plastic deformation of cu single crystals containing anplastic deformation of cu single crystals containing an
Computational Materials Science
ture than the single crystal structure 19 . Based on MD simula-tions results of scratching polycrystalline Cu for investigating plastic deformation mechanism both dislocations and GB play a significant role in affecting plastic deformation 20 . Stress-induced crystallization of amorphous was observed in nano-
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Interface-driven microstructure development and ultra high
Interface-driven microstructure development and ultra high strength of bulk nanostructured Cu-Nb multilayers fabricated by severe plastic deformationVolume 28 Issue 13Irene J. Beyerlein Nathan A. Mara John S. Carpenter Thomas Nizolek William M. Mook Thomas A. Wynn Rodney J. McCabe Jason R. Mayeur Keonwook Kang Shijian Zheng Jian Wang Tresa M. Pollock
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Shuozhi Xu Research
Shuozhi Xu Jacob K. Startt Thomas G. Payne Chaitanya S. Deo David L. McDowell Size-dependent plastic deformation of twinned nanopillars in body-centered cubic tungsten J. Appl. Phys. 121 (2017) 175101 Shuozhi Xu Yanqing Su Dengke Chen Longlei Li Plastic deformation of Cu single crystals containing an elliptic cylindrical void Mater.
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The low temperature lattice thermal conductivity of J W
The thermal conductivities of polycrystalline copper alloys containing 2 and 12 at. aluminium 10 at. . gold and 30 at. Zn have been measured between 1.5 and 4 2 K in the annealed state and after tensile deformation. A single crystal of Cu-12 at. AI has also been studied after various stages of deformation. It has been found
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Dislocation generation at SiO 2 particles in an α-brass
Single crystals of Cu-20 wt Zn oriented for single slip and containing spherical silica particles have been deformed in tension at room temperature. The dislocation structures at the particles are a function of both strain and particle size and in some instances are found to undergo a recovery process near ambient temperatures. At the smallest particles primary prismatic loops alone are
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Chemical Engineering 378Ira A. Fulton College of
• permanent (plastic) deformation results from dislocation motion. Dislocations Schematic of a single crystal metal • unstressed (undeformed) • after tensile elongation (after plastic deformation) Steps correspond to. plastic deformation each step is produced by dislocations that have moved to the crystal surface. Linear Defects
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Computational Materials Science
ture than the single crystal structure 19 . Based on MD simula-tions results of scratching polycrystalline Cu for investigating plastic deformation mechanism both dislocations and GB play a significant role in affecting plastic deformation 20 . Stress-induced crystallization of amorphous was observed in nano-
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Avalanches and plastic flow in crystal plasticity an
Dec 04 2017 · The acoustic emission amplitude distribution was found to follow a power law with exponent about 2.0 in hexagonal cadmium and zinc single crystals (power law exponent is about 1.5 for E A) as well as FCC single crystal Cu even when multi-slip and forest hardening occur. Recently an acoustic emission transducer was mounted on the compressed
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texture rotation anisotropy multiscale model crystal
Here we present crystal plasticity finite element simulations of plane strain compression of a-Brass single crystals with different initial orientations. The aim is to study the fundamentals of mesoscale structure and texture development in face-centered-cubic (fcc) metals with low stacking fault energy (SFE). Shear banding depends on the initial orientation of the crystals.
Get PriceShuozhi Xu Research
Shuozhi Xu Jacob K. Startt Thomas G. Payne Chaitanya S. Deo David L. McDowell Size-dependent plastic deformation of twinned nanopillars in body-centered cubic tungsten J. Appl. Phys. 121 (2017) 175101 Shuozhi Xu Yanqing Su Dengke Chen Longlei Li Plastic deformation of Cu single crystals containing an elliptic cylindrical void Mater.
Get PriceComputational Materials Science
color. Fig. 1(a) shows a bicrystal Cu sample containing two R5 (310) boundaries. Samples containing R11 (113) twist (100) 36.86 twist (100) 10.39 and twist (111) 30 boundaries were also studied since connecting with different crystal planes of the abutting grains is
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Temperature dependence of elastic and plastic deformation
Single-phase solid-solution refractory high-entropy alloys (HEAs) show remarkable mechanical properties such as their high yield strength and substantial softening resistance at elevated temperatures. Hence the in-depth study of the deformation behavior for body-centered cubic (BCC) refractory HEAs is a critical issue to explore the uncovered/unique deformation mechanisms.
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X-ray microbeam measurements of individual dislocation
Jul 16 2006 · Ungár T. Mughrabi H. Wilkens M. Hilscher A. Long-range internal stresses and asymmetric X-ray line-broadening in tensile-deformed 001 -oriented copper single crystals
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A Constitutive Model for the Mechanical Behavior of Single
the deformation of single crystal Si initially containing a low density dislocations in the multi-slip <100> and <111> orientations at homologous temperatures of 0.5 to 0.8 based on the deformation mechanisms described above. (a) (b) Figure 2. (a) Infrared microphoto of deformed Si. Dislocations and trails decorated with Cu. W. C. Dash J.
