Friction stir welding effect on transverse rigidity and sound transmission characteristics of AZ31B magnesium alloy

Abstract

AZ31B magnesium alloy was subjected to friction stir welding with various welding parameters. The equivalent Young’s moduli of the friction stir welded samples and the base material were obtained by the three-point method, and their transverse rigidities were obtained as well. Furthermore, the sound transmission characteristics of those samples were experimentally studied by four-microphone impedance tube method. The experimental results indicate that the transverse rigidities of the friction stir welded samples were only 79%, 83% and 92% of those of the base material, respectively. The sound transmission losses of the processed samples were also lower, which was largely due to the reduction of transverse rigidities induced by the decrease of equivalent Young’s moduli.

Keywords

AZ31B magnesium alloy / friction stir welding / transverse rigidity / sound transmission loss

References

[1] Kulekci M K. Magnesium and its alloys applications in automotive industry[J]. The International Journal of Advanced Manufacturing Technology, 2008, 39(9/10): 851-865.

[2] Friedrich H, Schumann S. Research for a “new age of magnesium” in the automotive industry[J]. Journal of Materials Processing Technology, 2001, 117(3): 276-281.

[3] Tang Y M, Zhao X H, Jiang K S, et al. The influences of duty cycle on the bonding strength of AZ31B magnesium alloy by microarc oxidation treatment[J]. Surface and Coatings Technology, 2010, 205(6): 1789-1792.

[4] Gu X N, Zheng Y F, Cheng Y, et al. In vitro corrosion and biocompatibility of binary magnesium alloys[J]. Biomaterials, 2009, 30(4): 484-498.

[5] Hänzi A C, Gerber I, Schinhammer M, et al. On the in vitro and in vivo degradation performance and biological response of new biodegradable Mg-Y-Zn alloys[J]. Acta Biomaterialia, 2010, 6(5): 1824-1833.

[6] Zhang S X, Zhang X N, Zhao C L, et al. Research on an Mg-Zn alloy as a degradable biomaterial[J]. Acta Biomaterialia, 2010, 6(2): 626-640.

[7] Wang Y M, Guo J W, Shao Z K, et al. A metasilicate-based ceramic coating formed on magnesium alloy by microarc oxidation and its corrosion in simulated body fluid[J]. Surface & Coatings Technology, 2013, 219: 8-14.

[8] Zhou L, Nakata K, Liao J, et al. Microstructural characteristics and mechanical properties of non-combustive Mg-9Al-Zn-Ca magnesium alloy friction stir welded joints[J]. Materials and Design, 2012, 42: 505-512.

[9] Thomas W M, Nicholas E D, Needham J C, et al. Friction-Stir Butt Welding: UK, 1991.

[10] Mishra R S, Ma Z Y. Friction stir welding and processing[J]. Materials Science and Engineering R, 2005, 50(1/2): 1-78.

[11] Nandan R, DebRoy T, Bhadeshia H K D H. Recent advances in friction-stir welding — Process, weldment structure and properties[J]. Progress in Materials Science, 2008, 53(6): 980-1023.

[12] Simar A, Bréchet Y, de Meester B, et al. Integrated modeling of friction stir welding of 6xxx series Al alloys: Process, microstructure and properties[J]. Progress in Materials Science, 2012, 57(1): 95-183.

[13] Commin L, Dumont M, Masse J E, et al. Friction stir welding of AZ31 magnesium alloy rolled sheets: Influence of processing parameters[J]. Acta Materialia, 2009, 57(2): 326-334.

[14] Woo W, Choo H, Prime M B, et al. Microstructure, texture and residual stress in a friction-stir-processed AZ31B magnesium alloy[J]. Acta Materialia, 2008, 56(8): 1701-1711.

[15] Esparza J A, Davis W C, Trillo E A, et al. Friction-stir welding of magnesium alloy AZ31B[J]. Journal of Materials Science Letters, 2002, 21(12): 917-920.

[16] Xin R L, Liu D J, Li B, et al. Mechanisms of fracture and inhomogeneous deformation on transverse tensile test of friction-stir-processed AZ31 Mg alloy[J]. Materials Science and Engineering: A, 2013, 565: 333-341.

[17] Bassali W A. The transverse flexure of thin elastic plates supported at several points[J]. Proceedings of the Cambridge Philosophic Society, 1957, 53: 728-743.

[18] Nunes J P, Pouzada A S, Bernardo C A. The use of a three-point support flexural test to predict the stiffness of anisotropic composite plates in bending[J]. Polymer Testing, 2002, 21(1): 27-33.

[19] Singh K V, Hamilton C, Dymek S. Developing predictive tools for friction stir weld quality assessment[J]. Science and Technology of Welding and Joining, 2010, 15(2): 142-148.

[20] Gharacheh M A, Kokabi A H, Daneshi G H, et al. The influence of the ratio of “rotational speed/traverse speed” (w/v) on mechanical properties of AZ31 friction stir welds[J]. International Journal of Machine Tools and Manufacture, 2006, 46(15): 1983-1987.

[21] Zhang H, Lin S B, Wu L, et al. Defects formation procedure and mathematic model for defect free friction stir welding of magnesium alloy[J]. Materials and Design, 2006, 27(9): 805-809.

[22] Chen Y C, Nakata K. Friction stir lap joining aluminum and magnesium alloys[J]. Scripta Materialia, 2008, 58(6): 433-436.

[23] Chen C M, Kovacevic R. Finite element modeling of friction stir welding—Thermal and thermomechanical analysis[J]. International Journal of Machine Tools and Manufacture, 2003, 43(13): 1319-1326.

[24] Yacoubou S, Raymond P. A general wave decomposition formula for the measurement of normal incidence sound transmission loss in impedance tube[J]. The Journal of the Acoustical Society of America, 2009, 125(4): 2083-2090.

[25] Lee C M, Xu Y. A modified transfer matrix method for prediction of transmission loss of multilayer acoustic materials[J]. Journal of Sound and Vibration, 2009, 326(1/2): 290-301.