Performance and prospects of severe plastic deformation for effective biomedical titanium alloys
- Mwita, Wambura Mwiryenyi, Akinlabi, Esther Titilayo, Sanusi, Kazeem Oladele
- Authors: Mwita, Wambura Mwiryenyi , Akinlabi, Esther Titilayo , Sanusi, Kazeem Oladele
- Date: 2018
- Subjects: Accumulative roll bonding , Asymmetric rolling , Biocompatibility
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/290389 , uj:31525 , Citation: Mwita, W.M, Akinlabi, E.T. & Sanusi, K.O. 2018. Performance and prospects of severe plastic deformation for effective biomedical titanium alloys. , ISSN: 2456-4834
- Description: Abstract: Application of severe plastic deformation (SPD) technology to process effective biomedical titanium alloys has shown promising results at laboratory scale. However, more research is still required before adopting this technology from laboratory scale to industrial scale production. This review presents performance and prospects of SPD for effective ultra-fine/nanograin structure-biomedical titanium alloys. Effective biomedical titanium alloys should have desired properties for the medical application. The properties include; high static and fatigue strengths, surface hardness for wear resistance, good ductility, corrosion resistance and biocompatibility. Based on current works reported in the literature, the review focused on; high-pressure torsion (HPT), equal channel angular pressing (ECAP), asymmetric rolling (AR), accumulative roll bonding (ARB) and repetitive corrugation and straightening (RCS). Overview of biomedical application of titanium alloys and desired material properties is presented. A detail discussion on the working principle, performance (e.g. induced strength, hardness, grain size and texture etc.) and material deformation homogeneity of each SPD method are presented. Also, prospects and challenges of each SPD method to be implemented at industrial scale for continuous and mass production are highlighted. The review concludes with the effectiveness of SPD processes, characteristics of processed samples and suggestion of future work for SPD to process effective biomedical titanium alloys at industrial scale.
- Full Text:
- Authors: Mwita, Wambura Mwiryenyi , Akinlabi, Esther Titilayo , Sanusi, Kazeem Oladele
- Date: 2018
- Subjects: Accumulative roll bonding , Asymmetric rolling , Biocompatibility
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/290389 , uj:31525 , Citation: Mwita, W.M, Akinlabi, E.T. & Sanusi, K.O. 2018. Performance and prospects of severe plastic deformation for effective biomedical titanium alloys. , ISSN: 2456-4834
- Description: Abstract: Application of severe plastic deformation (SPD) technology to process effective biomedical titanium alloys has shown promising results at laboratory scale. However, more research is still required before adopting this technology from laboratory scale to industrial scale production. This review presents performance and prospects of SPD for effective ultra-fine/nanograin structure-biomedical titanium alloys. Effective biomedical titanium alloys should have desired properties for the medical application. The properties include; high static and fatigue strengths, surface hardness for wear resistance, good ductility, corrosion resistance and biocompatibility. Based on current works reported in the literature, the review focused on; high-pressure torsion (HPT), equal channel angular pressing (ECAP), asymmetric rolling (AR), accumulative roll bonding (ARB) and repetitive corrugation and straightening (RCS). Overview of biomedical application of titanium alloys and desired material properties is presented. A detail discussion on the working principle, performance (e.g. induced strength, hardness, grain size and texture etc.) and material deformation homogeneity of each SPD method are presented. Also, prospects and challenges of each SPD method to be implemented at industrial scale for continuous and mass production are highlighted. The review concludes with the effectiveness of SPD processes, characteristics of processed samples and suggestion of future work for SPD to process effective biomedical titanium alloys at industrial scale.
- Full Text:
Process parameter interaction effect on the evolving properties of laser metal deposited titanium for biomedical applications
- Nyoni, Ezekiel, Akinlabi, Esther Titilayo
- Authors: Nyoni, Ezekiel , Akinlabi, Esther Titilayo
- Date: 2016
- Subjects: Biocompatibility , Dilution , Laser metal deposition
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/216973 , uj:21580 , Citation: Nyoni, E & Akinlabi, E.T. 2016. Process parameter interaction effect on the evolving properties of laser metal deposited titanium for biomedical applications.
- Description: Abstract: The laser power interaction effects on the evolving properties of commercially pure titanium during laser metal deposition were analysed. The optimized processing parameters obtained for this research study were, spot size of 4 mm, powder flow rate of 2 g/min, gas flow rate of 2 l/min, and the scanning speed set at 0.002m/s. A total of seven samples were fabricated by depositing titanium powder onto a Ti-6Al-4V base metal; using an Nd-Yag laser by varying the laser power from 400 to 1600 watts while keeping all the other parameters constant. The deposited samples were characterised through the evolving microstructure, microhardness, wear and the corrosion behaviour. The microstructural evaluation revealed that the ratio of dilution increased with an increase in the laser power. Furthermore, it was found that as the dilution increased, the wear resistance behaviour of the deposits decreased due to the increased foreign elements (Al and V) from the substrate which inhibited smooth fusion as the molten deposit cooled...
- Full Text:
- Authors: Nyoni, Ezekiel , Akinlabi, Esther Titilayo
- Date: 2016
- Subjects: Biocompatibility , Dilution , Laser metal deposition
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/216973 , uj:21580 , Citation: Nyoni, E & Akinlabi, E.T. 2016. Process parameter interaction effect on the evolving properties of laser metal deposited titanium for biomedical applications.
- Description: Abstract: The laser power interaction effects on the evolving properties of commercially pure titanium during laser metal deposition were analysed. The optimized processing parameters obtained for this research study were, spot size of 4 mm, powder flow rate of 2 g/min, gas flow rate of 2 l/min, and the scanning speed set at 0.002m/s. A total of seven samples were fabricated by depositing titanium powder onto a Ti-6Al-4V base metal; using an Nd-Yag laser by varying the laser power from 400 to 1600 watts while keeping all the other parameters constant. The deposited samples were characterised through the evolving microstructure, microhardness, wear and the corrosion behaviour. The microstructural evaluation revealed that the ratio of dilution increased with an increase in the laser power. Furthermore, it was found that as the dilution increased, the wear resistance behaviour of the deposits decreased due to the increased foreign elements (Al and V) from the substrate which inhibited smooth fusion as the molten deposit cooled...
- Full Text:
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