A Method of Observing Fatigue Crack Growth by SEM

Abstract

Abstract: This paper introduces a modified control cir- cuit of static tensile stage of Cambridge S-200 SEM.The function of the stage is extended to that of a tensile/compressive dynamic fatigue testing stage.It can be used for studying fatigue micro characteristic and crack growth.Direct observa- tions of small crack growth behaviour were carried out under the SEM with modified stage.Results showed the various stages in the development of a crack.

Key words: SEM, dynamic observation, fatigue

MU Ensheng LIN Jizhong WU Yushu HU Yixiang CHENG Zhaoyin **Dept.of Metals and Chemistry,China Academy of Railway Sciences,Beijing 100081,China*** Center Laboratory,Dalian Locomotive Factory of Railway Ministry,Dalian,116021,China+ To whom correspondence s. A Method of Observing Fatigue Crack Growth by SEM[J]. J Mater Sci Technol, 1992, 8(4): 261-265.

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A Method of Observing Fatigue Crack Growth by SEM

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