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Mechanical properties anisotropy of cold rolled and solution annealed Ni-20Cr-8Fe alloy

机译：Ni-20Cr-8Fe合金冷轧固溶退火的力学性能各向异性。

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摘要

Present work describes a correlation amongst texture, in-plane anisotropy in tensile properties and yield locus in Ni-20Cr-8Fe alloy. The alloy exhibits high and moderate values of in-plane anisotropy and anisotropy index, respectively. This has been attributed to the presence of moderate overall intensity of texture as well as partially recrystallized microstructure. The tensile properties evaluated in five sample directions, namely the 0° (longitudinal or L), 22.5°, 45°, 67.5° and 90° (transverse or T) to the rolling direction, display two slopes in true plastic stress-strain curve and follow a Ludwigson relation. At low strains, sample displays the presence of annealing twins and less strain localization (1.5-3.5° boundaries) while the formation of deformation twins and high strain localization are observed in high strained region. The 67.5° orientation sample shows relatively low ductility and low work hardening exponent. This has been explained using Kock-Mecking-Estrin analysis based on higher degree of dynamic recovery/glide softening and fluctuations in work hardening rate during stage Ⅱ.
机译：目前的工作描述了Ni-20Cr-8Fe合金的织构，平面各向异性和拉伸性能以及屈服点之间的关系。该合金分别具有高和中等值的面内各向异性和各向异性指数。这归因于存在适度的总体质地强度以及部分重结晶的微观结构。在五个样品方向上评估的拉伸性能，即相对于轧制方向的0°（纵向或L），22.5°，45°，67.5°和90°（横向或T），在真实塑性应力-应变曲线中显示了两个斜率并遵循路德维希森的关系。在低应变下，样品显示出退火孪晶的存在和较小的应变局部化（1.5-3.5°边界），而在高应变区域观察到形变孪晶的形成和高应变局部化。 67.5°取向样品显示出较低的延展性和较低的加工硬化指数。基于Ⅱ阶段较高的动态恢复/胶体软化程度和工作硬化率的波动，已使用Kock-Mecking-Estrin分析对此进行了解释。

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