Abstract The present paper presents the results of Charpy impact testing for a variety of simulated heat-affected zone (HAZ) samples having different chemical compositions and thermal cycles. The target microstructure was coarse-grained and predominantly composed of upper bainite with martensite-austenite (MA) constituents. Microstructural parameters, including volume fractions of the MA and grain boundary (GB) ferrite and the statistical distributions of the MA particle thickness, lath width and GB ferrite thickness, were measured. All these data were fed into the computational model to predict the Charpy impact absorbed energy transition behavior, presented in Part I. The predicted results agreed well with the experimental results. The present model does not rely on data from multiple specimens, but the Charpy absorbed energy together with its scatter can be predicted from the microstructural parameters and tensile properties only.

中文翻译：

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结合微观力学和随机断裂模型预测钢焊缝热影响区夏比冲击韧性 - 第二部分：模型验证实验

摘要 本文介绍了对具有不同化学成分和热循环的各种模拟热影响区 (HAZ) 样品进行夏比冲击试验的结果。目标显微组织为粗晶组织，主要由具有马氏体-奥氏体 (MA) 成分的上贝氏体组成。测量了微结构参数，包括 MA 和晶界 (GB) 铁素体的体积分数以及 MA 颗粒厚度、板条宽度和 GB 铁素体厚度的统计分布。所有这些数据都被输入到计算模型中，以预测第 I 部分中介绍的夏比冲击吸收能量转换行为。预测结果与实验结果非常吻合。本模型不依赖于来自多个样本的数据，