Welcome to Materials Science and Metallurgy Engineering

Materials Science and Metallurgy Engineering is a peer-reviewed, open access journal that provides rapid publication of articles in all areas of materials science and metallurgy engineering. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of materials science and metallurgy engineering.

ISSN (Print): 2373-3470

ISSN (Online): 2373-3489

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Website: http://www.sciepub.com/journal/MSME

   

Article

Enhancement of Mechanical Properties of AA 6351 Using Equal Channel Angular Extrusion (ECAE)

1Department of Mechanical engineering, Wollo University, South wollo, Ethiopia

2Department of Mechanical engineering, Bannari Amman Institute of Technology, Sathyamangalam, India


Materials Science and Metallurgy Engineering. 2014, 2(2), 26-30
doi: 10.12691/msme-2-2-3
Copyright © 2014 Science and Education Publishing

Cite this paper:
Raja Thiyagarajan, A. Gopinath. Enhancement of Mechanical Properties of AA 6351 Using Equal Channel Angular Extrusion (ECAE). Materials Science and Metallurgy Engineering. 2014; 2(2):26-30. doi: 10.12691/msme-2-2-3.

Correspondence to: Raja  Thiyagarajan, Department of Mechanical engineering, Wollo University, South wollo, Ethiopia. Email: rajaktraja@gmail.com

Abstract

The Equal Channel Angular Extrusion (ECAE) process is a promising technique for imparting large plastic deformation to materials without a resultant decrease in cross-sectional area. The die consists of two channels of equal cross section intersecting at an angle of 110°C. The work piece is placed in one channel and extruded into the other using a punch. In the present study, Influence of equal channel angular extrusion on room temperature, the mechanical properties of Aluminum Alloy AA 6351 alloy was investigated. The results show that, the mechanical properties of Aluminum AA 6351alloy, such as yield strength, ultimate tensile strength and elongation, can be improved heavily by equal channel angular extrusion. Processing routes, processing temperature and extrusion passes have important influence on room temperature mechanical properties of processed Aluminum AA 6351alloy by equal channel angular extrusion. The mechanical properties such as yield strength and ultimate tensile strength can be enhanced when Aluminum AA 6351 alloy was processed by equal channel angular extrusion for single pass at route A at 303 K.

Keywords

References

[1]  Jong-Woo Park, Jin-Yoo Suh “Effect of Die Shape on the Deformation Behavior in Equal-Channel Angular Pressing” Metallurgical and materials transactions A, Volume 32A, Dec 2001. pg.3007.
 
[2]  Dr Hu Banghong “Numerical Analysis in Equal Channel Angular Extrusion of Nanostructured Light Alloys” Forming Technology Group, 2002.
 
[3]  Fuqian Yang, Aditi Saran, Kenji Okazaki “Finite element simulation of equal channel angular extrusion” Journal of Materials Processing Technology 166 (2005) ELSEVIER pg.71-78.
 
[4]  A.V. Nagasekhar, Yip Tick-Hon, H.P. Seow (2007) “Deformation behavior and strain homogeneity in equal channel angular extrusion/pressing” ELSEVIER, Journal of Materials Processing Technology 192–193 (2007) 449-452.
 
[5]  Seung Chae Yoon, Hyoung Seop Kim “Finite element analysis of the effect of the inner corner angle in equal channel angular pressing” ELSEVIER, Materials Science and Engineering A 490 (2008) 438-444.
 
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[6]  Langdon T G. The principles of grain refinement in equal-channel angular pressing [J]. Materials Science and Engineering A, 2007, 462: 3-11.
 
[7]  Reihanian M, Ebrahimi R, Moshksar M M, Terada D,Tsuji n. Microstructure quantification and correlation with flow stress of ultrafine grained commercially pure Al fabricated by equal channel angular pressing (ECAP) [J]. Materials Characterization, 2008, 59: 1312-1323.
 
[8]  Zhilyaev A P, Swisher D L, Oh-Ishi K, Langdon T G, Mcnelley t r. Microtexture and microstructure evolution during processing of pure aluminum by repetitive ECAP [J]. Materials Science and Engineering A, 2006, 429: 137-148.
 
[9]  Chen Y B, Li Y L, He L Z, Lu C, Ding H, Li Q Y. The influence of cryoECAP on microstructure and property of commercial pure aluminium [J]. Materials Letters, 2008, 62: 2821-2824.
 
[10]  Sklenicka V, Dvorak J, Kral P, Stonawska Z, Svoboda m. Creep processes in pure aluminium processed by equal-channel angular pressing [J]. Materials Science and Engineering A, 2005, 410/411: 408-412.
 
[11]  Fang D R, Duan Q Q, Zhao N Q, Li J J, Wu S D, Zhang Z F. Tensile properties and fracture mechanism of Al-Mg alloy subjected to equal channel angular pressing [J]. Materials Science and Engineering A, 2007, 459: 137-144.
 
[12]  Nagarajan D, Chakkingal U, Venugopal P. Influence of cold extrusion on the microstructure and mechanical properties of an aluminium alloy previously subjected to equal channel angular pressing [J]. Journal of Materials Processing Technology, 2007, 182: 363-368.
 
