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首页> 外文期刊>Journal of Materials Engineering and Performance >Static Strain Aging Behavior of a Manganese-Silicon Steel After Single and Multi-stage Straining
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Static Strain Aging Behavior of a Manganese-Silicon Steel After Single and Multi-stage Straining

机译：锰硅钢单级和多级应变后的静态应变时效行为

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摘要

In this work, static strain aging behavior of an alloy steel containing high amounts of silicon and manganese was examined while the influences of initial microstructure and pre-strain on the aging kinetics were evaluated as well. The rate of strain aging in a low carbon steel was also determined and compared with that occurred in the alloy steel. The rates of static strain aging in the steels were defined at room temperature and at 95 A degrees C by means of double-hit tensile testing and hardness measurements. In addition, three-stage aging experiments at 80 A degrees C were carried out to estimate aging behavior under multi-pass deformation processing. The results showed that in-solution manganese and silicon atoms could significantly affect the aging behavior of the steel and reduce the kinetics of static strain aging as compared to the low carbon steel. The initial microstructure also played an important role on the aging behavior. The rapidly cooled steel having mean ferrite grain size of 9.7 mu m showed the least aging susceptibility index during the aging experiments. Accordingly, the activation energies for static strain aging were calculated as 93.2 and 85.7 kJ/mole for the alloy steel having fine and coarse ferrite-pearlite structures, respectively while it was computed as 79.1 kJ/mole for the low carbon steel with ferrite mean grain size of about 16.2 mu m.
机译：在这项工作中，研究了含有大量硅和锰的合金钢的静态应变时效行为，同时还评估了初始组织和预应变对时效动力学的影响。还确定了低碳钢的应变时效速率，并将其与合金钢中的应变时效速率进行比较。通过两次冲击拉伸试验和硬度测量，确定了室温下和在95 A摄氏度下钢中的静态应变时效速率。此外，还进行了80 A摄氏度的三阶段时效实验，以估算多道次变形处理下的时效行为。结果表明，与低碳钢相比，固溶锰和硅原子可显着影响钢的时效行为并降低静态应变时效的动力学。初始的微观结构也对老化行为起重要作用。在时效试验期间，平均铁素体晶粒尺寸为9.7μm的快速冷却钢表现出最小的时效敏感性指数。因此，具有细和粗铁素体-珠光体组织的合金钢的静态应变时效活化能分别为93.2 kJ / mol和85.7 kJ / mol，而具有平均铁素体晶粒度的低碳钢则为79.1 kJ / mol。面积约16.2微米。

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