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Processing/microstructure/mechanical property relationships in iron aluminum zirconium boron with and without an oxide dispersion

Strothers, Susan Diane Hlavin
http://rave.ohiolink.edu/etdc/view?acc_num=case1055341996

Abstract Details

1991, Doctor of Philosophy, Case Western Reserve University, Materials Science and Engineering.
The effect of powder and processing variables on the microstructure of an extruded FeAlZrB alloy has been investigated. Results shows that the key parameters in microstructural development are extrusion temperature and powder particle size. In addition to powder and processing variables, the effect of a 1 vol% Y2O3 dispersion was investigated. The microstructure of this material was very fine grained. By manipulating powder and processing parameters and heat treatments, a very large range of microstructures were obtained. This enabled an evaluation of the role of microstructure and grain size on the room temperature and elevated temperature mechanical behavior of this alloy. Room temperature tensile data of the as extruded materials revealed that those with the finer grains had the highest yield and ultimate tensile strengths as well as elongation. The effect of heat treatments and cooling rates on tensile behavior was also investigated. At 1100K the coarse grained materials exhibited larger yields strengths in tension with the exception of the very fine grained oxide dispersion strengthened extrusions. These had the highest yields strengths despite their fine grain sizes. The oxide dispersion strengthened alloys also showed the grea test compression creep resistance at 1100K even when heat treated to large grain sizes. The mechanical behavior of these alloys at room and high temperature will be discussed in terms of microstructural characteristics such as grain size, dispersoid size and type, and crystallographic orientation.
Krishna Vedula (Advisor)
213 p.
Engineering, Metallurgy
Processing; microstructure; mechanical; relationships; iron aluminum zirconium boron; oxide dispersion

Recommended Citations

Citations

  • Strothers, S. D. H. (1991). Processing/microstructure/mechanical property relationships in iron aluminum zirconium boron with and without an oxide dispersion [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1055341996

    APA Style (7th edition)

  • Strothers, Susan. Processing/microstructure/mechanical property relationships in iron aluminum zirconium boron with and without an oxide dispersion. 1991. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1055341996.

    MLA Style (8th edition)

  • Strothers, Susan. "Processing/microstructure/mechanical property relationships in iron aluminum zirconium boron with and without an oxide dispersion." Doctoral dissertation, Case Western Reserve University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=case1055341996

    Chicago Manual of Style (17th edition)

case1055341996
665
© 1991, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.