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FATIGUE CRACK GROWTH BEHAVIOUR IN WELDED JOINTS OF HIGH-STRENGTH STEEL UNDER LOW TEMPERATURES.

Author(s) : KITSUNAI Y., YOSHIHISA E.

Type of article: Article

Summary

FATIGUE CRACK GROWTH RATES IN THE BASE METAL AND WELDS OF HT80 STEEL WELDED JOINTS WERE EVALUATED FROM ROOM TEMPERATURE DOWN TO 93 K. FOR THE WELDS, THE CRACK GROWTH RATES BETWEEN ROOM TEMPERATURE AND 173 K WERE DOMINATED BY RESIDUAL STRESSES RATHER THAN TEMPERATURES. AS TEMPERATURES DECREASED BELOW 123 K, THE CRACK GROWTH RATES OF THE BASE METAL AND WELDS INCREASED MARKEDLY BECAUSE OF CYCLIC CLEAVAGE DURING STRIATION GR THE CRACK GROWTH RATES OF THE WELDS WERE CORRELATED WITH AN EFFECTIVE STRESS INTENSITY FACTOR RANGE WHICH WAS ESTIMATED BY SUPERPOSITION OF THE RESPECTIVE STRESS INTENSITY FACTORS FOR THE RESIDUAL STRESS FIELDS AND FOR THE APPLIED STRESSES WHEN THE CRACK GROWTH WAS DOMINATED BY STRIATION FORMATION.

Details

  • Original title: FATIGUE CRACK GROWTH BEHAVIOUR IN WELDED JOINTS OF HIGH-STRENGTH STEEL UNDER LOW TEMPERATURES.
  • Record ID : 1992-0937
  • Languages: English
  • Source: JSME int. J., Ser. I - vol. 34 - n. 3
  • Publication date: 1991/07
  • Document available for consultation in the library of the IIR headquarters only.

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