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Microstructure based flow stress model to predict machinability in ferrite-pearlite steels

机译:基于微观结构的流量应力模型,以预测铁氧体 - 珠光体钢材的可加工性

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摘要

A new flow stress model is proposed to describe the behaviour of ferrite-pearlite steels based on microstructure properties, including the effect of high strains, strain rates and temperatures. The model introduces strain hardening as a function of the pearlite ratio, interlamellar spacing and ferrite grain size. A non-linear thermal softening, and the coupling between strain rate and temperature are also introduced. Tested on a 2D ALE model, predicted cutting forces, tool temperatures, chip thickness and tool wear results obtained good agreement when compared to orthogonal cutting tests of four ferrite-pearlite steels, covering a wide range of microstructure variants. (C) 2019 Published by Elsevier Ltd on behalf of CIRP.
机译:提出了一种新的流量应力模型来描述基于微观结构性质的铁素体 - 珠光体钢的行为,包括高菌株,应变率和温度的影响。 该模型以珠光体比例引入应变硬化,层间间距和铁氧体晶粒尺寸。 还引入了非线性热软化,以及应变速率和温度之间的耦合。 在2D ALE模型上测试,预测的切割力,刀具温度,芯片厚度和工具磨损的结果与四个铁氧体 - 珠光体钢的正交切削测试相比,获得了良好的一致性,涵盖了各种微观结构变体。 (c)2019年由elsevier有限公司发布代表CIRP。

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