Phase transformation mechanism of Fe-Cu alloys

Yuuji Kimura, Setsuo Takaki

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Fe-(0.5-4)mass%Cu alloys were cooled from γ field under various cooling conditions (water-quenching, air-cooling, furnace-cooling) and phase transformation mechanisms were investigated by means of microstructural examinations and dilatometry. In all of the cooling conditions, hardness of Fe-Cu alloys becomes higher with increasing Cu content. Effect of cooling conditions on hardness tends to be significant in alloys with Cu more than 1 mass%. TEM observation shows that strength of alloys depends not only on a difference of matrix; martensite or ferrite, but also on dispersion of ε-Cu particles. In the case of air-cooling for an Fe-4mass%Cu alloy, the alloy undergoes preferentially γ→α massive transformation and then ε-Cu particles precipitates finely within the massive ferrite matrix. This leads to a large strengthening with a moderate ductility. Strength of Cu bearing steels can easily be controlled by varying cooling condition after a solution-treatment: Steels are soft enough to be deformed and machined after furnace-cooling, but strengthened after resolution-treatment followed by air-cooling.

Original languageEnglish
Pages (from-to)290-295
Number of pages6
JournalISIJ International
Volume37
Issue number3
Publication statusPublished - 1997

Fingerprint

Phase transitions
Cooling
Steel
Ferrite
Furnaces
Bearings (structural)
Air
Hardness
Ductility
Precipitates
Quenching
Martensite
Transmission electron microscopy
Water

All Science Journal Classification (ASJC) codes

  • Metals and Alloys

Cite this

Kimura, Y., & Takaki, S. (1997). Phase transformation mechanism of Fe-Cu alloys. ISIJ International, 37(3), 290-295.

Phase transformation mechanism of Fe-Cu alloys. / Kimura, Yuuji; Takaki, Setsuo.

In: ISIJ International, Vol. 37, No. 3, 1997, p. 290-295.

Research output: Contribution to journalArticle

Kimura, Y & Takaki, S 1997, 'Phase transformation mechanism of Fe-Cu alloys', ISIJ International, vol. 37, no. 3, pp. 290-295.
Kimura Y, Takaki S. Phase transformation mechanism of Fe-Cu alloys. ISIJ International. 1997;37(3):290-295.
Kimura, Yuuji ; Takaki, Setsuo. / Phase transformation mechanism of Fe-Cu alloys. In: ISIJ International. 1997 ; Vol. 37, No. 3. pp. 290-295.
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