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Texture Development During Rolling of ? + ? Dual-Phase ZrNb Alloys

Christopher S. DanielPeter D. HonniballLuke BradleyMichael PreussJoão Quinta da Fonseca

出版	ASTM International, 2018
URL	http://books.google.com.hk/books?id=DY94zgEACAAJ&hl=&source=gbs_api

註釋The texture evolution during high-temperature rolling (800°C) of two model zirconium-niobium alloys was studied using electron backscatter diffraction. The aim was to decouple the relative importance of deformation and phase transformation on the final texture in an effort to elucidate the origin of the strong ?-transverse basal texture commonly found in the hot-rolled product. The analysis uses a reconstruction software based on the Burgers relation to reconstruct the high-temperature ? orientations, with the indexed ? as input. In the low niobium content alloy, the texture evolution of the 1120 1010 component was consistent with deformation in both ? and ? phases, along with a variant selection mechanism that occurred during the ? -> ? phase transformation. Variant selection was observed to depend on the orientation of the deformed prior ? grains. In the high niobium content alloy, a lower ? volume fraction during hot rolling gave rise to different ? textures and promoted the formation of a Goss component. This contributed to the 1120 1010 component upon cooling, with variant selection enhanced by anisotropic grain breakup.