材料期刊网

A Method of Observing Fatigue Crack Growth by SEM

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

材料科学技术（英文）

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.

关键词: SEM , null , null