The deformation behaviour of hard and soft grains in RR1000 nickel-based superalloy
The deformation behaviour of hard and soft grains in RR1000 nickel-based superalloy
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DOI：
10.1088/1757-899x/82/1/012033
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
S. Birosca
中科院分区：
文献类型：
--
作者：
S. Birosca
在目前的研究中，电子背散射衍射（EBSD）塑性应变测量进行评估，以确定在多晶RR1000镍基高温合金的单个取向晶粒内的变形行为。在这里，晶体取向与几何必要位错（GND）的内容，施密德和泰勒因子以及应变硬化的相关性进行了研究。结果表明，晶界是软晶粒中GND聚集的主要因素，而取向是硬晶粒破碎的关键因素。此外，它的结论是，总GND值为单个晶粒的变化取决于变形阶段，而在晶粒内的高GND密度的位置指示应变硬化状态。关键词：接地，应变硬化，FCC，变形。
In the current study, the Electron Backscatter Diffraction (EBSD) plastic strain measurement is assessed to ascertain the deformation behaviour within individual oriented grains in polycrystalline RR1000 Nickel-based superalloy. Here, the crystallographic orientation correlations with Geometrically Necessary Dislocation (GND) contents, Schmid and Taylor factors as well as strain hardening were investigated. It is demonstrated that grain boundary is the major factor influencing GND accumulation in soft grains, while the orientation is the critical factor in hard grains’ fragmentation. Furthermore, it is concluded that the total GND value for individual grains varies depending on the deformation stage, whereas the locations of high GND density within the grains indicates on strain hardening state. Keywords: GND, Strain Hardening, FCC, Deformation.