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首页> 外文期刊>Journal of Materials Engineering and Performance >Analysis of Hot Anisotropic Tensile Flow Stress and Strain Hardening Behavior for Inconel 625 Alloy
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Analysis of Hot Anisotropic Tensile Flow Stress and Strain Hardening Behavior for Inconel 625 Alloy

机译：Inconel 625合金的热各向异性拉伸流量应力和应变硬化行为分析

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In this study, hot deformation behavior of Inconel 625 alloy has been investigated from room temperature to 700 degrees C at an interval of 100 degrees C with slow strain rates (0.0001-0.1 s(-1)). Flow stress behavior is significantly influenced by temperature and strain rate changes. Dynamics strain aging behavior has been reported from 300 to 700 degrees C. Various mechanical properties, namely tensile strength, % elongation, strain rate sensitivity and strain hardening capacity (H-c), have been studied over wide range of temperatures and strain rates. Hc values remarkably improved at higher temperatures which indicate an excellent combination of strength and ductility. Additionally, various anisotropic material parameters, namely Lankford coefficient, normal, planer and in-plane anisotropy and anisotropic index, were evaluated. Furthermore, hardening behavior of Inconel 625 alloy has been analyzed by various flow stress equations like Hollomon, Ludwik, Swift and Voce. Two-stage strain hardening behavior has been noticed at all temperatures. Ludwik and Swift equations represent poor prediction capability at lower strain region. Based on statistical parameter comparison, Voce equation prediction capability is found best in agreement with both strain regions. Finally, the fracture morphology of post-tensile specimens has been studied, indicating ductile-brittle fracture with dimples.
机译：在该研究中，将Inconel 625合金的热变形行为以100摄氏度的间隔从室温到700℃，具有慢的应变率（0.0001-0.1s（-1））。流量应力行为受温度和应变速率变化的显着影响。已经报告了300至700摄氏度的动力学菌株老化行为。在广泛的温度和应变速率范围内，研究了各种机械性能，即抗拉强度，伸缩，菌株率和应变硬化容量（H-C）。 HC值在较高温度下显着改善，表明强度和延展性的优异组合。另外，评估各种各向异性材料参数，即Lankford系数，正常，平面和面内各向异性和各向异性指数。此外，通过霍拉姆，Ludwik，Swift和Voce等各种流量应力方程分析了Inconel 625合金的硬化行为。在所有温度下都发现了两阶段应变硬化行为。 Ludwik和Swift方程代表较低应变区域的预测能力差。基于统计参数比较，voce方程预测能力与应变区一致地达成最佳。最后，研究了后拉伸标本的断裂形态，表明凹槽脆性骨折。

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