ラメラテア感受性評価方法について : ラメラテアの研究 (2)

概要

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The present paper discusses possible means of assessing lamellar tearing susceptibility of steel plate, taking into consideration factors for initiating lamellar tearing, referred to the preceding paper. Also discussed is the standard for steel graduation with respect to lamellar tearing tendency, giving a typical example of it. Various testing means for assessing the lamellar tearing tendency have been suggested up to now. The present authors, however, are of opinion that a synthetic consideration will be required from a viewpoint of their correspondence to the performance in real structures, reproducibility, easiness in testing procedures and so forth, before some of these are qualified to be the appropriate assessing means. The present work points out the ploblems involved in the above-mentioned testing means, presents tentative standard testing procedures, and studys the correlation between these and the Z-type window test (the window test in which restraint stresses act in thickness direction). Its outline is as follows : (1) It is shown that both the reduction of area, in tensile test in the through-thickness direction, and the content of sulphur are the best engineering measures of lamellar tearing tendency. The specific characteristics of each testing means are also discribed. (2) An example is given of steel graduation according to the above-mentioned engineering measures.
社団法人溶接学会の論文
1976-03-05