Numerical investigation of strain distribution during cyclic expansion extrusion (CEE)

Journal of Advanced Materials and Processing

مقاله 5، دوره 3، شماره 2، تیر 2015، صفحه 35-48   

نوع مقاله: Research Paper

نویسندگان

Hamid Reza Torabi؛ M.M. Samandari؛ Ghader Faraji^* ؛ Abolfazl Masoumi

Department of Mechanical Engineering, Faculty of Eng. , University of Tehran, Tehran, Iran

چکیده

Strain distribution of Al 1100 was numerically investigated during cyclic expansion extrusion (CEE) process using finite element method (FEM). Die angle, corner fillet radius and die chamber diameter were considered as die parameters and friction factor and number of passes as process parameters. The effects of these parameters were investigated on the effective strain and strain homogeneity in CEE process. Results showed that the decrease of friction factor along with the increase of die angle, corner fillet radius and number of passes lead to more homogeneous strain distribution while chamber diameter has an optimal effect on the homogeneity. Material flow diagram of the deformation zone demonstrated that shear strains have a significant contribution to accumulated effective strain especially adjacent to the outer region of the sample. In comparison, in the central region of the CEE processed sample, normal strains exist as a dominant deformation route. Also, the results revealed that all the parameters except corner fillet radius (r) influence on the equivalent strain value.

کلیدواژه‌ها

Cyclic Expansion Extrusions (CEE)؛ Strain distribution؛ Deformation Zone (DZ)؛ Homogeneity

مراجع

1. Horita, Z., Nanomaterials by Severe Plastic Deformation. International Conference on Nanomaterials by Severe Plastic Deformation 2006: Materials Science Forum. 1050.
2. Rosochowski, A., Processing metals by severe plastic deformation. Solid State Phenomena, 101, 2004, pp. 13-22.
3. Rosochowski, A., L. Olejnik, and M. Richert, Metal forming technology for producing bulk nanostructured metals. Journal of Steel and Related Materials–Steel GRIPS, 2, 2004, pp. 35-44.
4. Valiev, R., et al., Producing bulk ultrafine-grained materials by severe plastic deformation.JOM, 58(4), 2006, pp. 33-39.
5. Azushima, A., et al., Severe plastic deformation (SPD) processes for metals.CIRP Annals - Manufacturing Technology, 57(2), 2008, pp. 716-735.
6. Babaei, A. and M. M. Mashhadi, Characterization of ultrafine-grained aluminum tubes processed by Tube Cyclic Extrusion–Compression (TCEC). Materials Characterization, 95(0), 2014, pp. 118-128.
7. Valiev, R. Z. and T. G. Langdon, Principles of equal-channel angular pressing as a processing tool for grain refinement. Progress in Materials Science, 51(7), 2006, pp. 881-981.
8. Huang, X., et al., Microstructural evolution during accumulative roll-bonding of commercial purity aluminum. Materials Science and Engineering: A, 340(1–2), 2003, pp. 265-271.
9. Saito, Y., et al., Ultra-fine grained bulk aluminum produced by accumulative roll-bonding (ARB) process. Scripta Materialia, 39(9), 1998, pp. 1221-1227.
10. 10. Zhilyaev, A. P., et al., Experimental parameters influencing grain refinement and microstructural evolution during high-pressure torsion. Acta Materialia, 51(3), 2003, pp. 753-765.
11. 11. Zhilyaev, A. P. and T. G. Langdon, Using high-pressure torsion for metal processing: Fundamentals and applications. Progress in Materials Science, 53(6), 2008, pp. 893-979.
12. 12. Richert, M., Q. Liu, and N. Hansen, Microstructural evolution over a large strain range in aluminium deformed by cyclic-extrusion–compression. Materials Science and Engineering: A, 260(1), 1999, pp. 275-283.
13. 13. Zhang, J. A new bulk deformation method–Cyclic extrusion. in Materials Science Forum. 2007. Trans Tech Publ.
14. 14. Faraji, G., et al., TEM analysis and determination of dislocation densities in nanostructured copper tube produced via parallel tubular channel angular pressing process. Materials Science and Engineering: A, 563(0), 2013, pp. 193-198.
15. 15. Faraji, G. and M. Mousavi Mashhadia, Plastic deformation analysis in parallel tubular channel angular pressing (PTCAP). Journal of Advanced Materials and Processing, 1(4), 2013, pp. 23-32.
16. 16. Pardis, N., et al., Cyclic expansion-extrusion (CEE): A modified counterpart of cyclic extrusion-compression (CEC). Materials Science and Engineering: A, 528(25–26), 2011, pp. 7537-7540.
17. 17. Babaei, A., M. M. Mashhadi, and H. Jafarzadeh, Tube cyclic expansion-extrusion (TCEE) as a novel severe plastic deformation method for cylindrical tubes. Journal of Materials Science, 49(8), 2014, pp. 3158-3165.
18. 18. Pardis, N., et al., Development of new routes of severe plastic deformation through cyclic expansion–extrusion process. Materials Science and Engineering: A, 613(0), 2014, pp. 357-364.
19. 19. Lin, J.-b., et al., Finite element analysis of strain distribution in ZK60 Mg alloy during cyclic extrusion and compression. Transactions of Nonferrous Metals Society of China, 22(8), 2012, pp. 1902-1906.
20. 20. Lin, J., et al., Study on deformation behavior and strain homogeneity during cyclic extrusion and compression. Journal of Materials Science, 43(21), 2008, pp. 6920-6924.
21. 21. Rosochowski, A., R. Rodiet, and P. Lipinski, Finite element simulation of cyclic extrusion-compression. Metal Forming, 2000, pp. 253-259.
22. 22. Azimi, A., et al., Mechanical properties and microstructural evolution during multi-pass ECAR of Al 1100–O alloy. Materials & Design, 42(0), 2012, pp. 388-394.
23. 23. Faraji, G., et al., The role of friction in tubular channel angular pressing. Rev. Adv. Mater. Sci, 31, 2012, pp. 12-18.
24. 24. Lin, J., et al., Study on deformation behavior and strain homogeneity during cyclic extrusion and compression. Journal of materials science, 43(21), 2008, pp. 6920-6924.