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Grain refinement at the nanoscale via mechanical twinning and dislocation interaction in a nickel-based alloy

Published online by Cambridge University Press:  03 March 2011

N.R. Tao ,
X.L. Wu ,
M.L. Sui ,
J. Lu  and
K. Lu
N.R. Tao
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
X.L. Wu
Affiliation:
State Key Laboratory of Nonlinear Mechanics, Institute of Mechanism, Chinese Academy of Sciences, Beijing 100080, China
M.L. Sui
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
J. Lu*
Affiliation:
LASMIS, University of Technology of Troyes, 10000 Troyes, France
K. Lu
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

A nanostructured surface layer was formed on an Inconel 600 plate by subjecting it to surface mechanical attrition treatment at room temperature. Transmission electron microscopy and high-resolution transmission electron microscopy of the treated surface layer were carried out to reveal the underlying grain refinement mechanism. Experimental observations showed that the strain-induced nanocrystallization in the current sample occurred via formation of mechanical microtwins and subsequent interaction of the microtwins with dislocations in the surface layer. The development of high-density dislocation arrays inside the twin-matrix lamellae provides precursors for grain boundaries that subdivide the nanometer-thick lamellae into equiaxed, nanometer-sized grains with random orientations.

Keywords

Grain refinementNanostructured materialsMechanical microtwin
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 6 , June 2004 , pp. 1623 - 1629
Copyright
Copyright © Materials Research Society 2004

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References

REFERENCES

1Koch, C.C.: The synthesis and structure of nanocrystalline materials produced by mechanical attrition. Nanostruct. Mater. 2, 109 (1993).CrossRefGoogle Scholar
2Fecht, H.J., in Nanophase Materials , edited by Hadjipanayis, G.C. and Siegel, R.W. (Kluwer Academic Publishers, Dordrecht, The Netherlands, 1994), p. 125.CrossRefGoogle Scholar
3Hansen, N.: Cold deformation microstructures. Mater. Sci. Tech. 6, 1039 (1990).CrossRefGoogle Scholar
4Wang, Y.M., Chen, M.W., Sheng, H.W. and Ma, E.: Nanocrystalline grain structures developed in commercial purity Cu by low-temperature cold rolling. J. Mater. Res. 17, 3004 (2002).CrossRefGoogle Scholar
5Valiev, R.Z., Mulyukov, R.R., Ovchinnikov, V.V. and Shabashov, V.A.: Mössbauer analysis of submicrometer grained iron. Scr. Metall. Mater. 25, 2717 (1991).CrossRefGoogle Scholar
6Iwahashi, Y., Horita, Z., Nemoto, M. and Langdon, T.G.: The process of grain refinement in equal-channel angular pressing. Acta Mater. 46, 3317 (1998).CrossRefGoogle Scholar
7Zhilyaev, A.P., Lee, S., Nurislamova, G.V., Valiev, R.Z. and Langdon, T.G.: Microhardness and microstructural evolution in pure nickel during high-pressure torsion. Scr. Mater. 44, 2753 (2001).CrossRefGoogle Scholar
8Valiev, R.Z. and Alexandrov, I.V.: Nanostructured materials from severe plastic deformation. Nanostruct. Mater. 12, 35 (1999).CrossRefGoogle Scholar
9Tao, N.R., Sui, M.L., Lu, J. and Lu, K.: Surface nanocrystallization of iron induced by ultrasonic shot peening. Nanostruct. Mater. 11, 433 (1999).CrossRefGoogle Scholar
10Tong, W.P., Tao, N.R., Wang, Z.B., Lu, J. and Lu, K.: Nitriding iron at lower temperatures. Science 299, 686 (2003).CrossRefGoogle ScholarPubMed
11Tao, N.R., Wang, Z.B., Tong, W.P., Sui, M.L., Lu, J. and Lu, K.: An investigation of surface nanocrystallization mechanism in Fe induced by surface mechanical attrition treatment. Acta Mater. 50, 4603 (2002).CrossRefGoogle Scholar
12Belyakov, A., Sakai, T., Miura, H. and Tsuzaki, K.: Grain refinement in copper under large strain deformation. Philos. Mag. A 81, 2629 (2001).CrossRefGoogle Scholar
13Hughes, D.A.: Scaling of deformation-induced microstructures in fcc metals. Scr. Mater. 47, 697 (2002).CrossRefGoogle Scholar
14Hughes, D.A. and Hansen, N.: Microstructure and strength of nickel at large strains. Acta Metall. 48, 2985 (2000).Google Scholar
15Bay, B., Hansen, N., Hughes, D.A. and Kuhlmann-Wilsdorf, D.: Evolution of f.c.c. deformation structures in polyslip. Acta Metall. 40, 205 (1992).CrossRefGoogle Scholar
16Wu, X., Tao, N., Hong, Y., Xu, B., Lu, J. and Lu, K.: Microstructure and evolution of mechanically-induced ultrafine grain in surface layer of Al-alloy subjected to USSP. Acta Mater. 50, 2075 (2002).CrossRefGoogle Scholar
17Shin, D.H., Kim, I., Kim, J. and Park, K.T.: Grain refinement mechanism during equal-channel angular pressing of a low-carbon steel. Acta Mater. 49, 1285 (2001).CrossRefGoogle Scholar
18Lu, K., Lu, J., Chinese Patent No. 01122980. 2 (2001); French Patent No. FR2812284 (2001).Google Scholar
19Manero, J.M., Gil, F.J. and Planell, J.A.: Deformation mechanisms of Ti–6Al–4V alloy with a martensitic microstructure subjected to oligocyclic fatigue. Acta Mater. 48, 3353 (2000).CrossRefGoogle Scholar
20Murr, L.E., in Interfacial Phenomena in Metals and Alloys (Techbooks, Herndan, VA, 1975), p. 145.Google Scholar
21Kumar, M., Schwartz, A.J. and King, W.E.: Microstructural evolution during grain boundary engineering of low to medium stacking fault energy fcc materials. Acta Mater. 50, 2599 (2002).CrossRefGoogle Scholar