The Experts below are selected from a list of 3276 Experts worldwide ranked by ideXlab platform
N.l. Richards - One of the best experts on this subject based on the ideXlab platform.
-
A preliminary model to predict the special grain boundary fraction in commercial-Purity Nickel
Journal of Materials Processing Technology, 2007Co-Authors: Brendan Guyot, N.l. RichardsAbstract:Abstract Special grain boundaries have been shown in numerous studies to be more resistant to creep, fracture behaviour, intergranular degradation, corrosion, and minor element segregation, leading to mechanical property improvements. To manipulate the fraction of special boundaries, thermo-mechanical processing can be used whereby a series of prescribed deformation and annealing heat treatments are used. However, the ranges and combinations of manufacturing process parameters can greatly affect the type and distribution of grain boundaries and therefore their selection is crucial to the resulting material properties. This study looks at an initial experimental attempt to correlate the effects of the manufacturing processing cycle parameters with the fraction of special boundaries produced in commercial-Purity Nickel. Process parameters such as percent reduction in thickness by cold rolling, annealing temperature, and number of cycles were studied, with annealing time kept constant. The analysis showed complex interactions between the independent variables from processing and the special fraction of grain boundaries as observed by Orientation Imaging Microscopy.
-
a study on the effect of cold rolling and annealing on special grain boundary fractions in commercial Purity Nickel
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2005Co-Authors: Brendan Guyot, N.l. RichardsAbstract:It has been known for decades that thermomechanical processing, through cold working and annealing can effectively increase the fraction of special low energy grain boundaries in many FCC metals. The focus of the reported work was to study the effects of cold rolling and annealing processing parameters on both the fraction of special boundaries and the random boundary connectivity in commercially pure Nickel. It was found that by using relatively low strain levels combined with high temperature anneals, it was possible to increase the fraction of special boundaries to 65% and severely fragment the random boundary connectivity.
Michael Ferry - One of the best experts on this subject based on the ideXlab platform.
-
Engineering low intensity planar textures in commercial Purity Nickel sheets by cross roll bonding
Materials Letters, 2017Co-Authors: Jiaqi Duan, M.z. Quadir, Michael FerryAbstract:Abstract Accumulative roll bonding is a severe plastic deformation technique capable of generating nano-scale microstructures in sheet metals. This technique can also be exploited for processing novel sheet products that are not possible through conventional rolling. In this investigation, cross rolling was combined with accumulative roll bonding of commercial Purity Nickel sheets, for obtaining an overall reduction in intensity of the deformation and recrystallization textures, which has been a long-time objective for obtaining drawable face centred cubic metal sheet. Overall, a significant reduction in the texture intensities were achieved by incorporating cross roll bonding. In particular, the dominance of the cube texture component, which readily forms in heavily cold rolled and annealed high stacking fault energy, face centred cubic metals and alloys, was suppressed by adopting this processing route. Texture-based Schmidt factor calculations points to a significant reduction in planar anisotropy of the cross rolled and annealed sheet, which is an important factor governing the earing propensity of deep drawn cups.
Brendan Guyot - One of the best experts on this subject based on the ideXlab platform.
-
A preliminary model to predict the special grain boundary fraction in commercial-Purity Nickel
Journal of Materials Processing Technology, 2007Co-Authors: Brendan Guyot, N.l. RichardsAbstract:Abstract Special grain boundaries have been shown in numerous studies to be more resistant to creep, fracture behaviour, intergranular degradation, corrosion, and minor element segregation, leading to mechanical property improvements. To manipulate the fraction of special boundaries, thermo-mechanical processing can be used whereby a series of prescribed deformation and annealing heat treatments are used. However, the ranges and combinations of manufacturing process parameters can greatly affect the type and distribution of grain boundaries and therefore their selection is crucial to the resulting material properties. This study looks at an initial experimental attempt to correlate the effects of the manufacturing processing cycle parameters with the fraction of special boundaries produced in commercial-Purity Nickel. Process parameters such as percent reduction in thickness by cold rolling, annealing temperature, and number of cycles were studied, with annealing time kept constant. The analysis showed complex interactions between the independent variables from processing and the special fraction of grain boundaries as observed by Orientation Imaging Microscopy.
-
a study on the effect of cold rolling and annealing on special grain boundary fractions in commercial Purity Nickel
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2005Co-Authors: Brendan Guyot, N.l. RichardsAbstract:It has been known for decades that thermomechanical processing, through cold working and annealing can effectively increase the fraction of special low energy grain boundaries in many FCC metals. The focus of the reported work was to study the effects of cold rolling and annealing processing parameters on both the fraction of special boundaries and the random boundary connectivity in commercially pure Nickel. It was found that by using relatively low strain levels combined with high temperature anneals, it was possible to increase the fraction of special boundaries to 65% and severely fragment the random boundary connectivity.
Jiaqi Duan - One of the best experts on this subject based on the ideXlab platform.
-
Engineering low intensity planar textures in commercial Purity Nickel sheets by cross roll bonding
Materials Letters, 2017Co-Authors: Jiaqi Duan, M.z. Quadir, Michael FerryAbstract:Abstract Accumulative roll bonding is a severe plastic deformation technique capable of generating nano-scale microstructures in sheet metals. This technique can also be exploited for processing novel sheet products that are not possible through conventional rolling. In this investigation, cross rolling was combined with accumulative roll bonding of commercial Purity Nickel sheets, for obtaining an overall reduction in intensity of the deformation and recrystallization textures, which has been a long-time objective for obtaining drawable face centred cubic metal sheet. Overall, a significant reduction in the texture intensities were achieved by incorporating cross roll bonding. In particular, the dominance of the cube texture component, which readily forms in heavily cold rolled and annealed high stacking fault energy, face centred cubic metals and alloys, was suppressed by adopting this processing route. Texture-based Schmidt factor calculations points to a significant reduction in planar anisotropy of the cross rolled and annealed sheet, which is an important factor governing the earing propensity of deep drawn cups.
M.z. Quadir - One of the best experts on this subject based on the ideXlab platform.
-
Engineering low intensity planar textures in commercial Purity Nickel sheets by cross roll bonding
Materials Letters, 2017Co-Authors: Jiaqi Duan, M.z. Quadir, Michael FerryAbstract:Abstract Accumulative roll bonding is a severe plastic deformation technique capable of generating nano-scale microstructures in sheet metals. This technique can also be exploited for processing novel sheet products that are not possible through conventional rolling. In this investigation, cross rolling was combined with accumulative roll bonding of commercial Purity Nickel sheets, for obtaining an overall reduction in intensity of the deformation and recrystallization textures, which has been a long-time objective for obtaining drawable face centred cubic metal sheet. Overall, a significant reduction in the texture intensities were achieved by incorporating cross roll bonding. In particular, the dominance of the cube texture component, which readily forms in heavily cold rolled and annealed high stacking fault energy, face centred cubic metals and alloys, was suppressed by adopting this processing route. Texture-based Schmidt factor calculations points to a significant reduction in planar anisotropy of the cross rolled and annealed sheet, which is an important factor governing the earing propensity of deep drawn cups.
