Effect of the weld thermal cycles by the modified indirect electric arc (MIEA) on the mechanical properties of the AA6061-T6 alloy
DOI:
https://doi.org/10.3989/revmetalm.0801Keywords:
Aluminum alloy, Melted pool, Heat affected zone, Transformations, Overaging, Weld thermal cycleAbstract
Results of temperature measurements during welding of 12.7 mm thick AA6061-T6 alloy plates by modified indirect electric arc (MIEA) are presented. This study describes the thermal cycles of the heat affected zone (HAZ) and also in the fusion zone. Depending upon the position of the transducers, the maximum temperatures measured in the HAZ range from 308 to 693 °C, these measurements were related with the tensile test results, and the failure zone reported previously by the authors [1]. It was observed that, there is a decrease in the mechanical strength of the welded joints, due to the microstructural changes suffered by AA6061-T6 alloy in which formation of the β’ occurs according to the TTT transformation diagram. The inherent cooling conditions of the weld pool observed for the MIEA technique (only one pass of welding), have permitted to establish the characteristics of solidification and microstructure for a specific cooling rate.
Downloads
References
[1] R. R. Ambriz, G. Barrera y R. García, S&I 11 (2006) 10-17.
[2] V. Malin, Weld. J. 74 (1995) 305s-318s.
[3] Y. Li, L. E. Murr y J. C. Mc Clure, Mat. Sci. Eng. A 271 (1999) 213-223. doi:10.1016/S0921-5093(99)00204-X
[4] N. A. Anderson, Instrumentation for Process Measurement and Control., pp. 131-133.
[5] ASM, Heat Treater´s Guide: Nonferrous Alloys, p. 204.
[6] C. Huang y S. Kou, Weld. J. (2004) 111s-122s.
[7] O. R Myhr, O. Grong, H. G. Fjaer y C. D. Marioara, Acta Mater. 52 (2004) 4.997-5.008.
[8] M. J. Lu y S. Kou, Weld. J. (1989) 382-s-388-s.
[9] J. E. Hatch, Aluminum Properties and Physical Metallurgy, Ohio, 1993, pp. 134-148.
[10] G. J. Davies y J. G. Garland, Int. Metall. Rev. 20 (1975) 83-106.
[11] R. Garcia, V. H. Lopez, J. Mater. Sci. 42 (2006) 7856-7963.
[12] R. Garcia, V. H. Lopez, A. R. Kennedy y G. Arias, J. Mater. Sci. 42 (2007) 7794-7800. doi:10.1007/s10853-007-1632-8
[13] R. Garcia, V. H. Lopez, E. Bedolla y A. Manzano, J. Mater. Sci. Lett. 21 (2002) 1.965-1.967.
[14] R. Garcia, V. H. Lopez, E. Bedolla y A. Manzano, J. Mat. Sci. 38 (2003) 2.771-2.779.
[15] V. H. López. R. García y E. Bedolla, Metall. Mater. Trans. B (2002) 932-937.
[16] ASTM, Standard Test Methods of Tension Testing Wrought and Cast Aluminum-and Magnesium- Alloy Products [Metric], ASTM, 1994, pp. 419- 429.
[17] O. O. Grong, Metallurgical Modelling of Welding, The Institute of Materials, 1997, pp. 221-278.
[18] D. Rosenthal, Trans. ASME (1946) 849-866.
[19] T. Sheppard, Mater. Sci. Tech. 4 (1988) 636.
[20] I. Dutta y S. M. Allen, J. Mater. Sci. Lett. 10 (1991) 323-326. doi:10.1007/BF00719697
[21] A. O. Kluken y B. Bjorneklett, Weld. J. (1997) 39-44.
[22] L. A. Guiterrez, G. Neye y E. Zschech, Weld. J. (1996) 116s-121s.
[23] S. A. David y J. M. Vitek, Mat. Rev. 34 (1989) 213-245.
[24] W. Kurz y D. J. Fisher, Fundamentals of Solidification, Aedermannsdorf (Switzerland), 1989.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2009 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.
© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.