Abstract
Conventional arc-welding of MA 754, an oxide dispersion-strengthened (ODS) superalloy, poses two significant problems: agglomeration of dispersoids and weld solidification grain boundaries perpendicular to the rolled direction, both of which reduce the high-temperature creep and stress rupture properties. In the present work, laser welding of MA 754 alloy was conducted to determine the effects of a high energy density source on the microstructure and mechanical properties of a 3.2 mm thick butt joint. Tungsten-inert-gas (TIG) welding was also studied for comparison purpose. X-ray diffraction, optical microscopy and scanning electron microscopy analysis coupled with tensile, hardness and hot corrosion tests were used to evaluate the performance of weldments. Results indicated the absence of dispersoid agglomeration and superior tensile and corrosion properties of laser weldments over arc welds. The properties of laser weldments are comparable to those of wrought MA 754.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
G. H. Gessinger and R. F. Singer, in “Powder Metallurgy of Superalloys”, edited by G. H. Gessinger (Butterworths, London, 1984) pp. 213–292.
J. S. Benjamin and M. J. Bomford, Metall. Trans. 5 (1974) 615.
J. S. Benjamin, ibid. 1 (1970) 2943.
“Alloy Digest” (Inco Alloys International, London, 1978) Ni-244.
“Inco Map” (Inco Alloys International, London, 1978) G1-Cr1.
P. S. Gilman, Progr. Powder Metall. 41 (1985) 455.
R. C. Benn, in “Micon 86: Optimization of Processing, Properties, and Service Performance Through Microstructural Control”, edited by B. L. Bramfitt, R. C. Benn, C. R. Brinkman and G. F. Vander Voort (American Society for Testing and Materials, Philadelphia, 1988) pp. 237–246.
L. E. Shoemaker, in “Advances in Welding Science and Technology”, edited by S. A. David (American Society for Metals, Gatlinburg, TN, 1986) pp. 371–377.
T. J. Kelly, “Trends in Welding Research”, edited by S. A. David (American Society for Metals, Philadelphia, 1981) pp. 471–487.
B. Jahnke, in “High Temperature Alloys for Gas Turbines and Other Applications I”, edited by W. Betz, R. Brunetaud, D. Cousouradis, H. Fishmeister, T. B. Gibbons, I. Kvernes, Y. Lindblom, J. B. Marriott and D. B. Meadowcroft (D. Reidel, Brussels, 1986) pp. 176–216.
T. J. Kelly, in Proceedings of Symposium on Laser-Solid Interactions and Laser Processing, Boston, December 1978, Materials Research Society, pp. 215–220.
P. Steinmetz, C. Duret and R. Morbioli, Mater. Sci. Technol. 2 (1986) 262.
T. J. Kelly, in “Frontiers of High Temperature Material I”, edited by G. A. Mock (Inco Alloys International, London, 1981) pp. 267–272.
J. Stringer, B. A. Wilcox and R. I. Jaffee, Oxid. Met. 5 (1972) 11.
P. Huber and G. H. Gessinger, “Materials and Coatings to Resist High Temperature Corrosion” (Applied Science, London, 1978) p. 71.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Molian, P.A., Yang, Y.M. & Patnaik, P.C. Laser welding of oxide dispersion-strengthened alloy MA754. J Mater Sci 27, 2687–2694 (1992). https://doi.org/10.1007/BF00540691
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00540691