Effect of Hexagonal Boron Nitrate on Microstructure and Mechanical Behavior of Al7075 Metal Matrix Composite Producing by Stir Casting Technique

Document Type : Original Article

Authors

1 Department of Mechanical Engineering, Malnad College of Engineering, VTU, India

2 Department of Automobile Engineering, Malnad College of Engineering, VTU, India

3 Department of Mechanical Engineering, Rajeev institute of Technology, VTU, India

Abstract

Al7075 alloy reinforced with h-Boron Nitrate (BN) composites were processed by stir casting technique. The produced composite was subjected to microstructural studies using OLYMPUS -BX51M, tensile, hardness, density and wear tests. Tensile strength and hardness were found to increase by 12.8% and 20% respectively due to increased dislocation density with the addition of reinforcement. Microstructure showed grain refinement with reinforcement addition and reinforcement acts as nucleating sites with an approximately uniform distribution of reinforcements. Wear test was conducted with different loads 10, 20 and 30N for a sliding distance of 1500 m. Wear mass loss of composites showed improved wear resistance with variation in reinforcements. Worn surfaces were examined using SEM, which showed the presence of delamination, plough and debris on the surface. Due to the addition of low-density h-BN, the density of composites decreases with increase in reinforcement content.

Keywords


1. Kaushik, N. and Singhal, S., “Experimental investigation on
microstructural and mechanical behavior of friction stir welded
aluminium matrix composite”, International Journal of
Engineering-Transactions A: Basics, Vol. 32, No. 1, (2019),
162-170.
2. Bhushan, R.K., Kumar, S., and Das, S., “Fabrication and
characterization of 7075 Al alloy reinforced with SiC
particulates”, The International Journal of Advanced
Manufacturing Technology, Vol. 65, No. 5-8, (2013), 611-624.
3. Rosso, M., “Ceramic and metal matrix composites: Route and
Properties”, Journal of Mater Processing Technology, Vol. 175,
No. 1, (2006), 364-375.
4. Kuldeep, B., Ravikumar, K.P., Pradeep, S., and Gopi, K.R.,
“Effect of boron nitride and zirconium dioxide on mechanical
behavior of Al7075 metal matrix hybrid composite”, Materials
Research Express, Vol. 6, No. 3, (2018).
5. Baradeswaran, A., and Perumal, A.E., “Study on mechanical and
wear properties of Al 7075/Al
2
O
3
/graphite hybrid composites”,
Composites Part B: Engineering, Vol. 56, (2014), 464-471.
6. Lakshmipathy, J., and Kulendran, B., “Reciprocating wear
behavior of 7075Al/SiC in comparison with 6061Al/Al2O3
composites”, International Journal of Refractory Metals and
Hard Materials, Vol. 46, (2014), 137-144.
7. Chen, C., Guo, L., Luo, J., Hao, J., Guo, Z., and Volinsky, A.A.,
“Aluminum powder size and microstructure effects on properties
of boron nitride reinforced aluminum matrix composites
fabricated by semi-solid powder metallurgy”, Materials Science
and Engineering: A, Vol. 646, (2015), 306-314.
8. Reddy, M.P, Manakari, V., Parande, G., Ubaid, F., Shakoor, R.A.,
Mohamed, A.M., and Gupta, M., “Enhancing compressive,
tensile, thermal and damping response of pure Al using BN
nanoparticles”, Journal of Alloys and Compounds, Vol. 762,
(2018), 398-408.
9. Imran, M., Khan, A.A., Megeri, S., and Sadik, S., “Study of
hardness and tensile strength of Aluminium-7075 percentage varying reinforced with graphite and bagasse-ash composites”,
Resource-Efficient Technologies, Vol. 2, No. 2, (2016), 81-88.
10. Dursun, T., and Soutis, C., “Recent developments in advanced
aircraft aluminium alloys”, Materials & Design, Vol. 56, (2014),
862-871.
11. Podgornik, B., Kosec, T., Kocijan, A., and Donik, C.,
“Tribological behaviour and lubrication performance of
hexagonal boron nitride (h-BN) as a replacement for graphite in
aluminium forming”, Tribology International, Vol. 81, (2015),
267-275.
12. Verma, N., and Vettivel, S.C., “Characterization and
experimental analysis of boron carbide and rice husk ash
reinforced AA7075 aluminium alloy hybrid composite”, Journal
of Alloys and Compounds, Vol. 741, (2018), 981-998.
13. Ezatpour, H.R., Parizi, M.T., Sajjadi, S.A., Ebrahimi, G.R., and
Chaichi, A., “Microstructure, mechanical analysis and optimal
selection of 7075 aluminum alloy based composite reinforced
with alumina nanoparticles”, Materials Chemistry and Physics,
Vol. 178, (2016), 119-127.
14. Kok, M., and Ozdin, K., “Wear resistance of aluminum alloy and
its composites reinforced by Al
2
O
3
 particles”, Journal of
Material Processing Technology, Vol. 183, (2007), 301–309.
15. Raturi, A., Mer, K.K., and Pant, P.K., “Synthesis and
characterization of mechanical, tribological and micro structural
behaviour of Al 7075 matrix reinforced with nano Al
2
O
3

particles”, Materials Today: Proceedings, Vol. 4, No. 2, (2017),
2645-2658.
16. Rahimian, M., Parvin, N.,and Ehsani, N., “Investigation of
particle size and amount of alumina on microstructure and
mechanical properties of Al matrix composite made by powder
metallurgy”, Material Science Engineering A, Vol. 527, (2010),
1031–1038.
17. Xiu, Z., Yang, W., Dong, R., Hussain, M., Jiang, L., Liu, Y., and
Wu, G., “Microstructure and mechanical properties of 45 vol.%
SiCp/7075Al composite”, Journal of Materials Science &
Technology, Vol. 31, No. 9, (2015), 930-934.
18. Kumar, K.R., Pridhar, T., and Balaji, V.S., “Mechanical
properties and characterization of zirconium oxide (ZrO
2
) and
coconut shell ash (CSA) reinforced aluminium (Al 6082) matrix
hybrid composite”, Journal of Alloys and Compounds, Vol. 765,
(2018), 171-179.
19. Sun, Y, “The Effect of Ti Addition and Aging on Wear Behavior
of AlMgSi Alloys Reinforced with In Situ Al3Ti Particles”,
Journal of Materials Engineering and Performance, Vol.
22, No. 1, (2013), 162-169.
20. Gomez-del Río, T., Rico, A., Garrido, M.A., Poza, P., and
Rodríguez, J., “Temperature and velocity transitions in dry sliding
wear of Al–Li/SiC composites”, Wear, Vol. 268, No. 5-6, (2010),
700-707.
21. Rosenberger, M.R., Florlerer, E., and Schvezov, C.E., “Wear
behavior of AA1060 reinforced with alumina under different
loads”, Wear, Vol. 266, (2009), 356–359.
22. Lahiri, D., Singh, V., Li, L.H., Xing, T., Seal, S., Chen, Y., and
Agarwal, A., “Insight into reactions and interface between boron
nitride nanotube and aluminum”, Journal of Materials Research,
Vol. 27, No. 21, (2012), 2760-2770.