Results 141 to 150 of about 278 (172)
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Condition of Carbides in High-Speed Steels after Multidirectional Forging
Defect and Diffusion Forum, 2019Although heat treatment of high-speed steels has been covered in numerous treatises, their microstructure before treatment still receives insufficient attention. This article therefore explores the relationship between the initial microstructure and resultant properties in heat treated steels for cutting tools and sonotrodes (special tools for ...
Kříž, Antonín, Průcha, Vojtěch
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Superplastic properties in a Ti5Al3Mo1.5 V titan alloy processed by multidirectional forging process
Materials Letters, 2022Abstract In this study, ultrafine grains in microstructures of Ti5Al3Mo1.5 V titan alloy was achieved by the multidirectional forging (MDF) process. The essence of the MDF is pressing steps combined with rotations of the workpiece in all directions within a forging cycle. The MDF process was performed for one to three cycles at temperatures from 850 °
Manh Tien Nguyen +3 more
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Grain Refinement in a Low Carbon Steel Through Multidirectional Forging
Journal of Iron and Steel Research International, 2012Grain refinement is one of the successful and low-cost methods to develop metals having excellent combination of strength and ductility. Low carbon steel was deformed by using multidirectional forging (MDF) technique at room temperature. The influence of strain amount and annealing process on the microstructure and mechanical properties of investigated
V. Soleymani, B. Eghbali
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Controlling the microstructure and strength of copper submitted to multidirectional forging
Materials Science and TechnologySevere plastic deformation (SPD) techniques have been widely used to enhance strength and promote grain refinement in metals. Multi-Directional Forging (MDF), based on successive compressions with strain path changes, enables tailoring of microstructure and mechanical properties by controlling strain amplitude (Δ
Maria Elisa Landim Nassif +6 more
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Numerical simulation and optimization of multidirectional forging for shut-off valve body
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical EngineeringShut-off valve bodies are widely used in the petrochemical industry. When oil wells require maintenance or in emergency situations (such as signs of a blowout), these valves can rapidly seal off oil and gas pathways, preventing uncontrolled spills and ensuring personnel and equipment safety.
Hongchao Ji +5 more
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Journal of Materials Engineering and Performance, 2019
Multidirectional forging (MDF) was applied to Mg-6%Zn alloy up to 5 passes successfully at 280 °C. MDF-processed materials were characterized using optical microscope, scanning electron microscope, electron backscatter diffraction, transmission electron microscope, and x-ray diffraction. Obtained results showed a significant reduction in grain size (up
S. Ramesh +4 more
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Multidirectional forging (MDF) was applied to Mg-6%Zn alloy up to 5 passes successfully at 280 °C. MDF-processed materials were characterized using optical microscope, scanning electron microscope, electron backscatter diffraction, transmission electron microscope, and x-ray diffraction. Obtained results showed a significant reduction in grain size (up
S. Ramesh +4 more
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Advanced Engineering Materials, 2020
Commercial‐purity copper (99.8%) is processed by multidirectional forging (MDF) using strain amplitudes per compression (Δε) of 0.15 and 0.30, leading to accumulated strains (ε) of up to ≈10.8. It is shown that increasing the accumulated strain causes continuous reactions at the substructural level, involving the progressive evolution of dislocation ...
Paula Cibely Alves Flausino +5 more
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Commercial‐purity copper (99.8%) is processed by multidirectional forging (MDF) using strain amplitudes per compression (Δε) of 0.15 and 0.30, leading to accumulated strains (ε) of up to ≈10.8. It is shown that increasing the accumulated strain causes continuous reactions at the substructural level, involving the progressive evolution of dislocation ...
Paula Cibely Alves Flausino +5 more
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Journal of Materials Engineering and Performance, 2019
In the present paper, multidirectional forging (MDF), as a severe plastic deformation process, was carried out on an extruded AM60 magnesium alloy. The microstructure, texture, and mechanical properties of the MDFed samples were examined. Microstructural findings indicated that the grain size of the alloy decreased from 10.2 to 3.7 µm after six MDF ...
M. A. Salevati +2 more
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In the present paper, multidirectional forging (MDF), as a severe plastic deformation process, was carried out on an extruded AM60 magnesium alloy. The microstructure, texture, and mechanical properties of the MDFed samples were examined. Microstructural findings indicated that the grain size of the alloy decreased from 10.2 to 3.7 µm after six MDF ...
M. A. Salevati +2 more
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Journal of Alloys and Compounds, 2019
Abstract The as-cast Mg-4Zn-2Gd-0.5Ca alloy mainly contained I phase and W phase, while the I phase dissolved into Mg substrate after homogenization treatment which improved the alloy’s corrosion resistance. After the application of multidirectional forging (MDF), the grains were refined obviously accompanied with the precipitation of I phase.
Fang-fang Cao +4 more
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Abstract The as-cast Mg-4Zn-2Gd-0.5Ca alloy mainly contained I phase and W phase, while the I phase dissolved into Mg substrate after homogenization treatment which improved the alloy’s corrosion resistance. After the application of multidirectional forging (MDF), the grains were refined obviously accompanied with the precipitation of I phase.
Fang-fang Cao +4 more
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