Parameter Analysis and optimization of equal channel angular pressing extrusion for titanium alloy using Taguchi design of experiments method

Khademizadeh, H.; Eftekhari, S.A.; Abtahi Froushani, S.H.

Parameter Analysis and optimization of equal channel angular pressing extrusion for titanium alloy using Taguchi design of experiments method

Document Type : Persian

Authors

¹ Assistant Prof., Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran

² MSc Student, Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran

Abstract

In this paper the influence of different parameters on equal channel angular pressing (EADAP) of titanium alloy is investigated. In the first step the most important parameters are selected, and then a table of experiments is designed using Taguchi method. After designing the table of experiments, all of the experiments are simulated using Abacus software and the results are optimized using Taguchi method. The results shows that the optimum levels for ECAP method between the implemented experiments of titanium are 120 degrees for die channel, ambient temperature and 2 passes.

Keywords

References

[1]Sanusi K.O., Makind O.D., Oliver G.J., Equal channel angular pressing technique for the formation of ultra-fine grained structures,South African Journal of Science, Vol. 108, No.9-10, 2012, pp.1-7.

[2]Zhao X., et al., The processing of pure titanium through multiple passes of ECAP at room temperature. Materials Science and EngineeringA,Vol. 527, No.23, 2010, pp. 6335-6339.

[3]Zhang Y., Structure and mechanical properties of commercial purity titanium processed by ECAP at room temperature, Materials Science and Engineering: A, Vol. 528, No.25–26, 2011, pp. 7708-7714.

[4]Czerwinski A., et al, The Influence of Temporary Hydrogenation on Ecap Formability and Low Cycle Fatigue Life of Cp Titanium, Journal of Alloys and Compounds, Vol. 509, 2011.

[5]عباسی ع.، بررسی تولید مواد با استحکام بالا در فرآیند فشرده سازی در کانال های هم مقطع زاویه دار به کمک شبیه سازی سه بعدی، فصلنامه فرایندهای نوین ساخت و تولید، شماره 4، 1389،ص 6.

[6]Zhao, X., Processing of commercial purity titanium by ECAP using a 90 degrees die at room temperature, Materials Science and Engineering A,Vol. 607, No.10, 2014, pp. 904-907.

[7]ابراهیمی، فرآیند اکستروژن در کانالهای هم مقطع زاویه دار، شبیه سازی فرآیند وبررسی تاثیر نوع مسیر در کرنش و یکنواختی آن, کنفرانسملی مهندسی ساخت و تولید دانشگاه آزاد اسلامی واحد نجف آباد1386: دانشگاه آزاد اسلامی واحد نجف آباد.

[8]Valiev R.Z., Langdon T.G., Principles of equal-channel angular pressing as a processing tool for grain refinement. Progress in Materials Science, Vol. 51, No. 7, 2006, pp. 881-981.

[9]Sordi V.L., Ferrante M., Kawasaki M., Langdon T.G.,Microstructure and tensile strength of grade 2 titanium processed by equal-channel angular pressing and by rolling, Journal of Materials Science, Vol. 47, No.22, 2012, pp.7870-7876.

[10]Figueiredo R.B., Cetlin P.R., Langdon T.G., The processing of difficult-to-work alloys by ECAP with an emphasis on magnesium alloys. Acta Materialia,. Vol. 55, No.14, 2007, pp. 4769-4779.

[11]Yamashita A., et al., Influence of pressing temperature on microstructural development in equal-channel angularpressing. Materials Science and Engineering A, Vol. 287, No.1, 2000, pp.100-106.

[12]Stolyarov V.V., et al., A two step SPD processing of ultrafine-grained titanium. Nanostructured Materials, Vol. 11, No.7, 1999, pp. 947-954.

[13]Fan G.D., et al., Effect of heat treatment on internal friction in ECAP processed commercial pure Mg. Journal of Alloysand Compounds, Vol. 549, No. 10, , 2013, pp. 38-45.

[14]Chuvil’deev V.N., et al., Low-temperature superplasticity and internal friction in microcrystalline Mg alloys processed by ECAP, Scripta Materialia, Vol. 50, No.6, 2004, pp. 861-865.

[15]Kang F., et al., Finite elementanalysis of the effect of back pressure during equal channel angular pressing. Journal of Materials Science, Vol. 42, No.5, 2007, pp. 1491-1500.

[16]Djavanroodi F., EbrahimiM., Effect of die channel angle, friction and back pressure in the equal channel angular pressing using 3D finite element simulation, Materials Science and EngineeringA, Vol. 527, No.4–5, 2010, pp. 1230-1235.

[17]Ribbe J., et al., Effect of back pressure during equal-channel angular pressing on deformation-induced porosity in copper, Scripta Materialia,. Vol. 68, No.12, 2013, pp. 925-928.

[18]Chung M.-K., et al., Effect of the number of ECAP pass time on the electrochemical properties of 1050 Al alloys, Materials Science and Engineering A,. Vol. 366, No.2, 2004, pp. 282-291.

[19]Kim I., et al., Effects of equalchannel angular pressing temperature on deformation structures of pure Ti, Materials Science and Engineering: A,Vol. 342, No.1–2, 2003, pp. 302-310.

[20]Kim I., et al., Deformation structures of pure Ti produced by equal channel angular pressing, Scripta Materialia,Vol. 45, No.5, 2001, pp. 575-580.

[21]Chen F.K., Stamping formability of pure titanium sheets, Journal of Materials Processing Technology, Vol. 170, 2005, pp. 181-186.