A numerical analysis of machining induced residual stresses of Grade 5 titanium alloy
- Laubscher, R.F., Styger, G., Oosthuizen, G.A.
- Authors: Laubscher, R.F. , Styger, G. , Oosthuizen, G.A.
- Date: 2014-06
- Subjects: Numerical analysis , Machining , Residual stresses , Titanium alloys
- Type: Article
- Identifier: uj:5055 , http://hdl.handle.net/10210/13603
- Description: Machining induced residual stresses may have a significant effect on the mechanical performance of machined parts. AdvantEdge is an advanced finite element code dedicated to the modelling of the machining process. This paper describes a comparative evaluation of modelling results obtained with AdvantEdge with experimental results obtained during turning of Grade 5 (Ti6Al4V) titanium alloy. A two dimensional orthogonal turning process is modelled and compared with experimental data. Comparisons are made relative to residual stress, cutting force and cutting temperature for various different cutting parameters including cutting speed, feed rate and cut depth.
- Full Text:
- Authors: Laubscher, R.F. , Styger, G. , Oosthuizen, G.A.
- Date: 2014-06
- Subjects: Numerical analysis , Machining , Residual stresses , Titanium alloys
- Type: Article
- Identifier: uj:5055 , http://hdl.handle.net/10210/13603
- Description: Machining induced residual stresses may have a significant effect on the mechanical performance of machined parts. AdvantEdge is an advanced finite element code dedicated to the modelling of the machining process. This paper describes a comparative evaluation of modelling results obtained with AdvantEdge with experimental results obtained during turning of Grade 5 (Ti6Al4V) titanium alloy. A two dimensional orthogonal turning process is modelled and compared with experimental data. Comparisons are made relative to residual stress, cutting force and cutting temperature for various different cutting parameters including cutting speed, feed rate and cut depth.
- Full Text:
Residual stress depth profiling of commercially pure titanium subjected to high-speed machining using energy dispersive diffraction
- Janse van Rensburg, N., Madyira, D.M., Laubscher, R.F., Oosthuizen, G.A.
- Authors: Janse van Rensburg, N. , Madyira, D.M. , Laubscher, R.F. , Oosthuizen, G.A.
- Date: 2013
- Subjects: Residual stress , Energy dispersive diffraction , Titanium - Mechanical properties
- Type: Article
- Identifier: uj:4948 , http://hdl.handle.net/10210/13048
- Description: Residual stress is well-known to influence the mechanical properties of machined components. The magnitude and distribution of these stresses are critical to determine the component’s life, specifically under fatigue loading. There exists a growing need to better understand the effects of cutting parameters on residual stress and to identify more innovative methods to evaluate residual stress. Titanium has been widely used, but many of the same qualities that enhance titanium’s appeal for most applications also contribute to it being one of the most difficult to machine materials. High-speed cutting experiments were conducted on commercially pure (CP) titanium and the residual stress depth profile was analysed using energy dispersive diffraction (EDDI). The residual stress depth profile of CP Grade 4 titanium was then evaluated. Experimental results show that cutting speed and depth of cut have a significant effect on the residual stress profile. At a low cutting speed, the surface residual stresses are largely compressive, becoming less compressive with an increase in cutting speed. An increase in depth of cut also introduces more compressive residual stresses into the material.
- Full Text:
- Authors: Janse van Rensburg, N. , Madyira, D.M. , Laubscher, R.F. , Oosthuizen, G.A.
- Date: 2013
- Subjects: Residual stress , Energy dispersive diffraction , Titanium - Mechanical properties
- Type: Article
- Identifier: uj:4948 , http://hdl.handle.net/10210/13048
- Description: Residual stress is well-known to influence the mechanical properties of machined components. The magnitude and distribution of these stresses are critical to determine the component’s life, specifically under fatigue loading. There exists a growing need to better understand the effects of cutting parameters on residual stress and to identify more innovative methods to evaluate residual stress. Titanium has been widely used, but many of the same qualities that enhance titanium’s appeal for most applications also contribute to it being one of the most difficult to machine materials. High-speed cutting experiments were conducted on commercially pure (CP) titanium and the residual stress depth profile was analysed using energy dispersive diffraction (EDDI). The residual stress depth profile of CP Grade 4 titanium was then evaluated. Experimental results show that cutting speed and depth of cut have a significant effect on the residual stress profile. At a low cutting speed, the surface residual stresses are largely compressive, becoming less compressive with an increase in cutting speed. An increase in depth of cut also introduces more compressive residual stresses into the material.
- Full Text:
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