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首页> 外文会议>Symposium on Small Specimen Test Techniques: Fourth Volume; Jan 23-25, 2000; Reno, Nevada >A Study of Specimen Size Effects on the Initiation Toughness and Tearing Resistance of an A533B-1 Steel
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A Study of Specimen Size Effects on the Initiation Toughness and Tearing Resistance of an A533B-1 Steel

机译：试件尺寸对A533B-1钢的起始韧性和抗撕裂性的影响

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摘要

This paper provides comparison of initiation toughness values and J_R curve data for a series of geometrically scaled compact (CT) and single edge notched bend (SENB) geometry specimens taken from a well characterized A533B-1 pressure vessel steel. The CT specimens (W = 2B) were of thickness B = 100, 40, 20, 15, 12.5 & 10 mm, and SENB specimens (W = 2B and W = B) of B = 20, 10 & 5 mm. The data reported are multi-specimen J-Δa values obtained from a total in excess of 400 tests made at ambient temperature (20℃) and 288℃ on both plain-sided and sidegrooved specimens. The findings of the work indicate that for the material under study there is little effect of specimen size or geometry on the initiation toughness for a given level of sidegrooving. It also indicates that small size specimens (i.e., W = 10, B = 5mm) can provide J_R curve data equivalent to those obtained for the larger specimens for levels of J up to 600kJm~(-2) and crack extension Δa up to approximately 25% of their initial remaining ligament (40% for 20% side grooved specimens). Suggestions are made to relax the current specimen size validity limits. The results presented here encourage the use of SENB specimens possibly as small as 5 x 5 mm for the determination of initiation toughness in these materials
机译：本文提供了一系列取自特征明确的A533B-1压力容器钢的一系列几何比例压缩（CT）和单边缺口弯曲（SENB）几何样本的初始韧性值和J_R曲线数据的比较。 CT样本（W = 2B）的厚度为B = 100、40、20、15、12.5和10毫米，SENB样本（W = 2B和W = B）的厚度为B，20、10和5毫米。报告的数据是在环境温度（20℃）和288℃下在平侧和侧槽样品上进行的总共400多次测试中获得的多样品J-Δa值。这项工作的发现表明，对于给定水平的开槽，对于所研究的材料，试样尺寸或几何形状对初始韧性几乎没有影响。这也表明，小尺寸的试样（即W = 10，B = 5mm）可以提供J_R曲线数据，该数据等效于较大的试样在J达到600kJm〜（-2）且裂纹扩展Δa达到大约25％的初始剩余韧带（对于20％的侧槽试样，为40％）。提出了放宽当前样本大小有效性限制的建议。此处介绍的结果鼓励使用SENB样品（可能小至5 x 5 mm）来确定这些材料的初始韧性

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