Results 131 to 140 of about 59,216 (158)

Effect of forging steps on microstructure evolution and mechanical properties of Ti-6Al-4V alloy during multidirectional isothermal forging

Procedia Manufacturing, 2020
Abstract In this study, the multidirectional isothermal forging (MDIF) was used to modify the β transformed microstructure into an equiaxed α+β structure in Ti-6Al-4V alloy. After two steps forging, the initial β grains were nearly disappeared.
Zhixiong Zhang
exaly   +2 more sources

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Superplastic properties in a Ti5Al3Mo1.5 V titan alloy processed by multidirectional forging process

Materials Letters, 2022
Abstract 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, Van Thao Le, Manh Hung Le, Truong An Nguyen   +3 more
openaire   +1 more source

Grain Refinement in a Low Carbon Steel Through Multidirectional Forging

Journal of Iron and Steel Research International, 2012
Grain 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
openaire   +1 more source

Numerical simulation, experiment, and optimization of a multidirectional die forging process for oil cutoff valves

Materials Today Communications, 2022
Ji Hongchao, Weichi Pei
exaly   +2 more sources

Controlling the microstructure and strength of copper submitted to multidirectional forging

Materials Science and Technology
Severe 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, Paula Cibely Alves Flausino, Nayara Aparecida Neres da Silva, Taise Matte Manhabosco, Pedro Henrique R Pereira, Maria Teresa Paulino Aguilar, Paulo Roberto Cetlin   +6 more
openaire   +1 more source

Multidirectional forging of AZ91 magnesium alloy and its effects on microstructures and mechanical properties

Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 2015
Abstract AZ91 alloy was subjected to multidirectional forging (MDF) and the relationship between microstructures and mechanical properties generated by MDF were investigated. The results showed that after 1 MDF pass grain size of the alloy decreased compared with as-cast alloy, and the amount of recrystallization grains increased when the MDF ...
M Y Zheng, K K Deng, K B Nie
exaly   +2 more sources

Influence of Multidirectional Forging on Microstructural, Mechanical, and Corrosion Behavior of Mg-Zn Alloy

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, Gajanan Anne, H. Shivananda Nayaka, Sandeep Sahu, M. R. Ramesh   +4 more
openaire   +1 more source

Effect of Multidirectional Forging and Subsequent Annealing to the Microstructure of Al-Mg-Mn Type Alloy

Solid State Phenomena, 2020
The grain refinement is important to improve both service properties at room temperature and superplasticity at elevated temperatures. This study focuses on the effect of multidirectional forging in isothermal conditions on the microstructure of Al-Mg-Mn-type alloy.
Anton D. Kotov, Mikhail Kishchik, Anastasia V. Mikhaylovskaya   +2 more
openaire   +1 more source

Influence of Strain Amplitude on the Microstructural Evolution and Flow Properties of Copper Processed by Multidirectional Forging

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, Maria Elisa Landim Nassif, Franco de Castro Bubani, Pedro Henrique R. Pereira, Maria Teresa Paulino Aguilar, Paulo Roberto Cetlin   +5 more
openaire   +2 more sources

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 Engineering
Shut-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, Long Chen, Weichi Pei, Wencui Xu, Jinye Wang, Shengqiang Liu   +5 more
openaire   +1 more source