Hostname: page-component-8448b6f56d-cfpbc Total loading time: 0 Render date: 2024-04-23T23:10:14.964Z Has data issue: false hasContentIssue false
  • English
  • Français

Study on structure homogeneity of plate sample with large dimension during equal channel angular pressing (ECAP)

Published online by Cambridge University Press:  20 October 2016

Jinfang Dong ,
Qing Dong ,
Yongbing Dai ,
Hui Xing ,
Yanfeng Han ,
Jianbo Ma ,
Jiao Zhang ,
Jun Wang  and
Baode Sun
Jinfang Dong
Affiliation:
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
Qing Dong
Affiliation:
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
Yongbing Dai
Affiliation:
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
Hui Xing*
Affiliation:
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
Yanfeng Han
Affiliation:
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
Jianbo Ma
Affiliation:
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
Jiao Zhang*
Affiliation:
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
Jun Wang
Affiliation:
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
Baode Sun
Affiliation:
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
*
a) Address all correspondence to these authors. e-mail: xinghui@sjtu.edu.cn
b) e-mail: zj119@sjtu.edu.cn
Get access

Abstract

A self-made die with large cross section (180.2 × 22.2 mm) for equal channel angular pressing (ECAP) was used to study the influence of two different pressing routes (C X and C Y ) on refining homogeneity of high-purity aluminum plates. Microstructures were investigated by optical microscopy (OM) and electron back scatter diffraction (EBSD) methods, and micro-hardness and tensile tests were taken to evaluate deformation degree across the cross section and mechanical properties, respectively. The results indicate that pressing routes of ECAP have a great influence on structure homogeneity of plate samples. The route C Y leads to fine grains with better homogeneity because the same deformation direction is taken through each pass. Coarse columnar crystals with 3–4 mm change to 68.6 μm nearly equiaxed grains and a strong cube texture forms after four C Y passes, and corresponding mechanical properties increase by a factor compared to as-cast plate.

Keywords

equal-channel angular pressinghigh-purity aluminumstructuregrainhomogeneity
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 21 , 14 November 2016 , pp. 3420 - 3427
Check for updates
Copyright
Copyright © Materials Research Society 2016 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

Contributing Editor: Jürgen Eckert

References

REFERENCES

Segal, V.M.: Materials processing by simple shear. Mater. Sci. Eng., A 197(2), 157 (1995).Google Scholar
Shekhar, S., Cai, J., Basu, S., Abolghasem, S., and Ravi Shankar, M.: Effect of strain rate in severe plastic deformation on microstructure refinement and stored energies. J. Mater. Res. 26(3), 395 (2011).CrossRefGoogle Scholar
Oh-ishi, K., Horita, Z., Smith, D.J., and Langdon, T.G.: Grain boundary structure in Al–Mg and Al–Mg–Sc alloys after equal-channel angular pressing. J. Mater. Res. 16(2), 583 (2001).Google Scholar
Masoudpanah, S.M. and Mahmudi, R.: Effects of rare earth elements and Ca additions on high temperature mechanical properties of AZ31 magnesium alloy processed by ECAP. Mater. Sci. Eng., A 527(16–17), 3685 (2010).Google Scholar
Sun, Z.M., Hashimoto, H., Keawprak, N., Ma, A.B., Li, L.F., and Barsoum, M.W.: Effect of rotary-die equal channel angular pressing on the thermoelectric properties of a (Bi,Sb)2Te3 alloy. J. Mater. Res. 20(4), 895 (2005).Google Scholar
Miyamoto, H., Fushimi, J., Mimaki, T., Vinogradov, A., and Hashimoto, S.: Dislocation structures and crystal orientations of copper single crystals deformed by equal-channel angular pressing. Mater. Sci. Eng., A 405(1–2), 221 (2005).CrossRefGoogle Scholar
Polyakov, A.V., Semenova, I.P., Valiev, R.Z., Huang, Y., and Langdon, T.G.: Influence of annealing on ductility of ultrafine-grained titanium processed by equal-channel angular pressing–Conform and drawing. J. Mater. Res. 3(4), 249 (2013).Google Scholar
Watanabe, H., Somekawa, H., and Higashi, K.: Fine-grain processing by equal channel angular extrusion of rapidly quenched bulk Mg–Y–Zn alloy. J. Mater. Res. 20(1), 93 (2005).Google Scholar
Du, X.N., Yin, S.M., Liu, S.C., Wang, B.Q., and Guo, J.D.: Effect of the electropulsing on mechanical properties and microstructure of an ECAPed AZ31 Mg alloy. J. Mater. Res. 23(6), 1570 (2008).Google Scholar
Chaudhury, P.K., Cherukuri, B., and Srinivasan, R.: Scaling up of equal-channel angular pressing and its effect on mechanical properties, microstructure, and hot workability of AA 6061. Mater. Sci. Eng., A 410–411, 316 (2005).CrossRefGoogle Scholar
Horita, Z., Fujinami, T., and Langdon, T.G.: The potential for scaling ECAP: Effect of sample size on grain refinement and mechanical properties. Mater. Sci. Eng., A 318(1–2), 34 (2001).Google Scholar
Valiev, R.Z., Islamgaliev, R.K., and Semenova, I.P.: Superplasticity in nanostructured materials: New challenges. Mater. Sci. Eng., A 463(1–2), 2 (2007).Google Scholar
Salem, A.A., Langdon, T.G., Mcnelley, T.R., Kalidindi, S.R., and Semiatin, S.L.: Strain-path effects on the evolution of microstructure and texture during the severe-plastic deformation of aluminum. Metall. Mater. Trans. A 37(9), 2879 (2006).Google Scholar
Moradi, M., Basu, S., and Ravi Shankar, M.: In situ measurement of deformation mechanics and its spatiotemporal scaling behavior in equal channel angular pressing. J. Mater. Res. 30(6), 798 (2015).CrossRefGoogle Scholar
Zhilyaev, A.P., Oh-ishi, K., Raab, G.I., and McNelley, T.R.: Influence of ECAP processing parameters on texture and microstructure of commercially pure aluminum. Mater. Sci. Eng., A 441(1–2), 245 (2006).Google Scholar
El-Danaf, E.A.: Mechanical properties and microstructure evolution of 1050 aluminum severely deformed by ECAP to 16 passes. Mater. Sci. Eng., A 487(1–2), 189 (2008).Google Scholar
Saxl, I., Kalousová, A., Ilucová, L., and Sklenička, V.: Grain and subgrain boundaries in ultrafine-grained materials. Mater. Charact. 60(10), 1163 (2009).Google Scholar
Lapovok, R., Tóth, L.S., Winkler, M., and Semiatin, S.L.: A comparison of continuous SPD processes for improving the mechanical properties of aluminum alloy 6111. J. Mater. Res. 24(2), 459 (2009).Google Scholar
