首页> 外文期刊>Revista de metalurgia >Criterios de predicción de inestabilidades plásticas en procesos de conformado en caliente. (Parte II. Caracterización de la fluencia plástica de un acero microaleado de medio carbono usando criterios continuos y fenomenológicos)
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Criterios de predicción de inestabilidades plásticas en procesos de conformado en caliente. (Parte II. Caracterización de la fluencia plástica de un acero microaleado de medio carbono usando criterios continuos y fenomenológicos)

机译:热成型过程中塑料不稳定性的预测标准。 (第二部分:使用连续和现象学标准表征中碳微合金钢的塑性蠕变)

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In the study of hot forming processes the knowledge of interaction between microstructural behaviour and control process parameters such as temperature, strain rate and strain is very important. In the last decades, processing maps have been developed to design, control and optimize the hot deformation of various metallic materials. In this work, in order to study the hot formability of medium carbon microalloyed steel, during hot compression tests, a comparative study between two types of processing maps constructed using phenomenological and thermodynamic continuum criteria have been carried out. The analysis of the maps indicates that the studied steel does not undergo any type of plastic instability. However, the maps corresponding to the deformation of ε = 0,6 reveal a domain of dynamic recrystallization, considered as the more efficiently domain within the “safe” region process. This domain is centered at 1150 °C and 10 s –1 . Also, the comparative study of the obtained results shows the difference between the positions of plastic deformation domains predicted by the two criteria.
机译:在热成型过程的研究中,了解微观结构行为与控制过程参数(例如温度,应变速率和应变)之间的相互作用非常重要。在过去的几十年中,已经开发了加工图以设计,控制和优化各种金属材料的热变形。在这项工作中,为了研究中碳微合金钢的热成形性,在热压缩试验期间,已经对使用现象学和热力学连续性准则构建的两种类型的加工图进行了比较研究。图的分析表明,所研究的钢没有经历任何类型的塑性不稳定性。但是,与ε= 0,6的变形相对应的映射图显示了动态再结晶域,被认为是“安全”区域过程中更有效的域。该域的中心是1150°C和10 s –1。而且,对所得结果的比较研究表明,由两个标准预测的塑性变形域的位置之间存在差异。

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