Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-06T12:25:09.931Z Has data issue: false hasContentIssue false
  • English
  • Français

The Microstructure and Tensile Properties of Extruded Melt-Spun Ribbons of Iron-Rich B2 FeAl

Published online by Cambridge University Press:  28 February 2011

I. Baker  and
D.J. Gaydosh
I. Baker
Affiliation:
Thayer School of Engineering, Dartmouth College, Hanover, NH 03755
D.J. Gaydosh
Affiliation:
NASA-Lewis Research Center, Cleveland, Ohio 44135
Get access

Abstract

The microstructure of extruded rods of iron-rich FeAl (B2-structure), as characterized by TEM, SEM, optical microscopy and x-ray diffractometry, consisted of elongated grains with a <111> fibre texture containing a high dislocation density. Numerous oxide particles were found, mostly in lines which reflected the matrix flow during extrusion. In addition, some large inclusions were present. Tensile testing of annealed, relatively dislocation-free specimens as a function of increasing temperature found increasing ductility up to 900K, above which a ductility drop occurred accompanied by a change in fracture mode, from transgranular cleavage to intergranular fracture. The yield strength, which was independent of temperature up to 800K (at ∼500MPa), also decreased rapidly as diffusion became more important. The predominant slip vector changed from <111> to <100> around 700K

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 81: Symposium H – High-Temperature Ordered Intermetallic Alloys II , 1986 , 315
Copyright
Copyright © Materials Research Society 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Sainfort, G., Mouturat, P., Pepin, P., Petit, J., Cabane, G. and Salesse, M., Mem. Sci. Rev. Met. 60(1963) 125 Google Scholar
2. Mendiratta, M.G., Ehlers, S.K., Chatterjee, D.K. and Lipsett, H.A., in Rapid Solidification Processing-Materials and Technologies III, Ed. Mehrabian, R., NBS, Gaithersburg, MD,1982, p 240 Google Scholar
3. Baker, I. and Schulson, E.M., Met. Trans.A 15A (1984) 1129 Google Scholar
4. Baker, I. and Gaydosh, D J, Phys. Stat. Sol. (a) 96 (1986) 185 Google Scholar
5. Umakoshi, Y. and Yamaguchi, M., Phil. Mag. A 41 (1980) 573 Google Scholar
6. Yamagata, T. and Yoshida, H., Mat. Sci. Eng. 12 (1973) 95 Google Scholar
7. Yamagata, T., Trans. Japan. Inst. Metals 18 (1977) 715 Google Scholar
8. Umakoshi, Y. and Yamaguchi, M., Phil. Mag. A 44 (1981) 711 Google Scholar
9. Mendiratta, M.G., Min, H.-M. and Lipsett, H.A., Metall. Trans. A 15A (1984) 395 Google Scholar
10. Groves, G.W. and Kelly, A., Phil. Mag. 8 (1963) 877 Google Scholar
11. Mises, R. Von, Angew, Z.. Math. Mech. 8 (1928) 161 Google Scholar
12. Johnston, T.L., Davies, R.G., and Stoloff, N.S., Phil. Mag. 12 (1965) 305 Google Scholar
13. Groves, G.W. and Kelly, A., Phil. Mag. 19 (1969) 977 Google Scholar
14. Dieter, G.E., Mechanical Metallurgy, McGraw-Hill, New York, 1961, p 345 Google Scholar