Microstructure evolution and mechanical characterization of friction stir welded titanium alloy Ti–6Al–4V using lanthanated tungsten tool
- Mashinini, P.M., Dinaharan, I., Selvama, J. David Raja, Hattingh, D.G.
- Authors: Mashinini, P.M. , Dinaharan, I. , Selvama, J. David Raja , Hattingh, D.G.
- Date: 2018
- Subjects: Titanium alloy , Friction stir welding , Microstructure
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/273276 , uj:29110 , Citation: Mashinini, P.M. et al. 2018. Microstructure evolution and mechanical characterization of friction stir welded titanium alloy Ti–6Al–4V using lanthanated tungsten tool.
- Description: Abstract: Friction stir welding (FSW) exhibits significant advantages to join titanium and its alloys compared to other welding methods. FSW of 3 mm thick titanium alloy Ti–6Al–4V sheets was carried out using a lanthanated tungsten alloy tool. The traverse speed was varied from 40 mm/min to 200 mm/min in steps of 80 mm/min by keeping other parameters constant. The microstructure evolution was observed using conventional and advanced characterization techniques. The micrographs revealed a fully developed lamellar structure at 40 mm/min and a recrystallized structure in rest of the joints. An increase in β phase was observed at HAZ while TMAZ showed a distorted structure. The average grain size was observed to reduce with an increase in traverse speed. No tool wear debris was observed in the stir zone while a worm hole defect was noticed at 200 mm/min. Ti–6Al–4V hardened...
- Full Text:
- Authors: Mashinini, P.M. , Dinaharan, I. , Selvama, J. David Raja , Hattingh, D.G.
- Date: 2018
- Subjects: Titanium alloy , Friction stir welding , Microstructure
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/273276 , uj:29110 , Citation: Mashinini, P.M. et al. 2018. Microstructure evolution and mechanical characterization of friction stir welded titanium alloy Ti–6Al–4V using lanthanated tungsten tool.
- Description: Abstract: Friction stir welding (FSW) exhibits significant advantages to join titanium and its alloys compared to other welding methods. FSW of 3 mm thick titanium alloy Ti–6Al–4V sheets was carried out using a lanthanated tungsten alloy tool. The traverse speed was varied from 40 mm/min to 200 mm/min in steps of 80 mm/min by keeping other parameters constant. The microstructure evolution was observed using conventional and advanced characterization techniques. The micrographs revealed a fully developed lamellar structure at 40 mm/min and a recrystallized structure in rest of the joints. An increase in β phase was observed at HAZ while TMAZ showed a distorted structure. The average grain size was observed to reduce with an increase in traverse speed. No tool wear debris was observed in the stir zone while a worm hole defect was noticed at 200 mm/min. Ti–6Al–4V hardened...
- Full Text:
Microstructural characterization and sliding wear behavior of Cu/TiC copper matrix composites developed using friction stir processing
- Dinaharan, I., Akinlabi, Esther Titilayo, Hattingh, D.G.
- Authors: Dinaharan, I. , Akinlabi, Esther Titilayo , Hattingh, D.G.
- Date: 2018
- Subjects: Copper matrix composites , Friction stir processing , Titanium carbide
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/290698 , uj:31562 , Citation: Dinaharan, I., Akinlabi, E.T. & Hattingh, D.G. 2018. Microstructural characterization and sliding wear behavior of Cu/TiC copper matrix composites developed using friction stir processing.
- Description: Abstract: The relatively new severe plastic deformation method, friction stir processing (FSP) is a cutting-edge process to synthesize surface and bulk metal matrix composites. The present work is focused to produce Cu/TiC copper matrix composites (CMCs) and investigate the microstructure and sliding wear behavior at room temperature without lubrication. In the beginning of the process, TiC particulates were pressed in a machined groove on the surface of copper plates. The dimensions of the groove were altered to produce four different volume fractions of TiC particulates (0, 6, 12, and 18 vol.%). FSP was accomplished by an optimized set of process parameters. The microstructure was observed using optical microscopy, scanning electron microscopy (SEM) and electron back scattered diffraction (EBSD). The microstructures showed a consistent dispersion of TiC particulates in the copper matrix irrespective of the volume fraction. The dispersion was observed to be uniform across the whole stir zone region. The interfacial bonding with the copper was proper. The reinforcement of TiC particulates enhanced the microhardness and led to a reduction the wear rate of the composite remarkably. TiC particulates changed the wear mechanism and the...
- Full Text:
- Authors: Dinaharan, I. , Akinlabi, Esther Titilayo , Hattingh, D.G.
- Date: 2018
- Subjects: Copper matrix composites , Friction stir processing , Titanium carbide
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/290698 , uj:31562 , Citation: Dinaharan, I., Akinlabi, E.T. & Hattingh, D.G. 2018. Microstructural characterization and sliding wear behavior of Cu/TiC copper matrix composites developed using friction stir processing.
- Description: Abstract: The relatively new severe plastic deformation method, friction stir processing (FSP) is a cutting-edge process to synthesize surface and bulk metal matrix composites. The present work is focused to produce Cu/TiC copper matrix composites (CMCs) and investigate the microstructure and sliding wear behavior at room temperature without lubrication. In the beginning of the process, TiC particulates were pressed in a machined groove on the surface of copper plates. The dimensions of the groove were altered to produce four different volume fractions of TiC particulates (0, 6, 12, and 18 vol.%). FSP was accomplished by an optimized set of process parameters. The microstructure was observed using optical microscopy, scanning electron microscopy (SEM) and electron back scattered diffraction (EBSD). The microstructures showed a consistent dispersion of TiC particulates in the copper matrix irrespective of the volume fraction. The dispersion was observed to be uniform across the whole stir zone region. The interfacial bonding with the copper was proper. The reinforcement of TiC particulates enhanced the microhardness and led to a reduction the wear rate of the composite remarkably. TiC particulates changed the wear mechanism and the...
- Full Text:
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