Iron–Aluminium-Base Alloys with Strengthening Laves Phase for Structural Applications at High Temperatures

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Fe-Al-Ta alloys with the ternary Laves phase Ta(Fe0.5+x, Al0.5-x)2 are studied experimentally with the objective of clarifying the effect of Laves phase precipitation and atomic ordering on the deformation characteristics of such Fe-Al-base alloys. The present study concentrates on the hardening effect of the Laves phase in ordered and disordered Fe-Al-Ta alloys with Al contents between 16 and 45 at.% showing the A2 disorder or the DO3 or B2 order. Ta has a low solubility in Fe-Al alloys which is beneficial for slowing down precipitate coarsening. Small amounts of Laves phase together with atomic ordering increase the yield stress and affect ductility in a complex way. The alloys with 1% Ta exhibit a high oxidation resistance. The continuing work aims at adjusting the Al and Ta content for an optimum relation of high-temperature strength and low-temperature ductility with maintaining a sufficient oxidation resistance.

Info:

Periodical:

Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie

Pages:

865-868

DOI:

10.4028/www.scientific.net/MSF.475-479.865

Citation:

D.D. Risanti and G. Sauthoff, "Iron–Aluminium-Base Alloys with Strengthening Laves Phase for Structural Applications at High Temperatures", Materials Science Forum, Vols. 475-479, pp. 865-868, 2005

Online since:

January 2005

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$35.00

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