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Features of highly twinned microstructures produced by GBE in FCC materials

机译：GBE在FCC材料中产生高度孪生微观结构的特征

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The proportion of low ΣCSL boundaries of single phase brass, Ni based Alloy 690, 304 stainless steel and Pb alloy were enhanced to about 70% (according to Palumbo-Aust criterion) which mainly were Σ3~n (n = 1, 2, 3…) types by small amount of deformation and recrystallization annealing. All the resulting microstructures were constituted of large size grain-cluster, in which all the orientation relationships between any two grains (no matter adjacent or not) could be described by Σ3~n misorientations according to twin chain analyzing. Twin relationships up to 8th generation (Σ3~8) were found in one of such clusters. The outer boundaries of grain-clusters were crystallographically random with the adjacent clusters. In the case of high proportion of low ΣCSL boundaries, the connectivity of random boundary network was not fragmented obviously when the Palumbo-Aust criterion was used, whereas substantially interrupted when the Brandon criterion was applied.
机译：单相黄油的低ΣCSL边界的比例提高到主要是σ3〜n（n = 1,2,3的脑电图标准）的约70％（根据Palumbo-areust标准） ...）类型少量变形和再结晶退火。所有得到的微结构都由大尺寸粒状构成，其中根据双链分析可以通过σ3〜n错误描述任何两个晶粒（无论相邻）之间的所有取向关系。在其中一个簇中发现了最多第8代（σ3〜8）的双重关系。谷物簇的外边界与相邻的簇晶体地是随机的。在高比例的低ΣCSL边界的情况下，当使用帕卢姆 - 近距离标准时，随机边界网络的连通性显然不会分散，而当施加布兰登标准时基本地中断。

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