Failure of Scales Formed on Cu-containing Low Carbon Steels during Cooling

この論文にアクセスする

この論文をさがす

著者

    • TANIGUCHI Shigeji
    • Department of Materials Science and Processing, Faculty of Engineering, Osaka University
    • SHIBATA Toshio
    • Department of Materials Science and Processing, Faculty of Engineering, Osaka University

抄録

Low carbon steels containing 0 to 1.5 mass% Cu were oxidised in air at 1 073, 1 150, 1 273 and 1 386 K for up to 3.6 ks. An acoustic emission (AE) technique was used to assess the temperature at which mechanical failure of the scale takes place during cooling in static air. The conventional metallographic examinations revealed that the scales consist mainly of two FeO layers; the inner layer is porous FeO and the outer layer is dense FeO for oxidation temperatures of up to 1 273 K. Cu and Si are enriched in the porous FeO layer at the interface of the two FeO layers. At 1 386 K an FeO layer containing Fe<sub>2</sub>SiO<sub>4</sub> (fayalite) grains is formed instead of the inner porous FeO layer. Cu is enriched at the scale/substrate interface, while Si is enriched as Fe<sub>2</sub>SiO<sub>4</sub> grains in the inner FeO layer near the both interfaces. The enrichment of Cu is unrecognisable for the Cu content less than 0.5 %. The modes of scale failure observed are (a) partial separation at the two FeO layers, (b) partial separation at the scale/substrate interface, (c) through-scale crack almost normal to the substrate surface, (d) shear crack in the inner FeO layer at about 45 degrees to the substrate surface and (e) blistering of a thin Fe<sub>2</sub>O<sub>3</sub> layer over a small area. The frequency is in this order; <i>i.e.</i> (a) is most frequently observed and (e) is very rare. The values of Δ<i>T</i> (oxidation temperature-failure temperature) detected by the AE measurement were converted into the apparent thermal stresses to cause the scale failure. The stress increases in a range 0.5 to 1 GPa as the oxidation temperature rises up to 1 273 K. A further temperature rise slightly decreased the stress. This is attributable to the formation of Fe<sub>2</sub>SiO<sub>4</sub> grains in the FeO layer. The increase in the Cu content slightly increases the stress.

収録刊行物

  • ISIJ international

    ISIJ international 37(3), 263-271, 1997-03-15

    The Iron and Steel Institute of Japan

参考文献:  25件中 1-25件 を表示

  • <no title>

    OHTAKE T.

    J. Jpn. Inst. Met. 21, 640, 1957

    被引用文献2件

  • <no title>

    MELFORD D. A.

    J. Iron Steel Inst. 200, 290, 1962

    被引用文献6件

  • <no title>

    NICHOLSON A.

    J. Iron Steel Inst. 203, 1007, 1965

    被引用文献15件

  • <no title>

    WOLF M. M.

    Trans. Iron Steel Inst. Jpn. 24, 351, 1984

    被引用文献1件

  • <no title>

    KAJITANI T.

    Tetsu-to-Hagane 81, 185, 1995

    被引用文献16件

  • <no title>

    FUKUTSUKA T.

    Tetsu-to-Hagane 66, 1512, 1980

    被引用文献2件

  • <no title>

    FUKUTSUKA T.

    Bull. Jpn. Inst. Met. 19, 231, 1980

    被引用文献1件

  • <no title>

    NAKAMURA T.

    Tetsu-to-Hagane 80, 237, 1994

    被引用文献2件

  • <no title>

    FUKAGAWA T.

    Tetsu-to-Hagane 82, 63, 1996

    被引用文献9件

  • <no title>

    ADACHI T.

    Oxid. Met. 27, 347, 1987

    被引用文献1件

  • <no title>

    BENNETT M. J.

    Mater. Sci. Eng. A120, 199, 1989

    被引用文献1件

  • <no title>

    ZHANG Y.

    J. Electrochem. Soc. 141, 1255, 1994

    被引用文献2件

  • <no title>

    CHRISTL W.

    Oxid. Met. 31, 35, 1989

    被引用文献1件

  • <no title>

    KHANNA A. S.

    Werkst. Korros. 40, 552, 1989

    被引用文献2件

  • <no title>

    BARNES J. J.

    Oxid. Met. 32, 449, 1989

    被引用文献1件

  • <no title>

    EVANS U. R.

    Trans. Electrochem. Soc. 91, 547, 1947

    被引用文献1件

  • <no title>

    EVANS H. E.

    Mater. Sci. Eng. A120, 139, 1989

    被引用文献2件

  • <no title>

    MACKENZIE J. D.

    Corrosion 13, 783, 1957

    被引用文献1件

  • <no title>

    TYLECOTE R. F.

    J. Iron Steel Inst. 196, 135, 1960

    被引用文献1件

  • <no title>

    HANCOCK P.

    Mater. Sci. Technol. 4, 398, 1988

    被引用文献2件

  • <no title>

    STRINGER J.

    Corros. Sci. 10, 513, 1970

    被引用文献3件

  • <no title>

    TANIGUCHI S.

    Trans. Iron Steel Inst. Jpn. 25, 3, 1985

    被引用文献1件

  • <no title>

    KATAOKA K.

    Trans. Iron Steel Inst. Jpn. 24, 365, 1984

    被引用文献1件

  • <no title>

    HORNBOGEN E.

    Trans. TMS of AIME 218, 1064, 1960

    被引用文献1件

  • <no title>

    DEADMORE D. L.

    Oxid. Met. 11, 91, 1977

    DOI 被引用文献1件

被引用文献:  1件中 1-1件 を表示

各種コード

ページトップへ