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Cavitation-Erosion Characteristics between Polymer Based Composites and Metals under the Various Condition of Fluid Systems

유체 환경하에서의 고분자 기지 복합재료와 금속재의 캐비테이션 침식 특성

  • 김윤해 (한국해양대학교 기계소재공학부) ;
  • 손영준 (한국해양대학교 대학원 재료공학과) ;
  • 엄수현 (한국해양대학교 대학원 재료공학과) ;
  • 이정주 (상신브레이크)
  • Published : 2003.03.01

Abstract

This study is mainly concerned with phenomenon of cavitation-erosion on the several materials and corrosive liquids which were applied with vibrator(suggested by ASTM G 32, 20KHz, 50$mu extrm{m}$). The maximum erosion rate by cavitation erosion in both of distilled water and sea water appeared to be proportioned to their hardness and tensile strength. Cavitation weight loss and rate of cast iron in sea water condition were greater(approximately 3 times) than that in distilled water condition, however in case of stainless steel and brass the cavitation weight loss of composite materials were not so different in both of their conditions. Cavitation weight loss of composite materials were shown as below on this test, Duratough DL : Weight loss in sea-water condition were greater (approximately 2.3 times) than it's distilled water condition. The main tendency of cavitation erosion for metals appeared that small damaged holes causing by cavitation erosion was observed with radial pattern. On the other hand, the tendency for composites appeared that small damaged holes were observed randomly.

Keywords

Cavitation-Erosion;MDPR;Supersonic Vibrator;Fluid System;Composite Materials;Cavitation;Volume Loss

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