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首页> 外文会议>International Symposium on Eco-Materials Processing amp; Design; 20060108-11; Chengdu(CN) >Prediction of Flow Curves and Micro-structural Evolution in Strain Induced Dynamic Transformation of Low Carbon Steel
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Prediction of Flow Curves and Micro-structural Evolution in Strain Induced Dynamic Transformation of Low Carbon Steel

机译：低碳钢应变诱发动态转变中的流动曲线预测和微观组织演变

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摘要

The relationships between flow stress curve and microstructure evolution in strain induced dynamic phase transformation (SIDT) of low carbon steel (0.22wt.%) were quantitatively investigated. The deformation was carried out at just above Ar_3 temperature (710℃) as a function of strain rate (0.01-5/sec). The softening process of SIDT was well agreed with calculated result derived from Avrami's and constitutive equation at higher strain rate than 0.5/sec. However, the calculated results differed from the experimental curve at strain rate of less than 0.2/sec. This is due to fact that the dynamic transformation from austenite to ferrite can not be completed owing to less stored energy during hot deformation.
机译：定量研究了低碳钢（0.22wt。％）的应变诱导动态相变（SIDT）中的流变应力曲线与组织演变之间的关系。形变是在刚好高于Ar_3温度（710℃）下进行的，它是应变速率（0.01-5 / sec）的函数。在高于0.5 / sec的应变速率下，SIDT的软化过程与从Avrami和本构方程得出的计算结果完全吻合。但是，在小于0.2 / sec的应变速率下，计算结果与实验曲线不同。这是由于这样的事实，由于在热变形过程中储存的能量较少，所以无法完成从奥氏体到铁素体的动态转变。

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