Microstructure and mechanical property of copper bearing eutectoid steel

Masahiro Murakami, Youhei Takanaga, Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)


    Isothermal heat treatment was performed for austenitized Cu bearing eutectoid steels (Fe-0.8%C-Cu alloys). Microstructural observations revealed that the pearlite transformation is significantly retarded by the addition of Cu, but the morphology of pearlite, such as lamellar spacing and block size, are hardly influenced by the Cu addition. From the result of chemical analysis for cementite phase, it was found that the redistribution of Cu had occurred between ferrite and cementite through the interfacial diffusion during pearlite transformation and then the precipitation of Cu takes place simultaneously within ferrite phase. Furthermore, in the 2 % Cu steel, age hardening behavior was found at the same temperature applied to the isothermal pearlite transformation. This means that the precipitation of Cu does not complete on pearlite transformation and the ferrite in pearlite structure is in the supersaturated state. Yield strength and tensile strength of the pearlite steels depend on not only lamellar spacing but also the dispersion of Cu particles within the ferrite phase. For example, 2 % Cu addition increases yield strength and tensile strength by about 250 MPa without reducing ductility so much.

    Original languageEnglish
    Pages (from-to)1467-1472
    Number of pages6
    Journalisij international
    Issue number10
    Publication statusPublished - 2008

    All Science Journal Classification (ASJC) codes

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry


    Dive into the research topics of 'Microstructure and mechanical property of copper bearing eutectoid steel'. Together they form a unique fingerprint.

    Cite this