Microstructure evolution in AZ61 alloy processed by Equal Channel Angular Pressing
- Avvari, Muralidhar, Narendranath, S., Able, Mashamba
- Authors: Avvari, Muralidhar , Narendranath, S. , Able, Mashamba
- Date: 2016
- Subjects: ECAP, AZ61 alloy , Grain refinement , Microstructures
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/91541 , uj:20114 , Citation: Avvari, M. & Able, M. 2016. Microstructure evolution in AZ61 alloy processed by Equal Channel Angular Pressing.
- Description: Abstract: Magnesium and its alloys have play an strategic role in many applications like aerospace, automobile, nuclear, electrical and structural engineering due to its strength to weight ratio is very low when compared to aluminum, Titanium and steel. In the present work, AZ61 wrought magnesium alloy was processed by using Equal Channel Angular Pressing (ECAP) at three different temperatures of 483 K, 523 K and 573 K using up to four ECAP passes. A microstructural study was conducted by measuring the average grain size after each pass, for the three different processing temperatures. The mechanical properties of the processed samples were noted to improve due to the reduction in the grain size after each ECAP pass. After four ECAP passes, the average grain size of the AZ61 samples was found to be reduced to 85%, 81%, and 70% for the pressing temperatures of 483 K, 523 K and 573 K respectively. The tensile strength of the AZ61 alloy increased with increase in number of ECAP passes for each of the temperatures when compared to as-received alloy. For instances, for the processing temperature of 483 K, 523 K and 573 K, the tensile strength increased to 24%, 10%, and 12% respectively at four ECAP pass. Also, the percentage elongation of the alloy was increased with increase in processing temperatures. Moreover, fracture topographies of the tensile surfaces are illustrated through scanning electron microcopy and reveal ductile fracture than as received alloy for four passes at each ECAP processing temperature.
- Full Text:
- Authors: Avvari, Muralidhar , Narendranath, S. , Able, Mashamba
- Date: 2016
- Subjects: ECAP, AZ61 alloy , Grain refinement , Microstructures
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/91541 , uj:20114 , Citation: Avvari, M. & Able, M. 2016. Microstructure evolution in AZ61 alloy processed by Equal Channel Angular Pressing.
- Description: Abstract: Magnesium and its alloys have play an strategic role in many applications like aerospace, automobile, nuclear, electrical and structural engineering due to its strength to weight ratio is very low when compared to aluminum, Titanium and steel. In the present work, AZ61 wrought magnesium alloy was processed by using Equal Channel Angular Pressing (ECAP) at three different temperatures of 483 K, 523 K and 573 K using up to four ECAP passes. A microstructural study was conducted by measuring the average grain size after each pass, for the three different processing temperatures. The mechanical properties of the processed samples were noted to improve due to the reduction in the grain size after each ECAP pass. After four ECAP passes, the average grain size of the AZ61 samples was found to be reduced to 85%, 81%, and 70% for the pressing temperatures of 483 K, 523 K and 573 K respectively. The tensile strength of the AZ61 alloy increased with increase in number of ECAP passes for each of the temperatures when compared to as-received alloy. For instances, for the processing temperature of 483 K, 523 K and 573 K, the tensile strength increased to 24%, 10%, and 12% respectively at four ECAP pass. Also, the percentage elongation of the alloy was increased with increase in processing temperatures. Moreover, fracture topographies of the tensile surfaces are illustrated through scanning electron microcopy and reveal ductile fracture than as received alloy for four passes at each ECAP processing temperature.
- Full Text:
Microstructure and mechanical properties of ultra-fine grained copper processed by equal channel angular pressing technique
- Sanusi, Kazeem O., Afolabi, Ayo S., Muzenda, Edison
- Authors: Sanusi, Kazeem O. , Afolabi, Ayo S. , Muzenda, Edison
- Date: 2014
- Subjects: Tensile properties , Equal channel angular pressing technique , Grain refinement , Ultra-fine grained copper
- Type: Article
- Identifier: uj:5005 , ISSN 2078-0966 , http://hdl.handle.net/10210/13145
- Description: The equal channel angular pressing (ECAP) technique is now recognised for achieving very significant grain refinement of ultra-fine grained materials which, at present produce unique mechanical properties. This study reports the results of the tensile tests and the microstructural analysis carried out on the specimens of ultra-fine grained (UFG) copper processed by ECAP technique at room temperature using a die with a 126o between the die channels. The copper samples used in this work were subjected to six and twelve passes during the ECAP processing. Tensile tests were conducted for samples cut out in two different directions; in the parallel and perpendicular direction at room temperature to evaluate the mechanical properties after the ECAP at these two directions. The microstructural characterization was carried out using optical electron microscope (OEM) and scanning electronic microscope (SEM). The results show ECAP technique introducing significant grain refinement and produced ultrafine grains in copper and there is a potential for achieving high ductility in the copper alloy after processing. The tested sample is characterized by significant differences of strength properties depending on the direction.
- Full Text:
- Authors: Sanusi, Kazeem O. , Afolabi, Ayo S. , Muzenda, Edison
- Date: 2014
- Subjects: Tensile properties , Equal channel angular pressing technique , Grain refinement , Ultra-fine grained copper
- Type: Article
- Identifier: uj:5005 , ISSN 2078-0966 , http://hdl.handle.net/10210/13145
- Description: The equal channel angular pressing (ECAP) technique is now recognised for achieving very significant grain refinement of ultra-fine grained materials which, at present produce unique mechanical properties. This study reports the results of the tensile tests and the microstructural analysis carried out on the specimens of ultra-fine grained (UFG) copper processed by ECAP technique at room temperature using a die with a 126o between the die channels. The copper samples used in this work were subjected to six and twelve passes during the ECAP processing. Tensile tests were conducted for samples cut out in two different directions; in the parallel and perpendicular direction at room temperature to evaluate the mechanical properties after the ECAP at these two directions. The microstructural characterization was carried out using optical electron microscope (OEM) and scanning electronic microscope (SEM). The results show ECAP technique introducing significant grain refinement and produced ultrafine grains in copper and there is a potential for achieving high ductility in the copper alloy after processing. The tested sample is characterized by significant differences of strength properties depending on the direction.
- Full Text:
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