섬유

evaluating the contribution of corrosion in fatigue failures

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 362
subcritical crack growth by corrosion fatigue occurs by the synergistic interaction of cyclic loading and corrosion. in order to select an appropriate corrective action, it is usually necessary to determine the degree to which corrosion is influencing the fracture process. a practical example is described in which such a determination was made. the example involves molds fabricated from 17-4 ph steel, for producing parts made of polymers. formation of through-wall cracks results in mold failures long before the molds has reached end of life because of wear, loss of surface finish, or loss of dimensional integrity at seals and joints. although the number of thermal cycles at the time of failure was known, the cyclic stress range was not known. the cyclic stress range was estimated by invoking a correlation between the fatigue striation spacing and stress-intensity factors
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