Directional Anisotropy in the Mechanical Behavior of Friction Stir Processed and Aged AZ91 Alloy

Vipin Jain; Wei Yuan; R.S. Mishra; Gouthama Gouthama; Anil K. Gupta

doi:10.4028/www.scientific.net/MSF.702-703.64

Paper Titles

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Directional Anisotropy in the Mechanical Behavior of Friction Stir Processed and Aged AZ91 Alloy
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HomeMaterials Science ForumMaterials Science Forum Vols. 702-703Directional Anisotropy in the Mechanical Behavior...

Directional Anisotropy in the Mechanical Behavior of Friction Stir Processed and Aged AZ91 Alloy

Abstract:

Friction stir processing (FSP) is an emerging grain refinement technique for magnesium alloys. In this study, a cast AZ91 alloy was processed by a single-pass FSP to achieve an average grain size of ~6 mm in the nugget zone. The FSP is found to introduce texture in the alloy due to preferred alignment of basal poles in the processing direction. The mechanical behavior is significantly influenced by texture. After FSP, the alloy was aged at different temperatures and times for continuous and discontinuous precipitation of b-Mg₁₇Al₁₂. A high anisotropy in yield stress is observed in the processing and transverse direction after FSP. It is shown that this anisotropy can be minimized under optimum ageing conditions. The observed yield asymmetry is correlated with the texture variation after FSP. The role of b-Mg₁₇Al₁₂precipitates in reducing the yield anisotropy is also discussed.

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Materials Science Forum (Volumes 702-703)

Pages:

64-67

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.702-703.64

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Online since:

December 2011

Authors:

Vipin Jain, Wei Yuan, R.S. Mishra, Gouthama Gouthama, Anil K. Gupta

Keywords:

AZ91, Friction Stir Processing (FSP), Textural Anisotropy

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References

[1] R.S. Mishra, Z.Y. Ma, Friction Stir Welding and Processing, Mater. Sci. Engg. R 50 (2005) 1-78.

Google Scholar

[2] U.F.H.R. Suhuddin, S. Mironov, Y.S. Sato, H. Kokawa, C.W. Lee, Grain structure evolution during friction-stir welding of AZ31 magnesium alloy, Acta Mater. 17 (2009) 5406-5418.

DOI: 10.1016/j.actamat.2009.07.041

Google Scholar

[3] W. Yuan, R.S. Mishra, B. Carlson, R.K. Mishra, R. Verma, R. Kubic, Effect of texture on the mechanical behavior of ultrafine grained magnesium alloys, Scripta Mater. 64 (2011) 580-583.

DOI: 10.1016/j.scriptamat.2010.11.052

Google Scholar

[4] K.N. Braszczynska-Malik, Discontinuous and continuous precipitation in magnesium-aluminum type alloys, J. Alloys Compnd. 477 (2009) 870-876.

DOI: 10.1016/j.jallcom.2008.11.008

Google Scholar

[5] W.B. Hutchinson, M.R. Barnett, Effective values of critical resolved shear stress for slip in polycrystalline magnesium and other hcp metals, Scripta Mater. 63 (2010) 737–740.

DOI: 10.1016/j.scriptamat.2010.05.047

Google Scholar

[6] J. Jain, W.J. Poole, C.W. Sinclair, M.A. Gharhouri, Reducing the tension-compression yield asymmetry in a Mg-8Al-0. 5Zn alloy via precipitation, Scripta Mater. 62 (2010) 301-304.

DOI: 10.1016/j.scriptamat.2009.11.024

Google Scholar

[7] M.A. Gharghouri, G.C. Weatherly, J.D. Embury, The interaction of twins and precipitates in a Mg-7. 7at% Al alloy, Phil. Magazine A. 78 (5) (1998) 1137-1149.

DOI: 10.1080/01418619808239980

Google Scholar