Microstructural Evolution of Mg-4Nd Alloy Processed by High-Pressure Torsion

Jing Bai; Feng Xue; Saleh N. Alhajeri; Terence G. Langdon

doi:10.4028/www.scientific.net/MSF.667-669.391

Paper Titles

Numerical Simulation and Experimental Investigation of Grain Refinement Behavior in Equal Channel Angular Pressing/Extrusion Process
p.367

Grain Subdivision of a Nb Polycrystal Deformed by Successive Compression Tests
p.373

Influence of Stacking Fault Energy on the Microstructures and Grain Refinement in the Cu-Al Alloys during Equal-Channel Angular Pressing
p.379

The Influence of Texture and Grain Size on Compressive Deformation Behavior of Pure Mg through Equal-Channel Angular Processing
p.385

Microstructural Evolution of Mg-4Nd Alloy Processed by High-Pressure Torsion
p.391

Developing the Technique of Severe Plastic Deformation Processing through High-Pressure Torsion
p.397

High-Temperature Severe Plastic Deformation of Ferritic Steel by Torsion
p.403

The Structure of Nb Obtained by Severe Plastic Deformation and its Thermal Stability
p.409

Microstructural Evolution of Ultrafine-Grained Steel during Tandem Rolling Process
p.415

HomeMaterials Science ForumMaterials Science Forum Vols. 667-669Microstructural Evolution of Mg-4Nd Alloy...

Microstructural Evolution of Mg-4Nd Alloy Processed by High-Pressure Torsion

Abstract:

Disks of as-extruded Mg-4Nd alloy were processed by high-pressure torsion (HPT) through ¼ to 5 turns at room temperature. The first 1/4 turn of HPT induces large numbers of twins and some dislocation tangles in the center region of the disk. With increase of torsional straining, the twinning is inhibited gradually and the dislocation density increases relating to the formation of dislocation substructures and ultimately transforming to high fractions of equiaxed gains which have an average grain size of ~200 nm and high-angle boundaries. HPT significantly improves the values of microhardness of this alloy. The hardness values in both the central and edge regions show a sharp rise after HPT for 1/4 turn and exhibit nearly saturation after 1/2 turn although there is a trend of a slight increase with increasing numbers of turns. The experimental results suggest more homogeneous microstructures may be produced by larger numbers of turns in the HPT process.

You might also be interested in these eBooks

Nanomaterials by Severe Plastic Deformation: NanoSPD5

View Preview

Info:

Periodical:

Materials Science Forum (Volumes 667-669)

Pages:

391-396

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.667-669.391

Citation:

Cite this paper

Online since:

December 2010

Authors:

Jing Bai, Feng Xue, Saleh N. Alhajeri, Terence G. Langdon

Keywords:

Hardness, High Pressure Torsion (HPT), Homogeneity, Magnesium Alloy, Microstructure

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

Сopyright:

References

[1] A.P. Zhilyaev and T.G. Langdon: Prog Mate Sci Vol. 53 (2008), p.893.

Google Scholar

[2] C. Xu, Z. Horita and T.G. Langdon: Acta Mater Vol. 55 (2007), p.203.

Google Scholar

[3] H. Jiang, Y.T. Zhu, D.P. Butt, I.V. Alexandrov and T.C. Lowe: Mater Sci Eng A Vol. 290 (2000), p.128.

Google Scholar

[4] Y. Cao, Y.B. Wang, S.N. Alhajeri, X.Z. Liao, W.L. Zheng, S.P. Ringer, T.G. Langdon and Y.T. Zhu: J Mater Sci Vol. 45 (2010), p.765.

Google Scholar

[5] M. Kai, Z. Horita and T.G. Langdon: Mater Sci Eng A Vol. 488 (2008), p.117.

Google Scholar

[6] Y. Harai, M. Kai, K. Kaneko, Z. Horita and T.G. Langdon: Mater Trans Vol. 49 (2008), p.76.

Google Scholar

[7] J. Cizek, I. Prochazka, B. Smola, I. Stulikova, R. Kuzel, Z. Matej, V. Cherkaska, R.K. Islamgaliev and O. Kulyasova: Mater Sci Eng A Vol. 462 (2007), p.121.

DOI: 10.1007/1-4020-4972-2_429

Google Scholar

[8] B.J. Bonarski, E. Schafler, B. Mingler, W. Skrotzki, B. Mikulowski and M.J. Zehetbauer: J Mater Sci Vol. 43 (2008), p.7513.

DOI: 10.1007/s10853-008-2794-8

Google Scholar

[9] J. Yan, Y. Sun, F. Xue, S. Xue and W. Tao: Mater Sci Eng A Vol. 476 (2008), p.366.

Google Scholar

[10] F. Wetscher, A. Vorhauer, R. Stock and R. Pippan: Mater Sci Eng A Vol. 387-389 (2004), p.809.

Google Scholar

[11] H.Q. Sun, Y.N. Shi, M.X. Zhang and K. Lu: Acta Mate Vol. 55 (2007), p.975.

Google Scholar

[12] Q. Yang and A.K. Ghosh: Acta Mater Vol. 54 (2006), p.5147.

Google Scholar

[13] Y.B. Wang, X.Z. Liao, Y.H. Zhao, E.J. Lavernia, S.P. Ringer, Z. Horita, T.G. Langdon and Y.T. Zhu: Mater Sci Eng A Vol. 527 (2010), p.4959.

Google Scholar

[14] C. Xu and T.G. Langdon: Mater Sci Eng A Vol. 503 (2009), p.71.

Google Scholar