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Production of fine-grained foils by large strain extrusion-machining of textured Ti–6Al–4V

Published online by Cambridge University Press:  18 December 2017

Karthik Palaniappan ,
H. Murthy  and
Balkrishna C. Rao
Karthik Palaniappan
Affiliation:
Department of Engineering Design, IIT Madras, Chennai-600 036, India
H. Murthy
Affiliation:
Department of Aerospace Engineering, IIT Madras, Chennai-600 036, India
Balkrishna C. Rao*
Affiliation:
Department of Engineering Design, IIT Madras, Chennai-600 036, India
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The large strain extrusion-machining process has been used to refine the microstructure in a Titanium alloy (Ti–6Al–4V). The unconstrained cutting or machining of Ti–6Al–4V entails the formation of shear localized chips at nearly all cutting speeds, thereby hindering the use of extrusion-machining to produce fine-grained materials. The present effort attempts to suppress shear localization by the suitable modification of texture in Ti–6Al–4V through the cold-rolling process prior to extrusion-machining. Ti–6Al–4V plates were cold rolled to 30, 40, 45, and 47% thickness reductions. These textured plates were extrusion machined using a suitably designed fixture leading to fine-grained continuous foils with increased hardness. Microscopy has revealed that the suppression of shear localization in the foils produced from plates which are cold rolled to more than 40% of thickness reduction is triggered by texture formation. For thickness reductions slightly lower than 40% (e.g., 30%), suppression can be achieved only by a combination of texture and extrusion.

Keywords

Timachiningtexture
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 2 , 29 January 2018 , pp. 108 - 120
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

