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首页> 外文期刊>Journal of Materials Engineering and Performance >EBSD Study on Processing Domain Parameters of Oxide DispersionStrengthened 18Cr Ferritic Steel
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EBSD Study on Processing Domain Parameters of Oxide DispersionStrengthened 18Cr Ferritic Steel

机译：EBSD研究氧化物分散的域参数的18CR铁素体钢

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摘要

This paper presents the results of an experimental study aimed to identify hot working domains in oxide dispersion strengthened (ODS) 18Cr ferritic steel over a wide range of temperatures (1323-1473K) and strain rates (0.01-10s(-1)). The experimental data were obtained by uniaxial compression test using the Gleeble-1500D simulator in this range of temperature and strain rate. An inverse relationship with temperature and positive strain rate sensitivity associated with dynamic recovery and recrystallization, which is influenced by temperature and strain rate, was derived from the flow stress. Based on the processing map generated at 0.5 true strain, using rate dynamic material model (DMM) approach and the calculated instability parameter 0, the optimum processing domain has been determined for this steel. The most favorable processing parameters are found in the temperature ranges of 1350-1450K with a strain rate of 0.01s(-1) and 1473K with a strain rate 0.1s(-1) with peak efficiency of 30 and 35%, respectively. The material flow behavior was studied using scanning electron microscopy (SEM)-based EBSD microstructural characterization. The steel subjected to 1323K at high strain rate 10s(-1) in the low-efficiency workability region showed low aspect ratio as compared to the elongated bamboo-like initial microstructure; however, minimum strain rate (0.01s(-1)) showing that localized slip/shearing is the key mechanism and fiber texture studied from the intensity distribution of inverse pole figure showed the presence of significant amount of -fibers. In contrast, dynamic recrystallization dominated at higher efficiency region in the safe domain of processing map and -fiber texture was evident in the specimen deformed at 1373 and 1473K with strain rate of 0.01 and 0.1s(-1), respectively, which is responsible for the change in the initial 1 1 0 //ED -fiber texture.
机译：本文介绍了实验研究的结果，其旨在在宽范围（1323-1473K）和菌株率（0.01-10s（-1））上强化（ODS）18Cr铁素体钢的加强（ODS）18Cr铁素体钢的实验研究。通过在该温度和应变率范围内使用GLEEBLE-1500D模拟器通过单轴压缩试验获得实验数据。与动态回收和重结晶相关的温度和阳性应变速率灵敏度的反比关系来自流量应力。基于在0.5真实应变的处理地图，使用速率动态材料模型（DMM）方法和计算的不稳定性参数0，已经确定了该钢的最佳处理结构域。最有利的加工参数在1350-1450K的温度范围内，应变率为0.01℃和1473K，应变率为0.1s（-1），峰值效率分别为30和35％。使用扫描电子显微镜（SEM）基于EBSD微观结构表征研究了材料流动行为。与细长竹状初始微观结构相比，在低效率的可加工区域的高应变率10s（-1）处经受1323K的钢，显示出低纵横比;然而，显示局部滑移/剪切的最小应变率（0.01℃））是从逆极值的强度分布研究的关键机制和纤维纹理显示出大量的 - 纤维量的存在。相反，在处理图的安全领域的较高效率区域中支配的动态再结晶在标本中明显明显，在1373和1473K中，应变率分别为0.01和0.1s（-1），这是负责任的初始＆的变化1 1 0＆ // ed -fiber纹理。

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