Journal
MATERIALS & DESIGN
Volume 30, Issue 10, Pages 3972-3978Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2009.05.033
Keywords
Welding; Non-ferrous metal
Categories
Funding
- JSPS
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In order to evaluate the properties of a friction stir welded Ni base alloy, Inconel 600 (single phase type) was selected. Sound friction stir welds without weld defect were obtained at 150 and 200 mm/min in welding speed, however, a groove like defect occurred at 250 mm/min. The electron back scattered diffraction (EBSD) method was used to analyze the grain boundary character distribution. As a result, dynamic recrystallization was observed at all conditions, and the grain refinement was achieved in the stir zone, and it was gradually accelerated from 19 mu m in average grain size of the base material to 3.4 mu m in the stir zone with increasing the welding speed. It also has an effect on the mechanical properties so that friction stir welded zone showed 20% higher microhardness and 10% higher tensile strength than those of base material. (C) 2009 Elsevier Ltd. All rights reserved.
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