Presence and absence of significant twinning: Effects on cold deformed microstructures of single phase Zircaloy 2
Presence and absence of significant twinning: Effects on cold deformed microstructures of single phase Zircaloy 2
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DOI：
10.1016/j.msea.2009.05.025
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发表时间：
2009-08
期刊：
影响因子：
6.4
通讯作者：
S. Sahoo;V. Hiwarkar;A. Majumdar;I. Samajdar;P. Pant;G. K. Dey;D. Srivastav;R. Tiwari;S. Banerjee
中科院分区：
文献类型：
--
作者：
S. Sahoo;V. Hiwarkar;A. Majumdar;I. Samajdar;P. Pant;G. K. Dey;D. Srivastav;R. Tiwari;S. Banerjee
完全再结晶的锆合金2样品是在两个主要类别的晶体取向：晶粒主要（I）的基础（10001）和（II）非基面正常。本研究绘制了详细的微观结构的发展，这两个样品，在单轴冷压缩。样品I显示出不显著的孪生，并具有更强的签名（晶粒内取向不良和晶格应变和位错密度的估计值）的滑移;而样品II既有滑移和孪生，又有晶体织构的实质性修改。在疑似母体和产品晶粒/孪晶方向之间观察到残余应力的强烈异质性。这种效果可以捕获，有效地，与一个简单的几何模型的基础上各向异性的弹性刚度。
Fully recrystallized Zircaloy 2 samples were made in two dominant classes of crystallographic orientations: grains with predominantly (I) basal (〈0001〉) and (II) non-basal plane-normal. The present study charted out detailed microstructural developments, of both the samples, during uniaxial cold compression. Sample I showed insignificant twinning and had stronger signatures (in-grain misorientation and estimated values of lattice strain and dislocation densities) for slip; while sample II had both slip and twin and substantial modifications in crystallographic texture. Strong heterogeneity in residual stress was observed between the suspected parent and product grains/orientations of twinning. This effect could be captured, effectively, with a simple geometric model based on anisotropic elastic stiffness.