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Microstructural evolution of MgAl2O4 oxide-dispersion-strengthened alloy by mechanical milling and hot isostatic pressing

  • Lei Dai (a1), Yongchang Liu (a2), Ping Feng (a3) and Jun Zhao (a3)

Oxide-dispersion-strengthened (ODS) ferritic alloys are fascinating materials for future high temperature energy production technologies. MgAl2O4 ODS alloy incorporating nanoscale oxide particles were produced by mechanical milling (MM) followed by hot isostatic pressing (HIP). The MgAl2O4 nanoscale oxide particles were formed during the HIP process by the addition of MgO and Al2O3 to the Fe–Cr matrix. Microstructural evolution of ODS alloys was structurally characterized at each step of the elaboration processes by means of scanning electron microscope (SEM), transmission electron microscope (TEM), and x-ray diffraction (XRD). The observations of structure of the mixed powders in ODS alloys after MM indicated that the initial powders, coupled with the original MgO and Al2O3 powders, got fractured by severe plastic deformation and ultrafine bcc grains (∼17 nm) of the matrix and amorphous phase composed of Mg, Al, and O were formed during MM. The main driving force for the formation of amorphous phase comes from the increase of volume fraction of bcc Fe grain boundary and the increase of interfacial energy due to the decrease in the size of MgO and Al2O3 powders. The MgAl2O4 nanoscale oxide particles formed at 1173 K which was far below the traditional sintering temperature of the raw material. And the structures of MgAl2O4 nanoscale oxide particles were observed by TEM.

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1. Noh S., Kasada R., and Kimura A.: Solid-state diffusion bonding of high-Cr ODS ferritic steel. Acta Mater. 59, 3196 (2011).
2. Hadraba H., Fournier B., Stratil L., Malaplate J., Rouffié A-L., Wident P., Ziolek L., and Béchade J-L.: Influence of microstructure on impact properties on 9-18Cr ODS steels for fusion/fission applications. J. Nucl. Mater. 411, 112 (2011).
3. Klimenkov M.: Quantitative measurement of argon inside of nano-sized bubbles in ODS steels. J. Nucl. Mater. 411, 160 (2011).
4. Ribis J. and de Carlan Y.: Interfacial strained structure and orientation relationships of the nanosized oxide particles deduced from elasticity-driven morphology in oxide dispersion strengthened materials. Acta Mater. 60, 238 (2012).
5. Tanelke M., Abe F., and Sawada K.: Creep-strengthening of steel at high temperatures using nano-sized carbonitride dispersions. Nature 424, 294 (2003).
6. Kimura K.: Assessment of long-term creep strength and review of allowable stress of high Cr ferritic creep resistant steels. ASME Pressure Vessels and Piping Division Conference, 2005; 18.
7. Hin C. and Wirth B.D.: Formation of Y2O3 nanoclusters in nano-structured ferritic alloys: Modeling of precipitation kinetics and yield strength. J. Nucl. Mater. 402, 30 (2010).
8. Lescoat M-L., Monnet I., Ribis J., Dubuisson P., de Carlan Y., Costantini J-M., and Malaplate J.: Amorphization of oxides in ODS materials under low and high energy ion irradiations. J. Nucl. Mater. 417, 266 (2010).
9. Lindau R., Möslang A., Schirra M., Schlossmacher P., and Klimenkov M.: Mechanical and microstructural properties of a hipped RAFM ODS-steel. J. Nucl. Mater. 307311, 769 (2002).
10. Hsiung L.L., Fluss M.J., Tumey S.J., Choi B.W., Serruys Y., Willaime F., and Kimura A.: Formation mechanism and the role of nanoparticles in Fe-Cr ODS steels developed for radiation tolerance. Phys. Rev. B 82, 184103 (2010).
11. Ukai S., Mizuta S., and Fujiwara M.: Perspective of ODS alloys application in nuclear environments. J. Nucl. Mater. 307311, 749 (2002).
12. Kishimoto H., Kasada R., Hashitomi O., and Kimura A.: Stability of Y-Ti complex oxides in Fe-16Cr-0.1Ti ODS ferritic steel before and after heavy-ion irradiation. J. Nucl. Mater. 386388, 533 (2009).
13. Monnet I., Dubuisson P., Serruys Y., Ruault M.O., Kaïtasov O., and Jouffrey B.: Microstructural investigation of the stability under irradiation of oxide dispersion strengthened ferritic steels. J. Nucl. Mater. 335, 311 (2004).
14. Cayron C., Rath E., Chu I., and Launois S.: Microstructural evolution of Y2O3 and MgAl2O4 ODS EUROFER steels during their elaboration by mechanical milling and hot isostatic pressing. J. Nucl. Mater. 335, 83 (2004).
15. Danilchenko S.N., Kukharenko O.G., Moseke C., Protsenko I.Y., Sukhodubi L.F., and Sulkio-Cleff B.: Determination of the bone mineral crystallite size and lattice strain from diffraction line broadening. Cryst. Res. Technol. 37, 1234 (2002).
16. Jiang H.G., Rühle M., and Lavernia E.J.: On the applicability of the x-ray diffraction line profile analysis in extracting grain size and microstrain in nanocrystalline materials. J. Mater. Res. 14, 549559 (1999).
17. Dai L., Liu Y.C., and Dong Z.Z.: Size and structure evolution of yttria in ODS ferritic alloy powder during mechanical milling and subsequent annealing. Powder Technol. 217, 281 (2012).
18. Dai L., Liu Y.C. and Dong Z.Z., Yu L.M., and Ma Z.Q.: Microstructural evolution of oxide-dispersion-strengthened Fe–Cr model steels during mechanical milling and subsequent hot isostatic pressing. J. Mater. Sci. 48, 1826 (2013).
19. Hoogewijs R., Fiermans L., and Electron J.: Electronic relaxation processes in the KLL'auger spectra of the free magnesium atom, solid magnesium and MgO. J. Electron Spectrosc. Relat. Phenom. 11, 171 (1977).
20. Sugama T., Kukacka L.E., and Carciello N.: Study of interactions at water-soluble polymer/Ca (OH)2 or gibbsite interfaces by XPS. Cem. Concr. Res. 19, 857 (1989).
21. Chen C., Splinter S.J., Do T., and Mcintyre N.S.: Measurement of oxide film growth on Mg and Al surfaces over extended periods using XPS. Surf. Sci. 382, 652 (1997).
22. Di L.M. and Bakker H.: Mechanically induced phase transformation in the Nb3Au intermetallic compound. J. Phys.: Condens. Matter 3, 9319 (1991).
23. Koch C.C.: Research on metastable structure using high energy ball milling at North Carolina State University (overview). Mater. Trans., JIM 36, 85 (1995).
24. Capolungo L., Jochum C., Cherkaoui M., and Qu J.: Homogenization method for strength and inelastic behavior of nanocrystalline materials. Int. J. Plast. 21, 67 (2005).
25. Kimura Y., Takaki S., Suejima S., Uemor R., and Tamehiro H.: Ultra grain refining and decomposition of oxide during super-heavy deformation in oxide dispersion ferritic stainless steel powder. ISIJ Int. 39, 176 (1999).
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Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
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