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首页> 外文期刊>Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science >Influence of Temperature and Strain Rate on Tensile Deformation and Fracture Behavior of P92 Ferritic Steel
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Influence of Temperature and Strain Rate on Tensile Deformation and Fracture Behavior of P92 Ferritic Steel

机译：温度和应变速率对P92铁素体钢拉伸变形和断裂行为的影响

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Tensile tests were performed at strain rates ranging from 3.16 × 10~(-5) to 1.26 × 10~(-3) s~(-1) over a temperature range of 300 K to 923 K (27 °C to 650 °C) to examine the effects of temperature and strain rate on tensile deformation and fracture behavior of P92 ferritic steel. The variations of flow stress/strength values, work hardening rate, and tensile ductility with respect to temperature exhibited distinct three temperature regimes. The fracture mode remained transgran-ular. The steel exhibited serrated flow, an important manifestation of dynamic strain aging, along with anomalous variations in tensile properties in terms of peaks in flow stress/strength and work hardening rate, negative strain rate sensitivity, and ductility minima at intermediate temperatures. At high temperatures, the rapid decrease in flow stress/strength values and work hardening rate, and increase in ductility with increase in temperature and decrease in strain rate, indicated the dominance of dynamic recovery.
机译：在300 K至923 K（27°C至650°C）的温度范围内以3.16×10〜（-5）至1.26×10〜（-3）s〜（-1）的应变速率进行拉伸测试）以研究温度和应变速率对P92铁素体钢拉伸变形和断裂行为的影响。流动应力/强度值，加工硬化速率和拉伸延性相对于温度的变化表现出不同的三种温度状态。骨折模式仍为晶状。该钢表现出锯齿状流动，动态应变时效的重要表现，以及在中温下的流动应力/强度和加工硬化率峰值，负应变率敏感性和延展性最小值方面的拉伸性能异常变化。在高温下，流动应力/强度值和加工硬化率迅速降低，而随着温度升高和应变率降低，延性增加，这表明动态恢复占主导地位。

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