Effect of oxide species and thermomechanical treatments on the strength properties of mechanically alloyed Fe-17%Cr ferritic ODS materials

Kim, Ick Soo; Okuda, Takanari; Kang, Chang Yong; Sung, J.H.; Maziasz, P.J.; Klueh, R.L.; Miyahara, Kazuya

doi:10.1007/bf03028092

Cited by 18 publications

(11 citation statements)

References 7 publications

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“…On the other hand, it was reported that the dispersion of Y 2 O 3 particles in a tungsten matrix enhances the high temperature strength and creep resistance [6][7][8]. Moreover, in contrast to ThO 2 or La 2 O 3 , it does not represent any hazardous effects.…”

Section: Introductionmentioning

confidence: 96%

The effect of yttrium oxide on the sintering behavior and hardness of tungsten

et al. 2006

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In this study, the relative density and hardness of Y2O3 dispersed tungsten alloy were investigated as functions of the Y2O3 content and sintering temperature. The sintering temperature and the amount of the second phase were varied from 1800 to 2500 o C and 0 to 2.0 weight pct, respectively. The relative density of the alloys is higher than that of pure tungsten in the range from 2000 to 2500 o C, whereas the density is lower at 1800 o C. As the Y2O3 content increases, the sintered density increases at a given temperature. The transition temperature (Ttr), where the relative density of the alloys exceeds that of pure tungsten, is reduced with increased Y2O3 particle content. In order to examine the effect of the second phase on the mechanical property, the hardness of pure tungsten and the alloys are measured. The hardness is mainly dependent upon the relative density of the alloys, rather than the amount of the second phase and tungsten grain size. The relationship between hardness and density is discussed according to the plasticity theory of porous materials.

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Section: Introductionmentioning

confidence: 96%

The effect of yttrium oxide on the sintering behavior and hardness of tungsten

et al. 2006

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“…Some mechanically alloyed (MA), oxide dispersion strengthened (ODS) ferritic alloys fabricated from powders of a prealloyed mixture of iron, chromium, yttrium, titanium, and tungsten and yttria have exhibited dramatically improved high temperature creep properties at temperatures of up to 850 8C [1][2][3][4][5][6][7][8][9][10][11][12]. This temperature is significantly higher than the traditionally accepted operating range of ferritic alloys.…”

Section: Introductionmentioning

confidence: 99%

Stability of ferritic MA/ODS alloys at high temperatures

et al. 2005

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“…In previous researches, [10][11] the authors have investigated the effects of types and sizes of oxides, thermomechanical treatments, and matrix structure on the mechanical properties of Fe-17%Cr ferritic alloy. Among the oxides, Y 2 O 3 particles were found to be the finest in size and uniform in dispersion.…”

Section: Introductionmentioning

confidence: 99%