaction strongly depends upon the grain size.
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Hall–Petch Effect and strain gradient Effect in the torsion of thin gold wires
Scripta Materialia, 2014Co-Authors: Zhipeng Gan, Dabiao Liu, Bo Zhang, Lei ShenAbstract:Gold wires with diameters of 20 and 50 μm were annealed in the temperature range 330–750 °C to obtain different grain sizes. Torsion and tension experiments on these wires confirm that the Hall–Petch Effect is stronger than the strain gradient Effect in the small grain size region (below 5 μm). With the grain size becomes larger, the strain gradient Effect is evident. We find that these two mechanisms are synergistic, and this interaction strongly depends upon the grain size.
K. A. Padmanabhan - One of the best experts on this subject based on the ideXlab platform.
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inverse hall Petch Effect in quasi and nanocrystalline materials
Materials Letters, 2014Co-Authors: K. A. Padmanabhan, Sriharsha Sripathi, Horst Hahn, Herbert GleiterAbstract:Abstract Inverse Hall–Petch Effect/grain size softening in quasi- and nanocrystalline materials at ambient/low temperatures is attributed to mesoscopic (~a grain diameter or more) grain/interphase boundary sliding controlled flow. Equations for estimating the free energy of activation for the rate controlling process, the free volume fraction present in a basic sliding unit and the average number of grain boundaries that align to form a planar interface during superplastic deformation are given in some of our earlier papers. These predictions are verified here using experimental data pertaining to one quasi- and two nanocrystalline systems. The agreement between the predictions and the experimental observations is satisfactory.
-
Inverse Hall–Petch Effect in quasi- and nanocrystalline materials
Materials Letters, 2014Co-Authors: K. A. Padmanabhan, Sriharsha Sripathi, Horst Hahn, Herbert GleiterAbstract:Abstract Inverse Hall–Petch Effect/grain size softening in quasi- and nanocrystalline materials at ambient/low temperatures is attributed to mesoscopic (~a grain diameter or more) grain/interphase boundary sliding controlled flow. Equations for estimating the free energy of activation for the rate controlling process, the free volume fraction present in a basic sliding unit and the average number of grain boundaries that align to form a planar interface during superplastic deformation are given in some of our earlier papers. These predictions are verified here using experimental data pertaining to one quasi- and two nanocrystalline systems. The agreement between the predictions and the experimental observations is satisfactory.
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inverse hall Petch Effect and grain boundary sliding controlled flow in nanocrystalline materials
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2007Co-Authors: K. A. Padmanabhan, Horst Hahn, G.p. Dinda, Herbert GleiterAbstract:A simplified procedure for an order of magnitude experimental validation of a recently proposed model for the strain-rate dependent deformation of nanostructured materials is given. The grain size dependence of hardness predicted by the model in the range where the inverse Hall–Petch Effect is observed is validated using reliable experimental results. The significance of some related observations is also discussed.
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Inverse Hall–Petch Effect and grain boundary sliding controlled flow in nanocrystalline materials
Materials Science and Engineering: A, 2007Co-Authors: K. A. Padmanabhan, Horst Hahn, G.p. Dinda, Herbert GleiterAbstract:A simplified procedure for an order of magnitude experimental validation of a recently proposed model for the strain-rate dependent deformation of nanostructured materials is given. The grain size dependence of hardness predicted by the model in the range where the inverse Hall–Petch Effect is observed is validated using reliable experimental results. The significance of some related observations is also discussed.
Bo Zhang - One of the best experts on this subject based on the ideXlab platform.
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hall Petch Effect and strain gradient Effect in the torsion of thin gold wires
Scripta Materialia, 2014Co-Authors: Zhipeng Gan, Dabiao Liu, Bo Zhang, Lei ShenAbstract:Gold wires with diameters of 20 and 50 μm were annealed in the temperature range 330–750 °C to obtain different grain sizes. Torsion and tension experiments on these wires confirm that the Hall–Petch Effect is stronger than the strain gradient Effect in the small grain size region (below 5 μm). With the grain size becomes larger, the strain gradient Effect is evident. We find that these two mechanisms are synergistic, and this interaction strongly depends upon the grain size.
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Hall–Petch Effect and strain gradient Effect in the torsion of thin gold wires
Scripta Materialia, 2014Co-Authors: Zhipeng Gan, Dabiao Liu, Bo Zhang, Lei ShenAbstract:Gold wires with diameters of 20 and 50 μm were annealed in the temperature range 330–750 °C to obtain different grain sizes. Torsion and tension experiments on these wires confirm that the Hall–Petch Effect is stronger than the strain gradient Effect in the small grain size region (below 5 μm). With the grain size becomes larger, the strain gradient Effect is evident. We find that these two mechanisms are synergistic, and this interaction strongly depends upon the grain size.