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Towards a Through-Process Model for Welding of 9Cr Steel

机译：朝着9CR钢焊接焊接的贯通过程模型

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A through-process modelling methodology has been developed to predict the effect of the gas tungsten arc welding (GTAW) process on tensile stress-strain response within the as-welded inter-critical heat-affected zone (ICHAZ) of a 9Cr steel. A physically-based, unified viscoplasticity model, with dislocation density evolution and plasticity damage, was implemented and validated across a range of temperatures for tempered and untempered P92 martensitic steel phases. A dual-phase model was developed, using a rule of mixtures approach, to predict the variation in temperature-dependent tensile behaviour within the ICHAZ of a GTAW butt-welded thick-walled P92 pipe, based on the predicted phase distributions. The model was calibrated against experimental test data for both tempered and untempered martensite across a range of temperatures.
机译：已经开发了一种通过过程建模方法，以预测气体钨弧焊（GTAW）处理对9CR钢的抗临界际热影响区域（ICHAZ）内的拉伸应力 - 应变响应的影响。通过脱位密度进化和可塑性损坏的物理统一粘质模型进行并验证，并验证了一系列温度和无可受高的P92马氏体钢相的温度。使用混合物方法的规则开发了双相模型，以预测基于预测的相分布的GTAW对接焊接厚壁P92管内的ICHAZ内的温度依赖性拉伸行为的变化。在一系列温度范围内针对钢化和无限马氏体的实验测试数据校准该模型。

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