REFERENCES

Swaminathan, S., Shankar, M.R., Lee, S., Hwang, J., King, A.H., Kezar, R.F., Rao, B.C., Brown, T.L., Chandrasekar, S., Compton, W.D., and Trumble, K.P.: Large strain deformation and ultra-fine-grained materials by machining. Mater. Sci. Eng., A 410–411, 358 (2005).Google Scholar
Brown, T.L., Swaminathan, S., Chandrasekar, S., Compton, W.D., King, A.H., and Trumble, K.P.: Low-cost manufacturing process for nanostructured metals and alloys. J. Mater. Res. 17, 2484 (2002).Google Scholar
Farrokh, B. and Khan, A.S.: Grain size, strain rate, and temperature dependence of flow stress in ultra-fine grained and nanocrystalline Cu and Al: Synthesis, experiment, and constitutive modelling. Int. J. Plast. 25, 715 (2009).Google Scholar
Valiev, R.: Nanostructuring of metals by severe plastic deformation for advanced properties. Nat. Mater. 3, 511 (2004).Google Scholar
Lütjering, G. and Williams, J.C.: Titanium, 2nd ed. (Springer Berlin, Germany, 2007); pp. 34–209.Google Scholar
Ko, Y., Jung, W., Shin, D., and Lee, C.: Effects of temperature and initial microstructure on the equal channel angular pressing of Ti–6Al–4V alloy. Scr. Mater. 48, 197 (2003).Google Scholar
Wang, Y.C. and Langdon, T.G.: Effect of heat treatment on microstructure and microhardness evolution in a Ti–6Al–4V alloy processed by high-pressure torsion. J. Mater. Sci. 48, 4646 (2013).CrossRefGoogle Scholar
Blair, G.A.S., Fannin, T.F., and Gordon, D.S.: Titanium-strip cranioplasty. Br. Med. J. 2, 907 (1976).Google Scholar
Saldana, C., Yang, P., Mann, J.B., Moscoso, W., Gill, D.D., Chandrasekar, S., and Trumble, K.P.: Micro-scale components from high-strength nanostructured alloys. Mater. Sci. Eng., A 503, 172 (2009).Google Scholar
Zhen-Bin, H. and Komanduri, R.: On thermomechanical model of shear instability in machining. CIRP Ann. 44, 69 (1995).Google Scholar
Recht, R.F.: Catastrophic thermoplastic shear. J. Appl. Mech. 31, 189 (1964).Google Scholar
Komanduri, R.: Some clarifications on the mechanics of chip formation when machining titanium alloys. Wear 76, 15 (1982).Google Scholar
Vyas, A. and Shaw, M.C.: Mechanics of saw-tooth chip formation in metal cutting. J. Manuf. Sci. Eng. Trans. ASME 121, 163 (1999).Google Scholar
Nakayama, K.: The formation of saw-toothed chip in metal cutting. Proc. Int. Conf. Prod. Eng. 1, 572 (1974).Google Scholar
Roy, S., Suwas, S., Tamiriskandala, S., Srinivasan, R., and Miracle, D.B.: Microstructure and texture evolution during beta extrusion of boron modified Ti–6Al–4V alloy. Mater. Sci. Eng., A 540, 152 (2012).Google Scholar
Peters, M., Gysler, A., and Lütjering, G.: Influence of texture on fatigue properties of Ti–6Al–4V. Metall. Trans. A 15, 1597 (1984).CrossRefGoogle Scholar
Zaefferer, S.: A study of active deformation systems in titanium alloys: Dependence on alloy composition and correlation with deformation texture. Mater. Sci. Eng., A 344, 20 (2003).Google Scholar
Mehdi, B., Azzeddine, H., Badji, R., Ji, V., Alili, B., and Bradai, D.: Characterization of the deformation texture after tensile test and cold rolling of a Ti–6Al–4V sheet alloy. IOP Conf. Ser. Mater. Sci. Eng. 82, 012018 (2015).Google Scholar
Sun, S., Brandt, M., and Dargusch, M.S.: Characteristics of cutting forces and chip formation in machining of titanium alloys. Inter. J. Mach. Tools Manuf. 49, 561 (2009).CrossRefGoogle Scholar
ASM International Handbook Committe: ASM Handbook Volume 4: Heat Treating (ASM International, Materials Park, Ohio, 1991); p. 915.Google Scholar
Guo, Y., Saldana, C., Compton, W.D., and Chandrasekar, S.: Controlling deformation and microstructure on machined surfaces. Acta Mater. 59, 4538 (2011).Google Scholar
Efe, M., Moscoso, W., Trumble, K.P., Compton, W.D., and Chandrasekar, S.: Mechanics of large strain extrusion machining and application to deformation processing of magnesium alloys. Acta Mater. 60, 2031 (2012).Google Scholar
Brown, T.L., Saldana, C., Murthy, T.G., Mann, J.B., Guo, Y., Allard, L.F., King, A.H., Compton, W.D., Trumble, K.P., and Chandrasekar, S.: A study of the interactive effects of strain, strain rate and temperature in severe plastic deformation of copper. Acta Mater. 57, 5491 (2009).Google Scholar
Moscoso, W., Shankar, M.R., Mann, J., Compton, W., and Chandrasekar, S.: Bulk nanostructured materials by large strain extrusion machining. J. Mater. Res. 22(1), 201 (2007).CrossRefGoogle Scholar
Prakash, D.L., Ding, R., Moat, R., Jones, I., Withers, P., da Fonseca, J.Q., and Preuss, M.: Deformation twinning in Ti–6Al–4V during low strain rate deformation to moderate strains at room temperature. Mater. Sci. Eng., A 527, 5734 (2010).Google Scholar
Bachmann, F., Hielscher, R., and Schaeben, H.: Texture analysis with MTEX-free and open source software toolbox. Solid State Phenom. 160, 63 (2010).CrossRefGoogle Scholar
da Silva, S.L.R., Kerber, L.O., Amaral, L., and dos Santos, C.A.: X-ray diffraction measurements of plasma-nitrided Ti–6Al–4V. Surf. Coat. Technol. 116, 342 (1999).Google Scholar
Suwas, S. and Gurao, N.P.: Crystallographic texture in materials. J. Indian Inst. Sci. 88, 151 (2008).Google Scholar
Morii, K., Mecking, H., Lütjering, G., and Nakayama, Y.: Stability of the texture of Ti–6Al–4V during rolling in the two-phase field. Scr. Metall. 20, 1795 (1986).Google Scholar
Philippe, M., Bouzy, E., and Fundenberger, J-J.: Textures and anisotropy of titanium alloys. Mater. Sci. Forum 273, 511 (1998).CrossRefGoogle Scholar
Lee, H., Esling, C., and Bunge, H.: Development of the rolling texture in titanium. Textures Microstruct. 7, 317 (1988).Google Scholar
ASTM E407-07 E1: Standard Practice for Microetching Metals and Alloys (ASTM International, West Conshohocken, PA, 2007).Google Scholar
Sagapuram, D., Yeung, H., Guo, Y., Mahato, A., M’Saoubi, R., Compton, W.D., Trumble, K.P., and Chandrasekar, S.: On control of flow instabilities in cutting of metals. CIRP Ann. 64, 49 (2015).Google Scholar
Sagapuram, D., Viswanathan, K., Mahato, A., Sundaram, N.K., M’Saoubi, R., Trumble, K.P., and Chandrasekar, S.: Geometric flow control of shear bands by suppression of viscous sliding. Proc. R. Soc. A 472, 20160167 (2016).Google Scholar
Huang, X., Suzuki, K., Yuasa, M., and Chino, Y.: Microstructural and textural evolution of pure titanium during differential speed rolling and subsequent annealing. J. Mater. Sci. 12, 3166 (2014).Google Scholar