首页> 外文会议>International Conference on Microalloying for New Steel Processes and Applications; 20050907-09; Basque Country(ES) >Modelling Strain Induced Precipitation of Niobium Carbonitride during Multipass Deformation of Austenite
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Modelling Strain Induced Precipitation of Niobium Carbonitride during Multipass Deformation of Austenite

机译:奥氏体多道次变形过程中应变诱发碳氮化铌沉淀的建模

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摘要

A new model of strain induced precipitation in niobium microalloyed austenite is proposed. This is based on the experimental observation of formation of microbands during hot deformation of iron - 30% nickel, which remains austenitic to room temperature. Precipitates are preferentially nucleated on nodes in the dislocation network in the microbands. This geometry enables features of earlier models to be simply explained, and facilitates extension of the model to multipass deformation. It is shown that the model captures all the essential features of previous experimental observations on microalloyed C - Mn steels. Currently, sensitivity analysis of the model and systematic experimental work are being undertaken to quantitatively validate the model.
机译:提出了一种应变诱导铌微合金奥氏体中析出的新模型。这是基于对铁(30%镍)热变形过程中微带形成的实验观察,该铁保持奥氏体至室温。沉淀物优先在微带中位错网络中的节点上成核。这种几何形状可以简单地解释较早模型的特征,并有助于将模型扩展到多遍变形。结果表明,该模型捕获了先前对微合金C-Mn钢进行的实验观察的所有基本特征。当前,正在进行模型的敏感性分析和系统的实验工作以定量验证模型。

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