Fe<sub>20</sub>Co<sub>20</sub>Ni<sub>20</sub>Cr<sub>20</sub>B<sub>20-<i>x</i></sub>Si<sub><i>x</i></sub>ハイエントロピー合金の形成相に及ぼす冷却速度の影響と加熱による相変態挙動

DOI Web Site 被引用文献2件

書誌事項

タイトル別名
  • Effect of Cooling Rate on Phase Formation and Phase Transformation Behavior During Heating in Fe<sub>20</sub>Co<sub>20</sub>Ni<sub>20</sub>Cr<sub>20</sub>B<sub>20-<i>x</i></sub>Si<sub><i>x</i></sub> High-Entropy Alloys
  • Fe₂₀Co₂₀Ni₂₀Cr₂₀B[20-x]Si[x]ハイエントロピー合金の形成相に及ぼす冷却速度の影響と加熱による相変態挙動
  • Fe ₂ ₀ Co ₂ ₀ Ni ₂ ₀ Cr ₂ ₀ B[20-x]Si[x]ハイエントロピー ゴウキン ノ ケイセイソウ ニ オヨボス レイキャク ソクド ノ エイキョウ ト カネツ ニ ヨル ソウヘンタイ キョドウ

この論文をさがす

抄録

<p>  In this study, to obtain knowledge on the phase formation and its stability in Fe20Co20Ni20Cr20B20-xSix high-entropy alloys, the effect of the cooling rate during solidification on the phase formation and the phase change during heating were investigated. Fe20Co20Ni20Cr20B20-xSix alloys were prepared by high-frequency induction melting and the single-roller melt spinning method. The phases formed in each alloy and their phase transformation behavior were investigated by X-ray diffraction (XRD) measurements, scanning electron microscopy with energy-dispersive X-ray spectroscopy, and differential scanning calorimetry (DSC). The results show that the induction-melted alloys were composed of mainly the FCC phase with trace amounts of Cr2B and Cr3Ni5Si2, and that the amount of Cr2B decreased and the amount of Cr3Ni5Si2 increased with increasing Si content. In the rapidly solidified alloy prepared at a rate of 7440℃/s, it was found that the FCC phase was mainly formed in the alloy samples with a B content above 12.5 at.%. In contrast, trace amounts of Cr2B and Cr3Ni5Si2 were formed in addition to the FCC phase in alloy samples with a B content below 10 at.%. The DSC and XRD measurements showed that the alloy solidified at a rate of 7440℃/s exhibited no phase transformation up to 700℃ and remained mostly the FCC phase. In the rapidly solidified alloy prepared at a rate of 2.4 × 105℃/s, it was clarified that the almost amorphous phase was formed in all alloy samples except for that with a B content of 5 at.%. The amorphous phase first transformed into the BCC phase as the temperature rose and then transformed into the FCC phase with a further increase in temperature. The results show that the presented phase transformation behavior roughly corresponds to the results obtained from thermodynamic equilibrium calculations.</p>

収録刊行物

  • 鋳造工学

    鋳造工学 93 (9), 532-540, 2021-09-25

    公益社団法人 日本鋳造工学会

被引用文献 (2)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