Abstract
Continuous CO2 laser welding of an Fe-Cu dissimilar couple in a butt-weld geometry at different process conditions is studied. The process conditions are varied to identify and characterize the microstructural features that are independent of the welding mode. The study presents a characterization of the microstructure and mechanical properties of the welds. Detailed microstructural analysis of the weld/base-metal interface shows features that are different on the two sides of the weld. The iron side can grow into the weld with a local change in length scale, whereas the interface on the copper side indicates a barrier to growth. The interface is jagged, and a banded microstructure consisting of iron-rich layers could be observed next to the weld/Cu interface. The observations suggest that solidification initiates inside the melt, where iron and copper are mixed due to convective flow. The transmission electron microscopy (TEM) of the weld region also indicates the occasional presence of droplets of iron and copper. The microstructural observations are rationalized using arguments drawn from a thermodynamic analysis of the Fe-Cu system.
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References
W.M. Steen: Laser Material Processing, Springer-Verlag, New York, NY, 1991.
W. Duley: Laser Welding, John Wiley & Sons Inc., New York, NY, 1999.
P.S. Wei and F.K. Chung: Trans. ASME: J. Heat Transfer, 1997, vol. 119, p. 832.
P.J. Blakeley and A. Sanderson: Welding J., 1984, vol. 63, pp. 42–49.
P.S. Wei and Chih-Wei Wen: Metall. Mater. Trans. B, 2002, vol. 33B, pp. 765–73.
O.K. Nazarenko: Avt. Svarka, 1982, No. 1, pp. 33–39.
S.A. David and J.M. Vitek: Int. Mater. Rev., 1989, vol. 34, pp. 213–45.
T. Zachariah, S.A. David, J.M. Vitek, and T. Debroy: Welding Res. Suppl., 1989, Dec., pp. 499s–509s.
T. Zachariah, S.A. David, J.M. Vitek, and T. Debroy: Welding Res. Suppl., 1989, Dec., pp. 510s–519s.
Z. Sun and J.C. Ion: J. Mater. Sci., 1995, vol. 30, pp. 4205–15.
J. Seretsky and E.R. Ryba: Welding Res. Suppl., 1976, July, pp. 208s–211s.
G. Metzger and R. Lison: Welding Res. Suppl., 1976, Aug., pp. 230s–240s.
B. Majumdar, R. Galun, A. Weisheit, and B.L. Mordike: J. Mater. Sci., 1997, vol. 32, pp. 6191–6200.
P.S. Wei, Y.K. Kuo, and J.S. Ku: J. Heat Transfer-Trans. ASME, 2000, vol. 122, pp. 626–31.
Z. Li and G. Fontana: J. Mater. Processing Technol., 1998, vol. 74, pp. 174–82.
A.C. Lingenfelter: Proc. Laser Advanced Materials Processing, High Temperature Society of Japan, Welding Research Institute of Osaka University, Mihogaoka, Ibaraki, Osaka, Japan, 1987, pp. 211–16.
Gandham Phanikumar: Ph.D. Thesis, Indian Institute of Science, Bangalore, 2002.
G. Phanikumar, K. Chattopadhyay, and P. Dutta: Int. J. Numer. Methods Heat Fluid Flow, 2001, vol. 11 (2), pp. 156–71.
G. Phanikumar, P. Dutta, and K. Chattopadhyay: Metall. Mater. Trans. B, 2004, vol. 35B, pp. 339–50.
F.K. Chung and P.S. Wei: J. Heat Transfer-Trans. ASME, 1999, vol. 121, pp. 451–61.
P.S. Wei and F.K. Chung: Metall. Mater. Trans. B, 2000, vol. 31B, pp. 1387–1403.
Binary Alloy Phase Diagrams, T.B. Massalski, ed., ASM, Metals Park, OH, 1980.
S.P. Elder and G.S. Abaschian: Proc. Principle of Solidification and Materials Processing, R. Trivedi, J.A. Sekhar, and J. Mazumdar, eds., Oxford and IBH Publishing Co Ltd., New Delhi, 1989, vol. 1, pp. 1–299.
Y. Chuang, R. Schmid, and Y.A. Chang: Metall. Trans. A, 1984, vol. 15A, p. 1921.
Bhaskar Majumdar: Ph.D. Thesis, Indian Institute of Science, Bangalore, 1995.
A. Munitz: Metall. Trans. B, 1987, vol. 18B, pp. 565–75.
K.K. Prashanth, J. Mazumder, and K. Chattopadhyay: J. Mater. Sci., 1999, vol. 34, pp. 3437–45.
K.S. Kumar, G. Phanikumar, P. Dutta, and K. Chattopadhyay: J. Mater. Sci., 2002, vol. 37, pp. 2345–49.
M. Zimmermann, M. Carrard, and W. Kurz: Acta Metall., 1989, vol. 37, pp. 3305–13.
D.M. Herlach: Mater. Sci. Eng., 1994, vol. R12 (4–5), pp. 177–272.
Q. Chen and Z. Jin: Metall. Mater. Trans. A, 1995, vol. 26A, pp. 417–26.
S.A. David, J.M. Vitek, M. Rappaz, and L.A. Boatner: Metall. Mater. Trans. A, 1990, vol. 21A, pp. 1767–82.
P.S. Mohanty and J. Mazumder: Metall. Mater. Trans. B, 1998, vol. 29B, pp. 1269–79.
Billi and Trivedi: in Handbook of Crystal Growth, D.T.J. Hurle, ed., Elsevier, Amsterdam, 1993, vol. 1b, p. 899.
G. Wilde and J.H. Perepezko: Acta Mater., 1999, vol. 47 (10), pp. 3009–21.
X.Y. Lu, C.D. Cao, and B. Wei: Mater. Sci. Eng. A, 2001, vol. 313, pp. 198–206.
P.H. Shingu, K.N. Ishihara, A. Otsuki, and I. Daigo: Mater. Sci. Eng. A, 2001, vols. 304–306 (1–2), pp. 399–402.
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Phanikumar, G., Manjini, S., Dutta, P. et al. Characterization of a continuous CO2 laser-welded Fe-Cu dissimilar couple. Metall Mater Trans A 36, 2137–2147 (2005). https://doi.org/10.1007/s11661-005-0334-6
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DOI: https://doi.org/10.1007/s11661-005-0334-6