Investigation of mechanical properties of friction and laser welded Ti-6Al-4V rods.
- Authors: Tlale, Thabo , Mashinini, P. M. , Mukhawana, D. M.
- Date: 2021
- Subjects: Ti6AI-4V , Tensile strength , Microhardness
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/485753 , uj:44163 , DOI: 10.1109/ICMIMT52186.2021.9476153 , Citation: T. D. Tlale, P. M. Mashinini and D. M. Mukhawana, "Investigation of Mechanical Properties of Friction and Laser Welded Ti-6Al-4V rods," 2021 IEEE 12th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT), 2021, pp. 158-164, doi: 10.1109/ICMIMT52186.2021.9476153.
- Description: Abstract: Please refer to full text to view abstract.
- Full Text:
Predicting the influence of process parameters on tensile strength of AA6061/TiC aluminum matrix composites produced using stir casting
- Authors: Moses, J. Jebeen , Dinaharan, I. , Sekhar, S. Joseph
- Date: 2016
- Subjects: Aluminum matrix composites , Stir casting , Titanium carbide , Tensile strength
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/93246 , uj:20322 , Citation: Moses, J. J., Dinaharan, I. & Sekhar, S. J. 2016. Predicting the influence of process parameters on tensile strength of AA6061/TiC aluminum matrix composites produced using stir casting.
- Description: Abstract: Stir casting is an economical method to produce aluminum matrix composites (AMCs). In this work, stir casting was used to produce AA6061/15wt. % TiC AMCs. An empirical relationship was developed to predict the effect of stir casting parameters on the ultimate tensile strength (UTS) of AA6061/TiC AMCs. A central composite rotatable design consisting of four factors and five levels was used to minimize the number of experiments i.e. castings. The factors considered were stirrer speed, stirring time, blade angle and casting temperature. The effect of those factors on the UTS of AA6061/TiC AMCs was derived using the developed empirical relationship and elucidated using microstructural characterization. Each factor significantly influenced the UTS. A higher or lower values of those factors resulted in poor tensile strength. The variation in the UTS was attributed to porosity content, cluster formation, segregation of TiC particles at the grain boundaries and 2 homogenous distribution in the aluminum matrix. The UTS was high when the porosity content was low and the distribution was homogenous. The present work concludes that a careful selection and control of stir casting parameters are necessary to reduce porosity content and obtain uniform distribution to improve the load bearing capacity of the AA6061/TiC AMCs.
- Full Text:
Tensile properties of long untreated and alkali treated Napier grass fiber strands/epoxy composites
- Authors: Kommula, Venkata Parasuram , Kanchireddy, Obi Reddy , Shukla, Mukul , Marwala, Tshilidzi
- Date: 2013
- Subjects: Tensile strength , Alkali treatment , Napier Grass fibers
- Type: Article
- Identifier: uj:4856 , http://hdl.handle.net/10210/12532
- Description: Napier grass fiber strands were extracted using the combined mechanical and water retting process. The extracted fiber strands were treated with various proportions (5, 10 and 15% w/v) of NaOH solution to improve their surface morphology and bonding with the resin. This study investigates the Tensile properties of composites made by reinforcing alkali treated, long Napier grass fiber strands in to epoxy resin with different orientations (0º). The composites were prepared with 0, 5, 10, and 15% of alkali treatment and with a fiber loading (weight %) of 10, 20, and 30%. The effect of alkali treatment, orientation and fiber loading on the tensile strength of the composites was analyzed using universal testing machine. Quantitative results from this study will be useful for more accurate design of Napier grass fiber strand reinforced composite materials for possible automotive applications.
- Full Text: