Hostname: page-component-669899f699-chc8l Total loading time: 0 Render date: 2025-04-27T10:05:28.208Z Has data issue: false hasContentIssue false
  • English
  • Français

Dislocation study of ARMCO iron processed by ECAP

Published online by Cambridge University Press:  13 July 2016

Jairo Alberto Muñoz ,
Oscar Fabián Higuera  and
José María Cabrera
Jairo Alberto Muñoz*
Affiliation:
Department of Materials Science and Metallurgical Engineering ETSEIB, Universidad Politécnica de Catalunya, Av Diagonal 647, 08028 Barcelona, Spain.
Oscar Fabián Higuera*
Affiliation:
Department of Materials Science and Metallurgical Engineering ETSEIB, Universidad Politécnica de Catalunya, Av Diagonal 647, 08028 Barcelona, Spain. Faculty of Mechanical Engineering, Universidad del Atlántico, Colombia
José María Cabrera*
Affiliation:
Department of Materials Science and Metallurgical Engineering ETSEIB, Universidad Politécnica de Catalunya, Av Diagonal 647, 08028 Barcelona, Spain. Fundació CTM Centre Tecnológic, Pl. de la Ciencia 2, 08243, Manresa, Spain.
*
ajairo.alberto.munoz@upc.edu
bosfahico@gmail.com
cjose.maria.cabrera@upc.edu
Get access

Abstract

The aim of this work was to study the deformation behavior of an Armco iron after severe plastic deformation by equal channel angular pressing (ECAP). Particular attention was paid to predict the dislocation density by different approaches like the model proposed by Bergström. Experimental measures of dislocation density by different techniques are used in the discussion. Cylindrical samples of ARMCO iron (8mm of diameter, 60mm of length) were subjected to ECAP deformation using a die with an intersecting channel of Φ=90° and outer arc of curvature of ψ= 37° die. Samples were deformed for up to 16 ECAP passes following route Bc. The mechanical properties of the material were measured after each pass by tensile tests. The original grain size of the annealed iron (70 μm) was drastically reduced after ECAP reaching grain sizes close to 300nm after 16 passes.

Keywords

transmission electron microscopy (TEM)dislocationsductility
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1818 , 07 July 2016 , imrc2015s4g-p003
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.)

Article purchase

Temporarily unavailable

References

REFERENCES

Bergström, Y., "A dislocation model for stress-strain behavior of polycrystalline alfa-Fe with special emphasis on the variation of the densities of mobile and immobile dislocations," Mater. Sci. Eng, vol. 5, pp. 193–200, 1969-1970.CrossRefGoogle Scholar
Hansen, N. and Barlow, C., "Plastic Deformation of Metals and Alloys," in Physical Metallurgy, United Kingdom, Elsevier B.V., 2014, pp. 1681–1764.CrossRefGoogle Scholar
Bay, B., Hansen, N., Hughes, D. and Kuhlmann-Wilsdorf, D., Acta Metal Mater, vol. 40, pp. 205–219, 1992.CrossRefGoogle Scholar
Muñoz Bolaños, J., Higuera Cobos, O. and Cabrera Marrero, J., "Strain hardening behavior of ARMCO iron processed by ECAP," IOP Conf. Ser.: Mater. Sci. Eng, vol. 63, p. 012143, 2014.CrossRefGoogle Scholar
Gang, Y., Mu-xin, Y., Zheng-dong, L. and Chang, W., Journal of Iron and Steel Research, vol. 18, no. 12, pp. 40–44, 2011.Google Scholar
Park, K.-T., Han, S., Ahn, B., Shin, D., Lee, Y. and Um, K., Scripta Materialia, vol. 51, pp. 909–913, 2004.CrossRefGoogle Scholar
Ding, Y., Jiang, J. and Shan, A., Materials Science and Engineering A, vol. 509, pp. 76–80, 2009.CrossRefGoogle Scholar
Martin, U., Muhle, U. and Heinrich, O., "The quantitative measurement of dislocation density in the transmission electron microscope," Parkt. Metallogr, vol. 32, p. 467, 1995.Google Scholar
Kim, K., Lee, J., Kim, H. and Lee, Z., "Quantitative Evaluation of Dislocation Density in Epitaxial GaAs Layer on Si Using Transmission Electron Microscopy," Applied Microscopy, vol. 44, no. 2, pp. 74–78, 2014.CrossRefGoogle Scholar
Lutterotti, L., Matthies, S. and Wenk, H. R., "MAUD (Material Analysis Using Diffraction): A user friendly Java program for Rietveld Texture Analysis," Proceeding of the Twelfth International Conference on Textures of Materials (ICOTOM-12), p. 1599, 1999.Google Scholar
Ivanov, Y., Panin, A., Son, A., Kopylov, V. and Klimenov, V., "STRUCTURAL ANALYSIS OF ARMCO IRON SUBJECTED TO EQUAL CHANNEL ANGULAR EXTRUSION," Russian Physics Journal, vol. 48, no. 4, pp. 406–411, 2005.CrossRefGoogle Scholar
Valiev, R. and Langdon, T., "Principles of Equal-channel Angular Pressing as a Processing Tool for Grain Refinement," Progress in Materials Science, vol. 51, pp. 881–981, 2006.CrossRefGoogle Scholar
Zhao, Y., Sheng, H. and Lu, K., "Microstructure evolution and thermal properties in nanocrystalline Fe during mechanical attrition," Acta Mater, vol. 49, pp. 365–375, 2001.CrossRefGoogle Scholar
Bera, S., Chowdhury, S., Estrin, Y. and Manna, I., "Mechanical properties of Al7075 alloy with nano-ceramic oxide dispersion synthesized by mechanical milling and consolidated by equal channel angular pressing," Journal of Alloys and Compounds, vol. 548, pp. 257–265, 2013.CrossRefGoogle Scholar
Ungár, T., Schafler, E. and Gubicza, J., "Microstructure of Bulk Nanomaterials Determined by X-Ray Line-profile Analysis," in Bulk Nanostructured Materials, Darmstadt, WILEY-VCH, 2009, pp. 361–383.CrossRefGoogle Scholar
Zhu, Y. T., Huang, J., Gubicza, J., Ungar, T., Wang, Y. M., Ma, E. and Valiev, R., J. Mater. Res, vol. 18, p. 1908, 2003.CrossRefGoogle Scholar
Wilkens, M., Ungar, T. and Mughrabi, H., Phys. Stat. Sol (a), vol. 104, p. 157, 1987.CrossRefGoogle Scholar