[13]  Del Valle J A, Carreno F, Ruano O A.Influence of texture and grain size on work hardening and ductility in magnesium-based alloys processed by ECAP and rolling [J]. Acta Materialia, 2006, 54: 4247-4259.
 
[14]  Saravanan M, Pillai R M, Ravi K R, Pai B C, Brahmakumar M. Development of ultrafine grain aluminium-graphite metal matrix composite by equal channel angular pressing [J]. Composites Science and Technology, 2007, 67: 1275-1279.
 
[15]  Sabirov I, Kolednik O, Valiev R Z, Pippan R. Equal channel angular pressing of metal matrix composites: Effect on particle distribution and fracture toughness [J]. Acta Materialia, 2005.
 
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Article

The Effect of Holding Time on the Hardness of Case Hardened Mild Steel

1Department of Mechanical Engineering, University of Uyo, PMB 1017 Uyo, Akwaibom State-Nigeria


Materials Science and Metallurgy Engineering. 2014, 2(3), 31-34
doi: 10.12691/msme-2-3-1
Copyright © 2014 Science and Education Publishing

Cite this paper:
Ihom P. Aondona, Aniekan Offiong. The Effect of Holding Time on the Hardness of Case Hardened Mild Steel. Materials Science and Metallurgy Engineering. 2014; 2(3):31-34. doi: 10.12691/msme-2-3-1.

Correspondence to: Ihom  P. Aondona, Department of Mechanical Engineering, University of Uyo, PMB 1017 Uyo, Akwaibom State-Nigeria. Email: draondonaphilip@gmail.com

Abstract

The study “the effect of holding time on the hardness of mild steel case hardened with carburizing material energized by cow-bone” has been x-rayed. The mild steel specimens used for the study were carburized in the furnace at 900C at various holding times of 2 hrs, 4 hrs, 6 hrs, and 8 hrs, using 65% charcoal / 35% cow-bone as carburizing material. Hardness values were obtained using Vickers Micro-hardness Tester Machine, from the hardness values, hardness profiles were plotted. The result of the study clearly showed that the hardness of the carburized steel increased with increase in holding time. The hardness profile results were higher for higher holding time (surface hardness: 830 Hv for 2 hrs, 850 Hv for 4 hrs, 900 Hv for 6 hrs and 1000 Hv for 8 hrs) and also the plot of the profile for 8 hrs holding time was higher than that of 6 hrs, and that of 6 hrs was higher than that of 4 hrs, and in that order. This clearly showed that holding time has effect on the hardness of case hardened steel.

Keywords

References

[1]  Ihom, A.P. Case Hardening of Mild Steeling using Cow-bones, B.ENG Degree Project Submitted to the Department of Materials and Metallurgical Engineering, University of Jos, 1991, 1-35.
 
[2]  Ihom, A.P. heat treatment parameters control and their effect on quality, in house seminar presented at National Metallurgical Development Centre, Jos, 2002, 1-20.
 
[3]  Aramide, F.O., Simeon A. I., Isiaka O.O. and Joseph O. B. Pack Carburization of Mild Steel, using Pulverized Bone as Carburize Optimizing Process Parameters, Leonardo Electronic Journal of Practices and Technologies ISSN 1583-1078 16, 2010, 1-12.
 
[4]   Ihom, A.P., Yaro, S.A., Aigbodion, V.S. The Effect of Carburization on the Corrosion Resistance of Mild Steel in Four Different Media, Journal of Corrosion Science and Technology, 3, 2005, 18-21.
 
[5]  Shragger, A.M., Elementary Metallurgy and Metallography, 2ND Edition, Dover Publications New York, 1961, p 175-176.
 
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[6]  Ihom, A.P., Nyior, G.B., and Ambayin, M. Surface Hardness Improvement of Mild Carbon Steel using Arecaceae Waste Flower Droppings, the Pacific Journal of Science and Technology 13, 1, 2012, 133-138.
 
[7]  ASM Committee on Gas Carburizing American Society for Metals, USA, 1977, 1-46.
 
[8]  Higgins, R.A. Properties of Engineering Materials 6th edition Hodder and Stoughton Educational Great Britain, 1983, 199-200.
 
[9]  Ihom, A,P. and Nyior, G.B., Suleiman, M.U. and Ibrahim, G.Z. Improving Surface Hardness of Steel using Rice Husk Waste, Nigerian Journal of Tropical Engineering, 1, 2, 2011, 107-115.
 
[10]  Ihom, A.P., Nyior, G.B., Alabi, O.O., Segun, S, Nor, I.J. and Ogbodo, J.N. The Potentials of Waste Organic Materials for Surface Hardness Improvement of Mild Steel, International Journal of Scientific and Engineering Research, 3, 11, 2012, 1-20.
 
[11]  Ihom, A.P., Nyior, G.B., Nor, I.J., Ogbodo, N.J. Investigation of Egg Shell Waste as an Enhancer in the Carburisation of Mild Steel, American Journal of Material Science and Engineering, 1, 2, 2013, 29-33.
 
