Simulation Studies and Evolution of Mechanical Properties of AA6061 Subjected to RCS

Article Preview

Abstract:

AA6061 alloy was selected as starting material, as this alloy play vital role in aerospace, automotive and naval applications. To enhance mechanical properties and study the structural correlation of AA6061 using one of the promising SPD (Severe Plastic Deformation) technique. In RCS (Repetitive Corrugation and Straightening), repetitive bending and shearing stresses act alternatively on the specimen. The die models and work piece were designed using Creo parametric 2.0 and imported to AFDEX-2014 (Adviser metal Forming Design Expert) for simulation studies. AA6061 was subjected to four passes (8 stages) of RCS. Effective strain observed in AA6061 alloy was 2.389 and strain rate increased during corrugation and less during straightening stages. The theoretical effective strain was 2.65.The experimental effective strain was validated and found to be nearly approximately 92% of the theoretical result. Further, mechanical properties like tensile strength and microhardness increased to 1.5 to 2 times in AA6061 alloy after eight passes of RCS. Keywords: AA6061, RCS, SPD, Microhardness, Tensile strength

You might also be interested in these eBooks

Info:

Periodical:

Pages:

142-151

Citation:

Online since:

June 2018

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2018 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

[1] Balasundar, M.S. Rao, T.Raghu Equal channel angular pressing die to extrude a variety of materials,, Materials & Design, Vol. 30, Issue 4, April 2009, 1050-1059.

DOI: 10.1016/j.matdes.2008.06.057

Google Scholar

[2] M.S. Ghazani, A. Vajd, B.Mosadeg 3D finite element study of temperature variations during equal channel angular pressing, Journal of Advanced Materials and Processing, Volume 2, Issue 1, Winter 2014, 47-54.

Google Scholar

[3] A. Rosochowski, L. Olejnik Finite element analysis of two-turn Incremental ECAP,, International Journal of Material Forming, April 2008, Volume 1, Supplement 1, 483-486.

DOI: 10.1007/s12289-008-0108-y

Google Scholar

[4] C.Huvier, E. Conforto, H.E. Alami, D. Delafosse, and X. Feaugas. IOP Conf. Series: Materials Science and Engineering., (2009), 1-6.

DOI: 10.1088/1757-899x/3/1/012012

Google Scholar

[5] Muralidhar, Avvari, S. Narendranath, H.Shivananda Nayaka. Effect to equal channel angular pressing on AZ31 wrought magnesium alloys,. Journal of magnesium and alloys1, no. 4(2013): 336-340.

DOI: 10.1016/j.jma.2013.11.007

Google Scholar

[6] G. Raab, The innovation potential of ECAP techniques of severe plastic deformation, IOP Conference Series: Materials Science and Engineering, 63, 01 (2009).

DOI: 10.1088/1757-899x/63/1/012009

Google Scholar

[7] KO Sanusi , OD Makinde , GJ Oliver. Equal channel angular pressing technique for the formation of ultrafine grained structures,. S Afr. J. Sci. (2012)108 (9/10), 212-217.

DOI: 10.4102/sajs.v108i9/10.212

Google Scholar

[8] G.Faraji, F. Reshadi, and M. Baniasadia. A new approach for achieving excellent strain homogeneity in tubular channel angular pressing (TCAP) process., Journal of Advanced Materials and Processing 2, no. 1 (2014): 3-12.

Google Scholar

[9] G. Faraji , M. M. Mashhadi A. F. Dizadji M. Hamdi A numerical and experimental study on tubular channel angular pressing (TCAP) process,, Journal of Mechanical Science and Technology, November 2012, Volume 26, Issue 11, 3463-3468.

DOI: 10.1007/s12206-012-0874-9

Google Scholar

[10] G.Faraji, M.M. Mashhadi, S.H. Joo, H.S. Kim the role of friction in tubular channel angular pressing, Rev.Adv. Mater. Sci. 31 (2012) 12-18.

Google Scholar

[11] M. Jahedi, M.H. Paydar Three-dimensional finite element analysis of torsion extrusion (TE) as an SPD process., Materials Science and Engineering: A 528, no. 29 (2011), 8742-8749.

