Characterization of corrosion behavior of laser beam formed titanium alloy
- Akinlabi, S.A., Mashinini, M.P., Fatoba, S.O., Abima, C.S.
- Authors: Akinlabi, S.A. , Mashinini, M.P. , Fatoba, S.O. , Abima, C.S.
- Date: 2018
- Subjects: Titanium Alloy , Corrosion Behaviour , Laser Beam Forming
- Language: English
- Type: Conference proceeding
- Identifier: http://hdl.handle.net/10210/290953 , uj:31594 , Citation: Akinlabi, S.A. et al. 2018. Characterization of corrosion behavior of laser beam formed titanium alloy.
- Description: Abstract: The application of Titanium and its alloys are found in various industries such as Aerospace, Human implant, Automotive, Chemical processing, Geothermal, and Armoury etc. The unique properties of Titanium have made it immune to all forms of environmental attacks such as the urban pollution, marine and industrial. However, It is believed that all manufacturing processes often influences the materials and mechanical properties of the processed material.. This paper reports on the corrosion behaviour of Laser Beam Formed Titanium Alloy. Titanium sheets were laser formed using three constant parameters (laser power of 0.8kW, the beam diameter of 12 mm and scan speed of 0.03m/min) and varied paramter which is the number of scans – 3, 5 and 7. The corrosion behaviour was after that investigated in a 3.5% NaCl solution using the Potentiodynamic Polarization technique. The Potentiodynamic polarization curves were measured at a scan rate of 2mV/s starting from 1000.0mV concerning OCP to 1100mV. The result revealed that the parent material had the most significant resistance to corrosion and the lowest corrosion rate per year. While for the Laser formed Titanium sheets, it was observed that as the number of scans increases the resistance to pitting was increased. However, the Titanium sheets samples formed at seven and five laser scans developed microcracks on the surface of the samples even though the resistance to corrosion is improved with the two sets of samples. These defects render the laser formed titanium sheets undesirable for intended applications.
- Full Text:
- Authors: Akinlabi, S.A. , Mashinini, M.P. , Fatoba, S.O. , Abima, C.S.
- Date: 2018
- Subjects: Titanium Alloy , Corrosion Behaviour , Laser Beam Forming
- Language: English
- Type: Conference proceeding
- Identifier: http://hdl.handle.net/10210/290953 , uj:31594 , Citation: Akinlabi, S.A. et al. 2018. Characterization of corrosion behavior of laser beam formed titanium alloy.
- Description: Abstract: The application of Titanium and its alloys are found in various industries such as Aerospace, Human implant, Automotive, Chemical processing, Geothermal, and Armoury etc. The unique properties of Titanium have made it immune to all forms of environmental attacks such as the urban pollution, marine and industrial. However, It is believed that all manufacturing processes often influences the materials and mechanical properties of the processed material.. This paper reports on the corrosion behaviour of Laser Beam Formed Titanium Alloy. Titanium sheets were laser formed using three constant parameters (laser power of 0.8kW, the beam diameter of 12 mm and scan speed of 0.03m/min) and varied paramter which is the number of scans – 3, 5 and 7. The corrosion behaviour was after that investigated in a 3.5% NaCl solution using the Potentiodynamic Polarization technique. The Potentiodynamic polarization curves were measured at a scan rate of 2mV/s starting from 1000.0mV concerning OCP to 1100mV. The result revealed that the parent material had the most significant resistance to corrosion and the lowest corrosion rate per year. While for the Laser formed Titanium sheets, it was observed that as the number of scans increases the resistance to pitting was increased. However, the Titanium sheets samples formed at seven and five laser scans developed microcracks on the surface of the samples even though the resistance to corrosion is improved with the two sets of samples. These defects render the laser formed titanium sheets undesirable for intended applications.
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Effect of FSW on the mechanical properties and microstructure of 6082-T6 AA
- Akinlabi, S.A., Mashinini, M.P., Fatoba, S.O., Akinlabi, Esther Titilayo
- Authors: Akinlabi, S.A. , Mashinini, M.P. , Fatoba, S.O. , Akinlabi, Esther Titilayo
- Date: 2018
- Subjects: Friction Stir Welding , Heat Input , Joint Efficiency
- Language: English
- Type: Conference proceeding
- Identifier: http://hdl.handle.net/10210/290944 , uj:31593 , Citation: Akinlabi, S.A. et al. 2018. Effect of FSW on the mechanical properties and microstructure of 6082-T6 AA.
- Description: Abstract: This paper reports the effect of Friction Stir Welding on the mechanical properties and microstructure of 6082- T6 Aluminium alloy. The welds were produced using three different transverse speeds of 90, 120 and 150m/min to vary the heat input to the wields. The rotational speed of 750rpm is constant for the three welds samples, plunge depth of 0.31mm and tool tilt angle of 3 degrees was employed. The mechanical properties were characterised by the tensile analysis, the microhardness and joint efficiency of the welded interface. The microstructures, macrostructures, fracture surface and grain sizes were characterised. The result revealed that tensile strength at the joint interfaces of the three samples was enhanced as the transverse speed increases from 90m/min to 150m/min. The joint efficiency of the joint interfaces of the three welded samples increases. The Vickers hardness values at the joint interfaces were enhanced for the three samples when compared with the base material. This is attributed to the strain hardening phenomenon. The resulting microstructural characterization shows that good metallurgical bonding was achieved at the joint interfaces of the welds produced, this is evident with the presence of the transition region separating the advancing side from the retreating side of the joint interfaces.
- Full Text:
- Authors: Akinlabi, S.A. , Mashinini, M.P. , Fatoba, S.O. , Akinlabi, Esther Titilayo
- Date: 2018
- Subjects: Friction Stir Welding , Heat Input , Joint Efficiency
- Language: English
- Type: Conference proceeding
- Identifier: http://hdl.handle.net/10210/290944 , uj:31593 , Citation: Akinlabi, S.A. et al. 2018. Effect of FSW on the mechanical properties and microstructure of 6082-T6 AA.
- Description: Abstract: This paper reports the effect of Friction Stir Welding on the mechanical properties and microstructure of 6082- T6 Aluminium alloy. The welds were produced using three different transverse speeds of 90, 120 and 150m/min to vary the heat input to the wields. The rotational speed of 750rpm is constant for the three welds samples, plunge depth of 0.31mm and tool tilt angle of 3 degrees was employed. The mechanical properties were characterised by the tensile analysis, the microhardness and joint efficiency of the welded interface. The microstructures, macrostructures, fracture surface and grain sizes were characterised. The result revealed that tensile strength at the joint interfaces of the three samples was enhanced as the transverse speed increases from 90m/min to 150m/min. The joint efficiency of the joint interfaces of the three welded samples increases. The Vickers hardness values at the joint interfaces were enhanced for the three samples when compared with the base material. This is attributed to the strain hardening phenomenon. The resulting microstructural characterization shows that good metallurgical bonding was achieved at the joint interfaces of the welds produced, this is evident with the presence of the transition region separating the advancing side from the retreating side of the joint interfaces.
- Full Text:
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