Investigation using 4D-CT of massive-like transformation from the δ to γ phase during and after δ-solidification in carbon steels

Hideyuki Yasuda, Takahiro Hashimoto, Naoki Sei, Kohei Morishita, Masato Yoshiya

研究成果: Contribution to journalConference article査読

5 被引用数 (Scopus)

抄録

For a long time, the γ phase in metallic alloys has seemed to be produced through a peritectic reaction between the δ and liquid phases. However, direct observations have shown that a massive-like transformation, in which the δ phase transforms into the γ phase in the solid state, is dominant during or after solidification of the δ phase in carbon steels. To characterize such massive-like transformation, we use time-resolved tomography (4D-CT) to demonstrate the volume change during cooling from the melt and the crystallographic orientation relationship between the δ and γ phases. The volume changes from solidification and from the massive-like transformation from the δ to the γ phase were -3% and -0.5%, respectively. The transformation from the δ to the γ phase finished quickly, as demonstrated by the volume change. Fine γ grains were produced even in a single δ grain through the massive-like transformation. Also, the refined γ grains showed a wide crystallographic distribution.

本文言語英語
論文番号012013
ジャーナルIOP Conference Series: Materials Science and Engineering
529
1
DOI
出版ステータス出版済み - 6 17 2019
外部発表はい
イベントJoint 5th International Conference on Advances in Solidification Processes, ICASP 2019 and 5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining, CSSCR 2019 - Salzburg, オーストリア
継続期間: 6 17 20196 21 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

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