[12]  Ihom, A.P., Nor, J.I., Alabi, O.O., and Usman, A.W. Recent Trends and Developments in Surface Hardening Technology: A Focus on New Ceramics for Surface Modification in Industry, International Journal of Science and Engineering Research, 3, 11, 2012, 1-27.
 
[13]  Okongwu, D.A. Assessment of the Efficacy of Some Carbonate Minerals as Energizers in Pack Carburization of Mild Steel, J. NSE, 1989, 30-35.
 
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Article

Structural Modification of Hypereutectic Al-16.5mass%Si Alloy by Thermo-Mechanical Treatment with ECAP

1Department of Technological Studies of Hydroextrusion Processes, Donetsk O.O.Galkin Institute for Physics and Engineering, National Academy of Sciences of Ukraine, Donetsk, Ukraine

2Department of Constitution and Properties of Solid Solutions, G.V.Kurdyumov Institute for Metal Physics, National Academy of Sciences of Ukraine, Kyiv, Ukraine

3Department of magnetohydrodynamics, Physico-Technological Institute of Metals and Alloys, National Academy of Sciences of Ukraine, Kyiv, Ukraine


Materials Science and Metallurgy Engineering. 2014, 2(3), 35-40
doi: 10.12691/msme-2-3-2
Copyright © 2014 Science and Education Publishing

Cite this paper:
Victor Spuskanyuk, Alla Berezina, Victor Dubodelov, Oleksandr Davydenko, Vladyslav Fikssen, Kristina Sliva, Tetyana Monastyrska. Structural Modification of Hypereutectic Al-16.5mass%Si Alloy by Thermo-Mechanical Treatment with ECAP. Materials Science and Metallurgy Engineering. 2014; 2(3):35-40. doi: 10.12691/msme-2-3-2.

Correspondence to: Oleksandr  Davydenko, Department of Technological Studies of Hydroextrusion Processes, Donetsk O.O.Galkin Institute for Physics and Engineering, National Academy of Sciences of Ukraine, Donetsk, Ukraine. Email: dav76@ukr.net

Abstract

Evolution of the microstructure and mechanical properties of the hypereutectic Al-16.5mass%Si-3.77mass%Cu alloy by treatment in the liquid state by magnetohydrodynamic (MHD) and hydrodynamic (HD) methods, followed by processing in the solid state by equal channel angular pressing (ECAP) method and thermal treatment has been investigated. This alloy has in initial state a very low value of plasticity at room temperature. Optical microscopy technique was employed in order to determine the evolution of the microstructure after different operating conditions of ECAP and thermal treatments. It was demonstrated that it is possible to significantly improve mechanical properties of this alloy by means of combining a low number of ECAP passes after an adequate combination of MHD+HD processing and thermal treatments.

Keywords

References

[1]  Ma, A., Suzuki, K., Saito, N., Nishida, Y., Takagi, M., Shigematsu, I., Iwata, H. “Impact toughness of an ingot hypereutectic Al-23mass% Si alloy improved by rotary-die equal-channel angular pressing,” Mater. Sci. Eng. A, 399, 181-189, 2005.
 
[2]  Yoon, S. C., Hong, S. J., Hong, S. I., Kim, H. S., “Mechanical properties of equal channel angular pressed powder extrudates of a rapidly solidified hypereutectic Al-20 wt% Si alloy,” Mater. Sci. Eng. A, 449-451, 966-970, 2007.
 
[3]  Chuvildeev, V.N., Gryaznov, M.Yu., Kopylov, V.I., Sysoev, A.N., “Superplasticity of microcrystalline Al-Si alloys,” Physics Status Solid, Vestnik Nizhegorodski Univercity, 4, 42-48, 2010.
 
[4]  Dubodelov, V., Fikssen, V., Slazhniev, M., Goryuk, M., Skorobagatko, Yu., Berezina, A., Monastyrska, T., Davydenko, O., Spuskanyuk, V. “Improving of Al-Si alloys by their combined MHD and thermo-forced processing in liquid and solid states,” Magnetohydrodynamics, 48 (2), 379-386, 2012.
 
[5]  Berezina, A., Monastyrska, T., Dubodelov, V., Segida, O., Fikssen, V. “Effects of Melt Treatment in the Magnetodynamic Installation on the Structure of Al-Si Alloys,” Aluminum Alloys, ICAAII, DGM, v.1, pp. 470-476, 2008.
 
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[6]  Beloshenko, V., Spuskanyuk, V. “ECAE Methods of Structure Modification of Materials,” International Journal of Materials and Chemistry, 2(4), 145-150, 2012.
 
[7]  Berezina, A.L., Dubodelov, V.I., Monastyrska, T.O., Fikssen, V.N., Slaznev, M.A., Skorobagat'ko, Yu.P. “Impact of Magnetohydrodynamic Treatment of Cuprous Hypereutectic Silumins on Processes of Formation of Strengthening Nanoparticles During the Ageing,” Metallofizika i Noveishie Tekhnologii, 33 (5), 651-66, 2011.
 
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