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CTOD fracture toughness assessment method of High-strength steel based on BS7910

机译:基于BS7910的高强度钢CTOD断裂韧性评估方法

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As one of the essential criteria of assessment to welding toughness,CTOD(Crack tip opening displacement) is widely applied in engineering.The research on allowable values of the CTOD of high strength and thickness steel has been a hot issue,therefore the theoretical research in China lags behind its overseas.The present paper takes the single edge fatigue precrack of CTOD specimen as a flaw with the technical route of the British Standard 7910-2005,that is 'Guide to methods for assessing the acceptability of flaws in metallic structures'.In the meanwhile,make the grading assessments of the welding seam center of the EQ70/56 joints,combining the results of the CTOD tests.The assessments on welded joints of EQ70/56 show that the CTOD values are in the acceptable range.This method provides some useful guidance in researches of allowable CTOD values.
机译:作为评价焊接韧性的必要标准之一,CTOD(裂纹尖端开口位移)在工程中得到了广泛的应用。高强度高厚度钢CTOD允许值的研究一直是一个热点问题,因此在理论上进行了研究。中国落后于海外。本文将CTOD试样的单边疲劳预裂纹作为缺陷,采用英国标准7910-2005的技术路线,即“评估金属结构缺陷可接受性的方法指南”。同时结合CTOD测试结果对EQ70 / 56接头的焊缝中心进行等级评定。对EQ70 / 56接头的焊缝评估表明,CTOD值在可接受的范围内。为研究CTOD允许值提供了一些有用的指导。

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