초음파-파면해석에 의한 대차 프레임의 건전성 평가

Integrity evaluations of bogie frame using ultrasonic-fractography analysis

  • 윤인식 (대한검사기술(주) 기술부) ;
  • 권성태 (한국철도연구원 시험인증) ;
  • 정우현 (인천제철(주) 포항공장 품질보증) ;
  • 박덕신 (한국철도기술연구원 시설전기연구본) ;
  • 김경국 (대한검사기술(주) 기술부)
  • 발행 : 2000.11.01

초록

This study proposes the integrity evaluation of bogie frame using ultrasonic waves-fractography analysis. Analysis objectives in this study are to investigate fracture planes of damaged zone by the A-scan method. The surface condition of fracture plane shows degree of degradation by stress concentration. The detection of the natural defects in bogie frame is performed using the characteristics of echodynamic pattern in ultrasonic signal. Results of ultrasonic testing agree fairly well with those of actual fracture plane. In quantitative fractography analysis, microstructures of actual fracture plane turned out to be intergranular and transgranular fracture, Proposed ultrasonic-fractography analysis in this study can be used for the integrity evaluation of the bogie frame

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