微观结构
材料科学
晶界
微晶
钼
晶界强化
冶金
复合材料
结晶学
化学
作者
Shoichi Kobayashi,Sadahiro Tsurekawa,Tadao Watanabe,A. Kobylanski
标识
DOI:10.1080/14786430801891748
摘要
The formation of grain structures and grain boundary microstructures in polycrystalline molybdenum, produced by thermomechanical processing from cylindrical single crystals with different initial surface normal orientations of ⟨110⟩, ⟨111⟩ and ⟨112⟩, were investigated with the objective of controlling grain boundary microstructures. The polycrystalline specimens displayed different microstructures depending on the initial orientation of the single crystal and the deformed microstructure. The recrystallized microstructure was composed of some oriented-grain clusters, in which grains possessing a similar orientation were assembled. The frequency of low-angle boundaries was very high in the oriented-grain clusters. A close relationship also existed between the grain boundary character distribution (GBCD) and the triple junction distribution. Grain boundary microstructures were compared of bcc molybdenum and fcc polycrystalline materials with reference to path-dependent percolation resistance.
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