high pressure torsion
High Pressure Torsion for Pure Chromium and Niobium
... Two kinds of body centered cubic (bcc) structure refractory metals, pure Cr and Nb, were subjected to severe plastic deformation through high-pressure torsion (HPT) under applied pressures of 2 and 6 ...
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Application of High Pressure Torsion to WC Co Ceramic Based Composites for Improvement of Consolidation, Microstructure and Hardness
... by high-pressure torsion (HPT) followed by sintering at lower sintering temperatures or shorter sintering time than hot isostatic pressing (HIP) and compression and ...with high dislocation ...
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Optimization of Microstructure and Mechanical Properties of Co Cr Mo Alloys by High Pressure Torsion and Subsequent Short Annealing
... The main target of this study is to optimize the microstructure and to achieve an optimization for the mechanical properties in a biomedi- cal Co-Cr-Mo (CCM) alloy with the nominal composition of Co–28Cr–6Mo (mass%) ...
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Grain Refinement Mechanism and Evolution of Dislocation Structure of Co Cr Mo Alloy Subjected to High Pressure Torsion
... (ECAP), high-pressure torsion (HPT), accumulative roll bonding (ARB), and cyclic extrusion compression (CEC) are being used to process coarse-grained materials to realize ultrafine microstructure by ...
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Effect of Nanocrystallization and Twinning on Hardness in Ni3Al Deformed by High Pressure Torsion
... plastic deformation by high-pressure torsion had a mainly nanocrystalline structure along with a small volume fraction of coarse fragmented grains. The nanocrystalline grains contain a large number ...
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Inhomogeneous Hardness Distribution of High Pressure Torsion Processed IF Steel Disks
... of High Pressure Torsion (HPT) is considered to be the most successful procedure for producing ultrafine-grained (UFG) materials with exceptionally small grain sizes on submicrometer or nanometer ...
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Effect of Strain Path in High Pressure Torsion Process on Hardening in Commercial Purity Titanium
... in high-pressure torsion (HPT) process on hardening was investigated in commercial purity titanium ...a pressure of P ¼ 5 GPa, the obtained Vickers microhardness, Hv, was around ...with ...
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Real Hydrostatic Pressure in High Pressure Torsion Measured by Bismuth Phase Transformations and FEM Simulations
... Hydrostatic pressure is a significant parameter influencing the evolution of microstructure and phase transformations in the high-pressure torsion (HPT) ...hydrostatic pressure during ...
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Work Hardening and Microstructural Development during High Pressure Torsion in Pure Iron
... The work hardening behavior and the developments of microstructure and crystallographic texture during high-pressure torsion (HPT) in pure iron were investigated. A set of the 3D electron backscatter ...
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Heterogeneous Process of Disordering and Structural Refinement in Ni3Al during Severe Plastic Deformation by High Pressure Torsion
... The High-Pressure Torsion (HPT) method opened a pathway to investigate these compounds since the large torsion deformation is applied under quasi-hydrostatic conditions which significantly sup- ...
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Effects of High Pressure Torsion on the Pitting Corrosion Resistance of Aluminum Iron Alloys
... (ECAP), high- pressure torsion (HPT), or continuous rotation evolutional control (CREO) is increasingly being studied with the aim of improving mechanical properties such as strength and ...
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Microstructural Evolution in Pure Aluminum in the Early Stages of Processing by High Pressure Torsion
... Measurements were taken to evaluate the evolution of homogeneity in disks of high-purity aluminum in the early stages of processing by high-pressure torsion. The results demonstrate that ...
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Cytocompatibility of Ti 6Al 7Nb through High Pressure Torsion Processing
... In this study, we evaluated the cytocompatibility of high-pressure torsion (HPT)-processed Ti-6Al-7Nb alloys. Grain size of titanium (Ti) alloys decreased from 5 µm (without HPT processing, HPT-0) to ...
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Critical Temperature in Bulk Ultrafine Grained Superconductors of Nb, V, and Ta Processed by High Pressure Torsion
... by high-pressure torsion ...a high density of grain boundaries, dislocations, and other crystalline defects modify the superconducting order ...
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Microstructures and Mechanical Properties of Pure V and Mo Processed by High Pressure Torsion
... (ECAP), high-pressure torsion (HPT), accumulative roll bonding (ARB), multi directional forging (MDF), cyclic extrusion and compression (CEC) and repetitive corrugation and strengthening ...
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High Pressure Torsion Deformation Induced Phase Transformations and Formations: New Material Combinations and Advanced Properties
... Heavy plastic shear deformation at relatively low homologous temperatures is called high-pressure torsion (HPT) deformation, which is one method of severe plastic deformation (SPD). The aim of the ...
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Microstructural and Mechanical Characteristics of AZ61 Magnesium Alloy Processed by High Pressure Torsion
... Experiments were conducted on an AZ61 magnesium alloy to evaluate the microstructural characteristics and the mechanical properties after processing by High-Pressure Torsion (HPT). The results show ...
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Bulk State Reactions and Improving the Mechanical Properties of Metals through High Pressure Torsion
... This report presents an overview of recent studies demonstrating a bulk-state reaction involving mechanical bonding through the application of high-pressure torsion (HPT) processing on two dissimilar ...
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Metallurgical Alchemy by Ultra Severe Plastic Deformation via High Pressure Torsion Process
... the high-pressure torsion (HPT) method con fi rmed that signi fi cant changes occur at shear strains in the range of 1,000 .../ high plasticity / room-temperature superplasticity, and ...
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Evolution of Mechanical Properties and Microstructures with Equivalent Strain in Pure Fe Processed by High Pressure Torsion
... Pure Fe (99.96%) was processed by high pressure torsion (HPT) using disc and ring samples. When the microhardness and tensile properties are plotted against the equivalent strain, the individual ...
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