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屈服强度为958、752和552兆帕(139、109和80千磅/英寸~2)[分别是 HY-130、A517(F)(统一编号系统(UNS K11576)和 HY-80]的三种合金结构钢,采用常规夏比 V 型缺口(CVN)、疲劳预裂纹夏比和平面应变断裂韧性 K_(IC)试样,试验取得了一些断裂韧性数据。利用这些数据评定了已提出的 K_(IC)数据与夏比型试样数据的相关性,并提出了一些补充相关关系。在考察的五个相关性中,在转变温度范围内,基于标准 CVN 结果的方法(使温度平移量计入冲击,静载数据相关性中)较之其它方法给出了较好的 K_(IC)估算值。但是,在很宽的温度范围取得最好的结果是基于疲劳预裂纹夏比型试样慢弯曲试验结果预示 K_(IC)值的 J 积分相关性方法。
Three yield strengths of 958, 752 and 552 MPa (139, 109 and 80 ksi) [HY-130 and A517 (F) (UNS K11576 and HY-80, respectively) Alloy structural steel, some fracture toughness data were obtained by using conventional Charpy V-notch (CVN), fatigue pre-cracked Charpy and plane strain fracture toughness K_ (IC) specimens.The K_ ( IC) data and Charpy sample data, and put forward some supplementary correlations.In the study of the five correlations, in the transition temperature range, the method based on the standard CVN results (the temperature translation into account Impact, and dead-load data) gave better K IC estimates than other methods, but the best results obtained over a wide temperature range were based on fatigue pre-cracked Charpy samples Bending test results predict J-integral correlation of K_ (IC) values.