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In situ measurement of deformation mechanics and its spatio-temporal scaling behavior in equal channel angular pressing

Published online by Cambridge University Press:  31 March 2015

Marzyeh Moradi ,
Saurabh Basu  and
Meenakshisundaram Ravi Shankar
Marzyeh Moradi
Affiliation:
Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
Saurabh Basu
Affiliation:
Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
Meenakshisundaram Ravi Shankar*
Affiliation:
Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
*
a)Address all correspondence to this author. e-mail: ravishm@pitt.edu
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Abstract

Deformation mechanics in equal channel angular pressing (ECAP) was studied in situ using digital image correlation (DIC) and infra-red (IR) thermography. In a prototypical experiment in an optical and IR transparent die, the deformation of commercially pure lead (Pb) is observed using high-speed optical and IR cameras. From the resulting time-sequence images of metal-flow in the deformation zone, DIC is used to characterize the zone of severe plastic deformation (SPD) as a function of the scale of deformation (sample dimensions), deformation speed, and die geometry. The temperature rise in the deformation zone was characterized using IR thermography and the results were compared against theoretical estimates. These observations provide direct insights into the mechanics of SPD in ECAP, which can offer strategies for microstructure control, process optimization, and miniaturization of ECAP.

Keywords

equal channel angular pressingdeformation mechanicsdigital image correlation
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 6 , 28 March 2015 , pp. 798 - 810
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

