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dc.contributor.supervisor Chaturvedi, Mahesh (Mechanical and Manufacturing Engineering) Ojo, Olanrewaju (Mechanical and Manufacturing Engineering) en_US
dc.contributor.author Amegadzie, Mark Yao
dc.date.accessioned 2012-07-27T17:24:01Z
dc.date.available 2012-07-27T17:24:01Z
dc.date.issued 2012-07-27
dc.identifier.uri http://hdl.handle.net/1993/8125
dc.description.abstract Inconel 738, which is a nickel base superalloy used for hot section components of aircraft and industrial turbines is difficult to fabricate and repair by fusion welding due to its susceptibility to heat affected zone (HAZ) intergranular cracking. Crack-free joining of the difficult-to-weld alloy is currently achieved by using linear friction welding (LFW). Nevertheless, oxidation along the joint during LFW is a major problem. Information about the effect of process parameters on the microstructural evolution of linear friction welded nickel base alloys is very limited. In this work, the effect of forging pressure on the microstructure of linear friction welded Inconel 738 was studied. The results as elucidated in this work showed that increased forging pressure caused strain-induced rapid solidification of metastable liquid, which resulted in complete elimination of deleterious liquid phase oxides in bonded material contrasting the generally accepted view that assumes extrusion of solid state oxides during LFW. en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject Friction welding en_US
dc.subject Forging pressure en_US
dc.subject Oxidation en_US
dc.subject Nickel superalloy en_US
dc.subject Re-solidified eutectics en_US
dc.subject Inconel 738 en_US
dc.subject Recrystallization en_US
dc.subject Weld temperature en_US
dc.subject Vacancy diffusion en_US
dc.subject Pipe diffusion en_US
dc.title Effect of forging pressure on the microstructure of linear friction welded Inconel 738 superalloy en_US
dc.type info:eu-repo/semantics/masterThesis
dc.degree.discipline Mechanical and Manufacturing Engineering en_US
dc.contributor.examiningcommittee Richards, Norman (Mechanical and Manufacturing Engineering) Shalaby, Ahmed (Civil Engineering) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note October 2012 en_US


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