Distribution of Internal Crack Initiation Sites in High-cycle Fatigue for Titanium Alloys

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In order to clarify how the internal crack initiation site distributes according to microstructure in high-cycle fatigue, α-β or near α titanium alloys with various microstructure were subjected to fatigue test in liquid nitrogen. The internal crack initiation occurred longer than 10^5 cycles at 77 K. The initiation site was a facet or its aggregate which originated from α grain transgranular cracking in each material. In equiaxed α structures, the location of initiation site was obviously restricted to near the specimen surface (i.e. 10-200μm deep from the specimen surface). In acicular α structures, the location was more or less near the specimen surface and more interior cases were also seen, which were associated with a larger initiation site size. In elongated α structure, on the contrary, the location was scattered from the vicinity of specimen surface to the center in fracture surface. The size of the internal crack initiation sites was evaluated, and the location of the sites was discussed from the viewpoints of the cyclic stress and their size.

In order to clarify how the internal crack initiation site distributes according to microstructure in high-cycle fatigue, α-β or near α titanium alloys with various microstructure were subjected to fatigue test in liquid nitrogen. The internal crack initiation occurred longer than 10<sup>5</sup> cycles at 77 K. The initiation site was a facet or its aggregate which originated from α grain transgranular cracking in each material. In equiaxed α structures, the location of initiation site was obviously restricted to near the specimen surface (<i>i.e.</i> 10-200 μm deep from the specimen surface). In acicular α structures, the location was more or less near the specimen surface and more interior cases were also seen, which were associated with a larger initiation site size. In elongated α structure, on the contrary, the location was scattered from the vicinity of specimen surface to the center in fracture surface. The size of the internal crack initiation sites was evaluated, and the location of the sites was discussed from the viewpoints of the cyclic stress and their size.

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  • ISIJ international

    ISIJ international 37(12), 1237-1244, 1997-12-15

    日本鉄鋼協会

参考文献:  22件中 1-22件 を表示

  • <no title>

    ATRENS A.

    Scr. Metall. 17, 6701, 1983

    被引用文献1件

  • <no title>

    NEAL D. F.

    Acta Metall. 24, 59, 1976

    被引用文献3件

  • Fatigue Mechanisms

    RUPPEN J.

    ASTM STP 675, 47, 1979

    被引用文献1件

  • <no title>

    ADACHI S.

    Titanium Science and Technology 4, 2139, 1985

    被引用文献4件

  • <no title>

    EYLON D.

    J. Mater. Sci. 14, 345, 1979

    被引用文献2件

  • <no title>

    EYLON D.

    J. Mater. Sci. 14, 1914, 1979

    被引用文献2件

  • <no title>

    HAGIWARA M.

    Tetsu-to-Hagane 76, 2182, 1990

    被引用文献2件

  • <no title>

    HAGIWARA M.

    Tetsu-to-Hagane 77, 139, 1991

    被引用文献2件

  • <no title>

    CHAIT R.

    Metall. Trans. 8A, 1017, 1977

    被引用文献2件

  • <no title>

    NAGAI K.

    Trans. Iron Steel Inst. Jpn. 27, 376, 1987

    被引用文献1件

  • <no title>

    UMEZAWA O.

    Sci. Eng. A129, 217, 1990

    被引用文献1件

  • <no title>

    NAGAI K.

    Titanium '95 2, 1139, 1996

    被引用文献2件

  • <no title>

    NAGAI K.

    ISIJ Int. 31, 882, 1991

    被引用文献2件

  • <no title>

    UMEZAWA O.

    Fatigue 90 1, 267, 1990

    被引用文献2件

  • <no title>

    FOR

    Acta Metall. 17, 1219, 1969

    被引用文献1件

  • <no title>

    FOURIE J. T.

    Philos. Mag. 17, 735, 1968

    被引用文献2件

  • <no title>

    KRAMER I. R.

    Mater. Sci. Eng. 80, 37, 1986

    被引用文献2件

  • <no title>

    McCLINTON M.

    ONR TR-3 contract N 000 14-80-C-116, 1981

    被引用文献2件

  • <no title>

    UMEZAWA O.

    Mater. Sci. Eng. A176, 397, 1994

    被引用文献3件

  • <no title>

    PETERS M.

    Titanium '80 Science and Technology 3, 1777, 1980

    被引用文献1件

  • <no title>

    UMEZAWA O.

    ISIJ Int. 37, 1170, 1997

    被引用文献3件

  • <no title>

    RUPPEN J. A.

    Metall. Trans. 11A, 1072, 1980

    DOI 被引用文献2件

被引用文献:  2件中 1-2件 を表示

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