Please use this identifier to cite or link to this item:
Title: The contribution of eutectic liquid film to the TMAZ microfissuring in intertia friction welded PM RR1000 superalloy
Authors: Oluwasegun, K. M.
Olorunniwo, O. E.
Oluwole, O. O.
Keywords: Nickel alloys
Issue Date: 2010
Publisher: The Nigerian Institution of Mechanical Engineers
Abstract: The microstructure of the base alloy and thermomechanical affected zone (TMAZ) of inertia friction welded powder metallurgy (PM) RR1000 were examined by the use of standard metallogrphic techniques involving optical, analytical scanning transmission electron microscopes equipped with energy dispersive spectometer and an electron probe micro analyser. It was discovered that liquation of grain boundary phases present in the pre-weld alloy resulted in the formation of eutectic type ƴ-ƴ1 solute rich liquid film predominant in the TMAZ regions whic contributed significantly to micro fissuring during welding. It was found that apart from the effect of rapid precipitation of ƴ particles on the TMAZ cracking as has been widely reported, constitutinal liquidation of ƴ particles was a notable part of liquidation process which promoted the susceptibility of TMAZ to microcracking.
ISSN: 2141-2939
Appears in Collections:scholarly works

Files in This Item:
File Description SizeFormat 
(39)ui_art_oluwasegun_contribution_2010.pdf2.34 MBAdobe PDFThumbnail

Items in UISpace are protected by copyright, with all rights reserved, unless otherwise indicated.