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Microstructural Features of Cu-Zn Single Crystals Deformed
Copper alloys are characterized by high plasticity and good resistance to corrosion. They are applied in electrical industry telecommunication in transport and machine building particularly in the production of elements for deep drawing. The scope of investigation enclosed production of testing single crystals determination of their crystallographic orientation deformation of selected
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On the elastic–plastic decomposition of crystal
Mar 02 2012 · To verify the method we have simulated the shear deformation of a Cu single crystal at T = 300 K. As shown in figure 6 the initial configuration is a perfect fcc crystal in a periodic simulation box with the (1 1 2) and crystal directions aligned with the Cartesian axes x y and z respectively.
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Shape change of liquid particles embedded in a solid
Cu single crystals containing the B 2 O 3 particles are tensile tested at high temperatures. The shape change of the liquid particles due to the plastic deformation of the Cu matrix is observed with electron imcroscopy. The occurrence of relaxation by the diffusion of the Cu atoms along the Cu/B 2 O 3 interface affects the shape change. The
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Interface-driven microstructure development and ultra high
Interface-driven microstructure development and ultra high strength of bulk nanostructured Cu-Nb multilayers fabricated by severe plastic deformationVolume 28 Issue 13Irene J. Beyerlein Nathan A. Mara John S. Carpenter Thomas Nizolek William M. Mook Thomas A. Wynn Rodney J. McCabe Jason R. Mayeur Keonwook Kang Shijian Zheng Jian Wang Tresa M. Pollock
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On the elastic–plastic decomposition of crystal
Mar 02 2012 · To verify the method we have simulated the shear deformation of a Cu single crystal at T = 300 K. As shown in figure 6 the initial configuration is a perfect fcc crystal in a periodic simulation box with the (1 1 2) and crystal directions aligned with the Cartesian axes x y and z respectively.
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Single Crystal Deformation
Single Crystal Deformation •To make the connection between dislocation behavior and yield strength as measured in tension consider the deformation of a single crystal. •Given an orientation for single slip i.e. the resolved shear stress reaches the critical value on one system ahead of all others then one obtains a "pack-of-
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Severe Plastic Deformation of Amorphous Alloys
into a dual microstructure containing nanocrystals (³5nm) and blocks (³50mm) of the crystalline mixture. The largest blocks initiate in the early stage of the HPT when the deformation is inherently inhomogeneous and the average temperature is well below Tg. On the other hand the smallest crystals grow homogeneously which is reminiscent to the
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Recrystallization (metallurgy)Wikipedia
Recrystallization is defined as the process in which grains of a crystal structure come in a new structure or new crystal shape. A precise definition of recrystallization is difficult to state as the process is strongly related to several other processes most notably recovery and grain growth.In some cases it is difficult to precisely define the point at which one process begins and another ends.
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Computational Materials Science
ture than the single crystal structure 19 . Based on MD simula-tions results of scratching polycrystalline Cu for investigating plastic deformation mechanism both dislocations and GB play a significant role in affecting plastic deformation 20 . Stress-induced crystallization of amorphous was observed in nano-
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Effect of strain rate in severe plastic deformation on
Jan 11 2011 · The interplay of large strain and large strain rate during high-rate severe plastic deformation (HR-SPD) lead to dynamic temperature rise in situ that engenders a recovered microstructure whose characteristics are not just a function of the strain but also of the strain rate and the coupled temperature rise during the deformation.
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(PDF) Differences in microstructure and texture
Cu and Al single crystals with the orientation (110) 001 were cold rolled and subsequently channel die compressed (CDC). The new direction of plastic flow during CDC was parallel to the former
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The low temperature lattice thermal conductivity of J W
The thermal conductivities of polycrystalline copper alloys containing 2 and 12 at. aluminium 10 at. . gold and 30 at. Zn have been measured between 1.5 and 4 2 K in the annealed state and after tensile deformation. A single crystal of Cu-12 at. AI has also been studied after various stages of deformation. It has been found
Get Price(PDF) Differences in microstructure and texture
Cu and Al single crystals with the orientation (110) 001 were cold rolled and subsequently channel die compressed (CDC). The new direction of plastic flow during CDC was parallel to the former
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Radiation-Induced Helium Nanobubbles Enhance Ductility
for in situ compressive test. (b and c) Postcompression images of the FD-Cu and NB-Cu single crystal pillars. Obvious sharp slip bands marked by white arrows are formed on FD-Cu pillar (b) while only smooth deformation profile is observed on NB-Cu pillar (c). (d) Engineering stress−strain curve of the FD-Cu and NB-Cu single crystal pillars.
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Interface-driven microstructure development and ultra high
Interface-driven microstructure development and ultra high strength of bulk nanostructured Cu-Nb multilayers fabricated by severe plastic deformationVolume 28 Issue 13Irene J. Beyerlein Nathan A. Mara John S. Carpenter Thomas Nizolek William M. Mook Thomas A. Wynn Rodney J. McCabe Jason R. Mayeur Keonwook Kang Shijian Zheng Jian Wang Tresa M. Pollock
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