Friction Stir Processing Multi-Run Modification of Cast Aluminum Alloy

Article Preview

Abstract:

The effect of multi-run FSP modification of cast aluminum alloy AlSi9Mg are presented. The relationship between the number of trials and microstructures are shown. FSP process was performed on the typical milling machine specifically adopted for the processing trials. The microstructure was examined by light as well as scanning and transmission electron microscopy. The studies have shown that the multi-run FSP process causes decrease of the grain size and increase of the homogeneity of the microstructure. In contrast to the cast condition, the microstructure in the processed material was characterized by a relatively uniform distribution of the second phase particles. The size and aspect ratio of these particles decreased significantly. Application of FSP process resulted in a decrease of the porosity in the modified material. The modified materials achieved at perpendicular runs can be characterized by the higher dislocation density that obtained at parallel ones. The multi-run FSP process caused increase the elongation and ultimate tensile strength of modified material in comparison to properties of the cast aluminum alloy.

You might also be interested in these eBooks

Info:

Periodical:

Key Engineering Materials (Volumes 611-612)

Pages:

1595-1600

Citation:

Online since:

May 2014

Export:

Price:

* - Corresponding Author

[1] Z.Y. Ma, S.R. Sharma, R.S. Mishra, Effect of friction stir processing on the microstructure of cast A356 aluminum, Materials Science and Engineering A 433 (2006) 269–278.

DOI: 10.1016/j.msea.2006.06.099

Google Scholar

[2] Z.Y. Ma, S.R. Sharma, R.S. Mishra, Effect of multiple-pass friction stir processing on microstructure and tensile properties of a cast aluminum–silicon alloy, Scripta Materialia 54 (2006) 1623–1626.

DOI: 10.1016/j.scriptamat.2006.01.010

Google Scholar

[3] K. Surekha, B.S. Murty, K. Prasad Rao, Microstructural characterization and corrosion behavior of multipass friction stir processed AA2219 aluminium alloy, Surface & Coatings Technology 202 (2008) 4057–4068.

DOI: 10.1016/j.surfcoat.2008.02.001

Google Scholar

[4] K.J. Al-Fadhalah, A.I. Almazrouee, A.S. Aloraier, Microstructure and mechanical properties of multi-pass friction stir processed aluminum alloy 6063, Materials and Design 53 (2014) 550–560.

DOI: 10.1016/j.matdes.2013.07.062

Google Scholar

[5] S. Pradeep, V. Pancholi, Effect of microstructural inhomogeneity on superplastic behaviour of multipass friction stir processed aluminium alloy, Materials Science & Engineering A 561 (2013) 78–87.

DOI: 10.1016/j.msea.2012.10.050

Google Scholar

[6] C.H. Chuang, J.C. Huang, P.J. Hsieh, Using friction stir processing to fabricate MgAlZn intermetallic alloys, Scripta Materialia 53 (2005) 1455-1460.

DOI: 10.1016/j.scriptamat.2005.08.019

Google Scholar

[7] L.B. Johannes, R.S. Mishra, Multiple passes of friction stir processing for the creation of superplastic 7075 aluminum, Materials Science and Engineering A 464 (2007) 255–260.

DOI: 10.1016/j.msea.2007.01.141

Google Scholar

[8] P. Xue, B.I. Xiao, Z.Y. Ma, Achieving Large-area Bulk Ultrafine Grained Cu via Submerged Multiple-pass Friction Stir Processing, Journal of Materials Science & Technology 29 (2013) 1111–1115.

DOI: 10.1016/j.jmst.2013.09.021

Google Scholar

[9] F.Y. Zheng, Y.J. Wu, L.M. Peng, X.W. Li, P.H. Fu, W.J. Ding, Microstructures and mechanical properties of friction stir processed Mg–2. 0Nd–0. 3Zn–1. 0Zr magnesium alloy, Journal of Magnesium and Alloys 1 (2013) 122-127.

DOI: 10.1016/j.jma.2013.06.001

Google Scholar

[10] Li B., Shen Y., Hu W., Surface nitriding on Ti–6Al–4V alloy via friction stir processing method under nitrogen atmosphere, Applied Surface Science 274 (2013) 356–364.

DOI: 10.1016/j.apsusc.2013.03.060

Google Scholar

[11] M. Kopyscianski, M. St. Weglowski, A. Pietras, A. Weglowska, C. Hamilton, S. Dymek, Friction Stir Processing as a fabricating route of dispersion strengthened aluminum alloy, Materials Engineering 194 (2013) 303-305.

Google Scholar

[12] K. Nakata, Y.G. Kima, H. Fujii, T. Tsumura, T. Komazak, Improvement of mechanical properties of aluminum die casting alloy by multi-pass friction stir processing, Materials Science and Engineering A 437 (2006) 274–280.

DOI: 10.1016/j.msea.2006.07.150

Google Scholar

[13] T.S. Mahmoud, Surface modification of A390 hypereutectic Al–Si cast alloys using friction stir processing, Surface & Coatings Technology 228 (2013) 209–220.

DOI: 10.1016/j.surfcoat.2013.04.031

Google Scholar

[14] M. Łągiewka, Z. Konopka , A. Zyska, M. Nadolski, The influence of modification on the flow and the solidification of AlSi10Mg alloy, Archives of Foundry Engineering 10 (2010) 119-122.

DOI: 10.2478/afe-2014-0036

Google Scholar

[15] T. Lipiński, Improvement of mechanical properties of AlSi7Mg alloy with fast cooling homogenous modifier, Archives of Foundry Engineering 8 (2008) 85-88.

Google Scholar

[16] L. Karthikeyan, V.S. Senthilkumar, V. Balasubramanian, S. Natarajan, Mechanical property and microstructural changes during friction stir processing of cast aluminum 2285 alloy, Material and Design 30 (2009) 2237–2242. 3.

DOI: 10.1016/j.matdes.2008.09.006

Google Scholar