819 19 archive 4031 disk0/00/00/08/19 2011-11-08 16:17:28 2019-01-23 09:52:55 2011-11-08 16:19:12 thesis show 0 Kitaguchi Hiroto Jones Ian P. ftp://ubira.bham.ac.uk/eTheses/Embargoes_strictly_CONFIDENTIAL/Kitaguchi_H_2011_etheses819_embargo_expires_Feb2014/ University of Birmingham unpub T1 TN 10col_ephy Embargo expires after Feb 2014. Author says OK to release e-copy at the same time. Precipitation hardening Ni based superalloys have been widely used in gas turbine engine components owing to their stable microstructure at high temperature. To assemble these components, joining technology is necessary and friction welding is used for the joints which are suitable for large component welding, taking advantage of its superior mechanical properties compared to fusion welding. Inertia friction welded RR1000 and Inconel718 microstructure was studied. In this study, grain boundaries were intensively characterized to rationalize the intergranular susceptible area from the microstructure point of view. 2011-07 2010-08 graduation eng author unchecked This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. none 316 University of Birmingham School of Metallurgy and Materials d_ph na 2011-07 graduation