Iwahashi, Y., Horita, Z., Nemoto, M., and Langdon, T.G.: The process of grain refinement in equal-channel angular pressing. Acta Mater. 46(9), 3317 (1998).CrossRefGoogle Scholar
Iwahashi, Y., Wang, J., Horita, Z., Nemoto, M., and Langdon, T.G.: Principle of equal-channel angular pressing for the processing of ultra-fine grained materials. Scr. Mater. 35(2), 143 (1996).CrossRefGoogle Scholar
Raab, G., Soshnikova, E., and Valiev, R.: Influence of temperature and hydrostatic pressure during equal-channel angular pressing on the microstructure of commercial-purity Ti. Mater. Sci. Eng., A 387, 674 (2004).CrossRefGoogle Scholar
Zehetbauer, M., Stüwe, H., Vorhauer, A., Schafler, E., and Kohout, J.: The role of hydrostatic pressure in severe plastic deformation. Adv. Eng. Mater. 5(5), 330 (2003).Google Scholar
Abolghasem, S., Basu, S., Shekhar, S., Cai, J., and Shankar, M.: Mapping subgrain sizes resulting from severe simple shear deformation. Acta Mater. 60(1), 376 (2012).Google Scholar
Stoica, G., Fielden, D., McDaniels, R., Liu, Y., Huang, B., Liaw, P., Xu, C., and Langdon, T.: An analysis of the shear zone for metals deformed by equal-channel angular processing. Mater. Sci. Eng., A 410, 239 (2005).Google Scholar
Figueiredo, R.B., Aguilar, M.T.P., and Cetlin, P.R.: Finite element modelling of plastic instability during ECAP processing of flow-softening materials. Mater. Sci. Eng., A 430(1), 179 (2006).Google Scholar
Suh, J-Y., Kim, H-S., Park, J-W., and Chang, J-Y.: Finite element analysis of material flow in equal channel angular pressing. Scr. Mater. 44(4), 677 (2001).Google Scholar
Bruck, H., McNeill, S., Sutton, M.A., and Peters Iii, W.: Digital image correlation using Newton-Raphson method of partial differential correction. Exp. Mech. 29(3), 261 (1989).Google Scholar
Pan, B., Qian, K., Xie, H., and Asundi, A.: Two-dimensional digital image correlation for in-plane displacement and strain measurement: A review. Meas. Sci. Technol. 20(6), 062001 (2009).Google Scholar
Steijn, R.: On the wear of sapphire. J. Appl. Phys. 32(10), 1951 (1961).Google Scholar
Balasundar, I. and Raghu, T.: Effect of friction model in numerical analysis of equal channel angular pressing process. Mater. Des. 31(1), 449 (2010).Google Scholar
Balasundar, I., Sudhakara Rao, M., and Raghu, T.: Equal channel angular pressing die to extrude a variety of materials. Mater. Des. 30(4), 1050 (2009).Google Scholar
Kim, H.S., Seo, M.H., and Hong, S.I.: On the die corner gap formation in equal channel angular pressing. Mater. Sci. Eng., A 291(1), 86 (2000).Google Scholar
Lee, S., Hwang, J., Shankar, M.R., Chandrasekar, S., and Compton, W.D.: Large strain deformation field in machining. Metall. Mater. Trans. A 37(5), 1633 (2006).CrossRefGoogle Scholar
Doyle, E., Horne, J., and Tabor, D.: Frictional interactions between chip and rake face in continuous chip formation. Proc. R. Soc. A 366(1725), 173 (1979).Google Scholar
Valiev, R.Z. and Langdon, T.G.: Principles of equal-channel angular pressing as a processing tool for grain refinement. Prog. Mater. Sci. 51(7), 881 (2006).Google Scholar
Adrian, R.J.: Twenty years of particle image velocimetry. Exp. Fluids 39(2), 159 (2005).Google Scholar
Verhulp, E., Rietbergen, B.v., and Huiskes, R.: A three-dimensional digital image correlation technique for strain measurements in microstructures. J. Biomech. 37(9), 1313 (2004).CrossRefGoogle ScholarPubMed
Palmer, W. and Oxley, P.: Mechanics of orthogonal machining. Proc. Inst. Mech. Eng. 173(1), 623 (1959).Google Scholar
Marusich, T. and Ortiz, M.: Modelling and simulation of high speed machining. Int. J. Numer. Methods Eng. 38(21), 3675 (1995).CrossRefGoogle Scholar
Oxley, P. and Hastings, W.: Predicting the strain rate in the zone of intense shear in which the chip is formed in machining from the dynamic flow stress properties of the work material and the cutting conditions. Proc. R. Soc. A 356(1686), 395 (1977).Google Scholar
Lapovok, R., Tóth, L.S., Molinari, A., and Estrin, Y.: Strain localisation patterns under equal-channel angular pressing. J. Mech. Phys. Solids 57(1), 122 (2009).Google Scholar
Shekhar, S., Cai, J., Wang, J., and Shankar, M.: Multimodal ultrafine grain size distributions from severe plastic deformation at high strain rates. Mater. Sci. Eng., A 527(1), 187 (2009).Google Scholar
Abolghasem, S., Basu, S., and Shankar, M.R.: Quantifying the progression of dynamic recrystallization in severe shear deformation at high strain rates. J. Mater. Res. 28(15), 2056 (2013).Google Scholar
Kim, H.S.: Prediction of temperature rise in equal channel angular pressing. Mater. Trans., JIM 42(3), 536 (2001).Google Scholar
Dong, Y., Zhang, Y., Alexandrov, I., and Wang, J.: Effect of high strain rate processing on strength and ductility of ultrafine-grained Cu processed by equal channel angular pressing. Rev. Adv. Mater. Sci. 31, 116 (2012).Google Scholar
Quang, P., Krishnaiah, A., Hong, S.I., and Kim, H.S.: Coupled analysis of heat transfer and deformation in equal channel angular pressing of Al and steel. Mater. Trans. 50(1), 40 (2009).Google Scholar
Ravichandran, G., Rosakis, A.J., Hodowany, J., and Rosakis, P.: On the conversion of plastic work into heat during high-strain-rate deformation. Am. Inst. Phys., Conf. Proc. 620(1), 557 (2002).Google Scholar
Mason, J., Rosakis, A., and Ravichandran, G.: On the strain and strain rate dependence of the fraction of plastic work converted to heat: An experimental study using high speed infrared detectors and the Kolsky bar. Mech. Mater. 17(2), 135 (1994).Google Scholar
Eisenlohr, A., Gutierrez-Urrutia, I., and Raabe, D.: Adiabatic temperature increase associated with deformation twinning and dislocation plasticity. Acta Mater. 60(9), 3994 (2012).Google Scholar
Kim, H.S., Quang, P., Seo, M.H., Hong, S.I., Baik, K.H., Lee, H.R., and Nghiep, D.M.: Process modelling of equal channel angular pressing for ultrafine grained materials. Mater. Trans. 45(7), 2172 (2004).Google Scholar
Yamaguchi, D., Horita, Z., Nemoto, M., and Langdon, T.G.: Significance of adiabatic heating in equal-channel angular pressing. Scr. Mater. 41(8), 791 (1999).Google Scholar
Nishida, Y., Ando, T., Nagase, M., Lim, S-w., Shigematsu, I., and Watazu, A.: Billet temperature rise during equal-channel angular pressing. Scr. Mater. 46(3), 211 (2002).Google Scholar
Li, S., Hoferlin, E., Bael, A.V., Houtte, P.V., and Teodosiu, C.: Finite element modeling of plastic anisotropy induced by texture and strain-path change. Int. J. Plast. 19(5), 647 (2003).CrossRefGoogle Scholar
Paul, H., Baudin, T., and Brisset, F.: The effect of the strain path and the second phase particles on the microstructure and the texture evolution of the AA3104 alloy processed by ECAP. Arch. Metall. Mater. 56(2), 245 (2011).Google Scholar