کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
794750 902549 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electron microscopy characterization of the weld line zones of an inertia friction welded superalloy
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Electron microscopy characterization of the weld line zones of an inertia friction welded superalloy
چکیده انگلیسی

Microstructure in the weld line (WL) zone produced by inertial friction welding has been studied for a series of RR1000–RR1000 welds using transmission electron and scanning electron microscopy. A fully recrystallised fine grain structure was found to form throughout the WL zone, characterized by straight and smooth grain boundaries, high energy status and modified grain boundary chemistry due to very fast cooling after welding. Very fine γ′ particles with unimodal size distribution were reprecipitated in the WL zone. The fine γ′ particles are spherical in shape, high in number density and characterized by an imbalanced chemistry, containing less Al, Ti, Ni, Ta γ′-forming elements but more Cr, Co, Mo γ-forming elements than all types of parent γ′ particles. As a result, a hard and strong WL zone was produced by the inertial friction welding.


• Microstructural investigation of the weld line for varied inertia friction welds of RR1000 has found that the morphology, energy status and chemistry of grain boundaries; the size, shape and composition of strengthening precipitates; the morphology and distribution of carbides and borides in the weld line zone are changed fundamentally. All these changes are compared to the parent alloy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 211, Issue 12, December 2011, Pages 1927–1936
نویسندگان
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