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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructural Characterization and High Strain Rate Plastic Flow Behavior of SMAW Armox500T Steel Joints from Spherical Indentation Experiments
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Microstructural Characterization and High Strain Rate Plastic Flow Behavior of SMAW Armox500T Steel Joints from Spherical Indentation Experiments

机译：球形压痕实验中SMAW ARMOX500T钢结构的微结构表征和高应变率塑性流动

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摘要

Static indentation and uniaxial compression tests have been conducted on Armox500T steel and its weldments to predict the constraint factor (CF), i.e., ratio of Meyer's hardness to uniaxial flow stress. Series of dynamic indentation experiments were carried out at impact velocities ranging from 5 to 300 m/s to estimate dynamic hardness as a function of average strain. Subsequently, dynamic indentation (DI) test data and CF determined under static indentation conditions have been used to study the high strain rate plastic flow behavior of Armox500T weldments in comparison with the base metal. It was observed that flow stress for Armox500T and its weldments under dynamic loading conditions (10(4) s(-1)) are significantly higher than flow stress measured under static loading conditions (10(-3) s(-1)). The plastic flow behavior computed from DI is in good agreement with the data evaluated through conventional split Hopkinson pressure bar technique. Further, the study of the microstructure of base metal and weldments by optical microscopy and SEM revealed a considerable variation in the microstructure.
机译：已经在ARMOX500T钢及其焊接上进行了静态压痕和单轴压缩测试，以预测约束因子（CF），即Meyer对单轴流量应力的硬度的比率。系列动态压痕实验在撞击速度下进行，范围为5至300米/秒，以估计动态硬度作为平均菌株的函数。随后，在静态压痕条件下确定的动态压痕（DI）测试数据和CF已经用于研究ARMOX500T焊件的高应变率塑料流动与基础金属相比。观察到，在动态负载条件下，ARMOX500T及其焊接的流量应力显着高于在静态负载条件下测量的流量应力（10（-3）S（-1））。从DI计算的塑料流动行为与通过传统的拆分霍普金森压力条技术评估的数据一致。此外，光学显微镜和SEM通过光学显微镜和焊接的微观结构的研究显示了微观结构的相当大的变化。

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