DOI: 10.1016/j.msea.2011.08.055

Google Scholar

[12] Figueiredo, B Roberto , Gustavo CV de Faria, P.R. Cetlin, and T.G. Langdon. Three-dimensional analysis of plastic flow during high-pressure torsion., Journal of Materials Science 48, no. 13 (2013), 4524-4532.

DOI: 10.1007/s10853-012-6979-9

Google Scholar

[13] DJ Lee, EY Yoon, SH Lee, SY Rang finite element analysis for compression behavior of high pressure torsion processing, Rev. Adv. Mater. Sci. 31 (2012) 25-30.

Google Scholar

[14] Todaka, Yoshikazu, Minoru Umemoto, Ayumi Yamazaki, Jun Sasaki and koichi Tsuchiya. Influence of high-pressure torsion straining conditions on microstructure evolution in commercial purity aluminum., Materials transactions 49, no. 1 (2008): 7-15.

DOI: 10.2320/matertrans.me200713

Google Scholar

[15] D.C. Patil S.A. Kori , K.Venkateswarlu, G. Das , S.N. Alhajeri, T. G. Langdon Using ball indentation to determine the mechanical properties of an Al-7475 alloy processed by high-pressure torsion, Journal of Materials Science, July 2013, Volume 48, Issue 13, 4773-4779.

DOI: 10.1007/s10853-012-6969-y

Google Scholar

[16] J Zhang, N Gao, MJ Starink Al-Mg-Cu based alloys and pure Al processed by high pressure torsion: The influence of alloying additions on strengthening, Materials Science and Engineering: A,Volume 527, Issue 15, 15 June 2010, 3472-3479.

DOI: 10.1016/j.msea.2010.02.016

Google Scholar

[17] I. Balasundar , T. Raghu On the die design for Repetitive Upsetting - Extrusion (RUE) process, International Journal of Material Forming June 2013, Volume 6, Issue 2, 289-301.

DOI: 10.1007/s12289-011-1086-z

Google Scholar

[18] T. Raghu, I. Balasundar, Severe Plastic Deformation (SPD) Using a Combination of Upsetting and Extrusion, Journal of Metallurgical Engineering (ME) Vol. 2 Issue 4, 2013, 130-139.

Google Scholar

[19] Balasundar, I., K. R. Ravi, and T. Raghu. Strain softening in oxygen free high conductivity (OFHC) copper subjected to repetitive upsetting-extrusion (RUE) process., Materials Science and Engineering: A 583 (2013), 114-122.

DOI: 10.1016/j.msea.2013.06.029

Google Scholar

[20] M.S. Ghazani, A,Vajd , Finite Element Analysis of the Groove Pressing of Aluminum Alloy,Modeling and Numerical Simulation of Material Science, (2014),4, 32-36.

DOI: 10.4236/mnsms.2014.41006

Google Scholar

[21] N. SOLHJOEI, A. R.Varposhty , H. Mokhtarian , A. Manian a comparative study to evaluate the efficiency of rcs and cgp processes, Indian J. Sci.Res.l(2): 563-572, (2014).

Google Scholar

[22] A Shirdel, A Khajeh, M M Moshksar, Experimental and finite element investigation of semi-constrained groove pressing process,, Materials & Design,Volume 31, Issue 2, February 2010, Pages 946-950.

DOI: 10.1016/j.matdes.2009.07.035

Google Scholar

[23] N.Rangaraju, T.Raghuram, B.VamsiKrishna , K.PrasadRao ,P.Venugopal Effect of cryo-rolling and annealing on microstructure and properties of commercially pure aluminum, Materials Science and Engineering: A Volume 398, Issues 1-2, 25 May 2005, 246-251.

DOI: 10.1016/j.msea.2005.03.026

Google Scholar

[24] P. Nageswara, R.D Singh. R Jayaganthan Mechanical properties and micro structural evolution of Al 6061 alloy processed by multidirectional forging at liquid nitrogen temperature, Materials & Design (1980-2015) Volume 56, April 2014, 97-104.

DOI: 10.1016/j.matdes.2013.10.045

Google Scholar

[25] K Nakamural, K Neishil, K Kaneko, M Nakagaki, Z Horita Development of Severe Torsion Straining Process for Rapid Continuous Grain Refinement,, materials transactions, Vol. 45 (2004) No. 12 , 3338-3342.

DOI: 10.2320/matertrans.45.3338

Google Scholar