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首页> 外文期刊>Materials at High Temperatures >Influence of processing route and section size on tensile stress-strain and work hardening behaviour of 9Cr-1Mo ferritic steel
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Influence of processing route and section size on tensile stress-strain and work hardening behaviour of 9Cr-1Mo ferritic steel

机译：加工路线和截面尺寸对9Cr-1Mo铁素体钢拉伸应力应变和加工硬化行为的影响

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摘要

True stress-true plastic strain behaviour of 9Cr-lMo steel in two different product forms, i.e. 20-mm plate and thick section tubeplate forging has been examined in the temperature range 300-873 K in the framework of various flow relationships. The analysis suggested that a combination of Ludwigson and Hollomon equations describes stress-strain behaviour most accurately in both plate and tubeplate forging. Two-stage work hardening has been observed in the variations of instantaneous work hardening rate with stress. The variations in stress-strain, flow parameters and work hardening rate as a function of stress with respect to temperature exhibited three distinct temperature regimes. Signatures of dynamic strain ageing at intermediate temperatures and dominance of dynamic recovery at high temperatures have been observed. The differences in tensile flow and work hardening behaviour obtained between plate and tubeplate forging has been attributed to the affects associated with the initial microstructures obtained for the two product forms in 9Cr-1Mo steel.
机译：已经在300-873 K的温度范围内，以各种流动关系为框架，研究了9Cr-1Mo钢在两种不同产品形式下的真实应力-真实塑性应变行为，即20mm板和厚截面管板锻件。分析表明，路德维希森方程和Hollomon方程的组合最准确地描述了板锻和管板锻造中的应力应变行为。在瞬时工作硬化率随应力的变化中，观察到了两阶段的工作硬化。应力-应变，流动参数和加工硬化速率随应力相对于温度的变化表现出三种不同的温度状态。已经观察到在中间温度下动态应变时效的特征以及在高温下动态恢复的优势。板和管板锻件之间获得的拉伸流动性和加工硬化行为的差异归因于与9Cr-1Mo钢中两种产品形式获得的初始微观结构相关的影响。

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