Chakkingal, U., Suriadi, A.B., and Thomson, P.F.: The development of microstructure and the influence of processing route during equal channel angular drawing of pure aluminum. Mater. Sci. Eng., A 266(1–2), 241 (1999).CrossRefGoogle Scholar
Sun, P-L., Kao, P-W., and Chang, C-P.: Effect of deformation route on microstructural development in aluminum processed by equal channel angular extrusion. Metall. Mater. Trans. A 35(4), 1359 (2004).CrossRefGoogle Scholar
Hoseini, M., Meratian, M., Toroghinejad, M.R., and Szpunar, J.A.: The role of grain orientation in microstructure evolution of pure aluminum processed by equal channel angular pressing. Mater. Charact. 61(12), 1371 (2010).Google Scholar
Mishin, O.V., Bowen, J.R., and Lathabai, S.: Quantification of microstructure refinement in aluminium deformed by equal channel angular extrusion: Route A vs. route Bc in a 90 die. Scr. Mater. 63(1), 20 (2010).CrossRefGoogle Scholar
Kamachi, M., Furukawa, M., Horita, Z., and Langdon, T.G.: Equal-channel angular pressing using plate samples. Mater. Sci. Eng., A 361(1–2), 258 (2003).Google Scholar
Langdon, T.G.: The principles of grain refinement in equal-channel angular pressing. Mater. Sci. Eng., A 462(1–2), 3 (2007).CrossRefGoogle Scholar
Prangnell, P.B., Gholinia, A., and Markushev, M.V.: The effect of strain path on the rate of formation of high angle grain boundaries during ECAE. In Investigations and Applications of Severe Plastic Deformation, Lowe, T.C. and Valiev, R.Z. eds.; Kluwer Academic Publishers: Dordrecht, The Netherlands, 2000; p. 65.Google Scholar
Jing, Z., Ke-shi, Z., Hwai-Chung, W., and Mei-hua, Y.: Experimental and numerical investigation on pure aluminum by ECAP. Trans. Nonferrous Met. Soc. China 19(5), 1303 (2009).Google Scholar
Kim, H.S.: Evaluation of strain rate during equal-channel angular pressing. J. Mater. Res. 17(1), 172 (2002).Google Scholar
Chinh, N.Q., Horváth, G., Horita, Z., and Langdon, T.G.: A new constitutive relationship for the homogeneous deformation of metals over a wide range of strain. Acta Mater. 52(12), 3555 (2004).Google Scholar
Semiatin, S.L., Delo, D.P., and Shell, E.B.: The effect of material properties and tooling design on deformation and fracture during equal channel angular extrusion. Acta Mater. 48(8), 1841 (2000).Google Scholar
Kawasaki, M., Horita, Z., and Langdon, T.G.: Microstructural evolution in high purity aluminum processed by ECAP. Mater. Sci. Eng., A 524(1–2), 143 (2009).Google Scholar
Lee, I-F., Phan, T.Q., Levine, L.E., Tischler, J.Z., Geantil, P.T., Huang, Y., Langdon, T.G., and Kassner, M.E.: Using X-ray microbeam diffraction to study the long-range internal stresses in aluminum processed by ECAP. Acta Mater. 61(20), 7741 (2013).Google Scholar
Wronski, S., Tarasiuka, J., Bacroix, B., Wierzbanowski, K., and Paul, H.: Microstructure heterogeneity after the ECAP process and its influence on recrystallization in aluminium. Mater. Charact. 78, 60 (2013).Google Scholar
Alhajeri, S.N., Gao, N., and Langdon, T.G.: Hardness homogeneity on longitudinal and transverse sections of an aluminum alloy processed by ECAP. Mater. Sci. Eng., A 528(10–11), 3833 (2011).CrossRefGoogle Scholar
Xu, C., Furukawa, M., Horita, Z., and Langdon, T.G.: The evolution of homogeneity and grain refinement during equal-channel angular pressing: A model for grain refinement in ECAP. Mater. Sci. Eng., A 398(1–2), 66 (2005).Google Scholar
Kammers, A.D., Wongsa-Ngam, J., Langdon, T.G., and Daly, S.: The effect of microstructure heterogeneity on the microscale deformation of ultrafine-grained aluminum. J. Mater. Res. 29(15), 1664 (2014).CrossRefGoogle Scholar
Hoseini, M., Meratian, M., Toroghinejad, M.R., and Szpunar, J.A.: Texture contribution in grain refinement effectiveness of different routes during ECAP. Mater. Sci. Eng., A 497(1–2), 87 (2008).Google Scholar
Skrotzki, W., Scheerbaum, N., Oertel, C-G., Brokmeier, H-G., Suwas, S., and Tóth, L.S.: Recrystallization of high-purity aluminium during equal channel angular pressing. Acta Mater. 55(7), 2211 (2007).Google Scholar