A review : plastic deformation through equal channel angular pressing
- Erinosho, Mutiu F., Akinlabi, Esther Titilayo
- Authors: Erinosho, Mutiu F. , Akinlabi, Esther Titilayo
- Date: 2016
- Subjects: Microstructural evolution , Severe plastic deformation , Strain path
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/92397 , uj:20225 , Citation: Erinosho, M.F. & Akinlabi, E.T. 2016. A review : plastic deformation through equal channel angular pressing.
- Description: Abstract: In most manufacturing processes, objects of the required shape and size are produced through plastic deformation; sometimes by deforming the product itself through rolling, extrusion, drawing etc, and by deforming the metal removed through grinding, milling and cutting operation. In these processes, a load of appreciable magnitude is applied on the material subjected to deformation, and the plastic flow thus produced is suitably restricted to get the desired shape and size. Equal Channel Angular Pressing (ECAP) is very capable of producing ultrafine grained microstructures and improves the mechanical properties of the deformed materials. The variations in strain path directions during deformation have significantly effect on the physical and mechanical response of distorted metals.
- Full Text:
- Authors: Erinosho, Mutiu F. , Akinlabi, Esther Titilayo
- Date: 2016
- Subjects: Microstructural evolution , Severe plastic deformation , Strain path
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/92397 , uj:20225 , Citation: Erinosho, M.F. & Akinlabi, E.T. 2016. A review : plastic deformation through equal channel angular pressing.
- Description: Abstract: In most manufacturing processes, objects of the required shape and size are produced through plastic deformation; sometimes by deforming the product itself through rolling, extrusion, drawing etc, and by deforming the metal removed through grinding, milling and cutting operation. In these processes, a load of appreciable magnitude is applied on the material subjected to deformation, and the plastic flow thus produced is suitably restricted to get the desired shape and size. Equal Channel Angular Pressing (ECAP) is very capable of producing ultrafine grained microstructures and improves the mechanical properties of the deformed materials. The variations in strain path directions during deformation have significantly effect on the physical and mechanical response of distorted metals.
- Full Text:
Evaluation of structural integrity of laser formed steel sheets for possible load bearing applications
- Akinlabi, Stephen A., Shukla, M.
- Authors: Akinlabi, Stephen A. , Shukla, M.
- Date: 2016
- Subjects: Structural integrity , Laser forming , Microstructural evolution
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/215436 , uj:21417 , Citation: Akinlabi, S.A & Shukla, M. 2016. Evaluation of structural integrity of laser formed steel sheets for possible load bearing applications.
- Description: Abstract: Steel is a well-known material for various manufacturing applications because of its unique properties such as great formability and durability, good tensile and yield strength and good thermal conductivity. This paper reports on the evaluation of the structural integrity of laser formed steel sheets for possible load carrying applications. The tensile tests conducted revealed 46% elongation while the yield strength of the laser formed components were enhanced with about 18%. Furthermore, elongated grain structures were observed in the micrographs of the three components formed at the maximum parameter setting. It was revealed that this elongation varied indirectly to the applied line energy. The measured grain sizes further showed that the components formed at the optimized maximum process parameter window were characterized by smaller grain structures with about 60% of the grain sizes of the parent material. A progressive increase in the micro Vickers hardness of about 40% was also observed in the three laser formed components in comparison to the parent material. The analysis of the residual stresses conducted in this study revealed that the changes in the residual stresses are a function of the process condition to which the samples were subjected...
- Full Text:
- Authors: Akinlabi, Stephen A. , Shukla, M.
- Date: 2016
- Subjects: Structural integrity , Laser forming , Microstructural evolution
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/215436 , uj:21417 , Citation: Akinlabi, S.A & Shukla, M. 2016. Evaluation of structural integrity of laser formed steel sheets for possible load bearing applications.
- Description: Abstract: Steel is a well-known material for various manufacturing applications because of its unique properties such as great formability and durability, good tensile and yield strength and good thermal conductivity. This paper reports on the evaluation of the structural integrity of laser formed steel sheets for possible load carrying applications. The tensile tests conducted revealed 46% elongation while the yield strength of the laser formed components were enhanced with about 18%. Furthermore, elongated grain structures were observed in the micrographs of the three components formed at the maximum parameter setting. It was revealed that this elongation varied indirectly to the applied line energy. The measured grain sizes further showed that the components formed at the optimized maximum process parameter window were characterized by smaller grain structures with about 60% of the grain sizes of the parent material. A progressive increase in the micro Vickers hardness of about 40% was also observed in the three laser formed components in comparison to the parent material. The analysis of the residual stresses conducted in this study revealed that the changes in the residual stresses are a function of the process condition to which the samples were subjected...
- Full Text:
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