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Title: Investigations on diffusion bonding of dissimilar materials
Researcher: Joseph, Fernandus M
Guide(s): Senthilkumar, T
Keywords: Aluminium Al alloys
diffusion bonding
dissimilar materials
Upload Date: 5-Aug-2014
University: Anna University
Completed Date: 01/10/2013
Abstract: Magnesium Mg and Aluminium Al alloys have good features such as low newlineDensity good damping characteristics dimensional stability machinability and low newlinecasting costs and hence have of late begun to attract greater attention in academic newlineresearch and industrial applications The research and application of Mg and Al alloys newlinehave been extended from navigation and military fields to civil products of high newlineadditional value such as automobile computer and communication equipment Mg and newlineAl alloys would achieve weight reduction and high efficiency of production if used as newlinesubstitutes for steel The principal difficulty when joining magnesium Mg and aluminium Allies in the existence of formation of oxide films and brittle intermetallic in the bond region However diffusion bonding can be used to join these alloys without much difficulty This thesis presents the procedures involved in constructing the diffusion bondingwindows such as TemperatureTime and Pressure Time diagrams for effective diffusionbonding of aluminium alloy and magnesium alloys The developed processing windowscan be used as reference maps to the design and welding engineers for selectingappropriate diffusion bonding parameters to get good quality bonds for Al and Mgalloys Empirical relationships were developed to predict the lap shear strength and newlinebonding strength of diffusion bonded joints of aluminium alloy AA6061 and newlinemagnesium alloys AZ31B AZ61A AZ80 incorporating diffusion bonding parameters newlinesuch as bonding temperature bonding pressure holding time and surface roughness of newlinethe materials to be joined Response surface methodology RSM was applied to newlinevi optimize the diffusion bonding parameters to attain the maximum shear strength and newlinebonding strength of the joint The relationships between the optimum process newlineparameters and the percentage of aluminium and zinc in magnesium alloys were newlineestablished The optimum process parameters can be evaluated by varying the percentage of aluminium in magnesium alloys The effect of process parameters such as bonding temperature bonding pressure holding time and surface roughness on shear strength bonding strength diffusion layer thickness and interface hardness were newlineanalyzed Optical Microscopy OM Scanning Electron Microscopy SEM Electron newlineDispersive Spectrum EDS and X ray Diffraction XRD techniques were used to newlinecharacterize the joints Nearly 100 dissimilar AZ31B Mg AA6061 Al AZ61A newlineMgAA6061 Al and AZ80 Mg AA6061 Al joints were prepared using diffusion newlinebonding process newline newline
Pagination: viii, 172p.
Appears in Departments:Faculty of Mechanical Engineering

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02_certificates.pdf6.09 MBAdobe PDFView/Open
03_abstract.pdf52.07 kBAdobe PDFView/Open
04_acknowledgement.pdf3 MBAdobe PDFView/Open
05_contents.pdf118.49 kBAdobe PDFView/Open
06_chapter 1.pdf269.43 kBAdobe PDFView/Open
07_chapter 2.pdf572.42 kBAdobe PDFView/Open
08_chapter 3.pdf2.7 MBAdobe PDFView/Open
09_chapter 4.pdf3.38 MBAdobe PDFView/Open
10_chapter 5.pdf6.51 MBAdobe PDFView/Open
11_chapter 6.pdf14.93 MBAdobe PDFView/Open
12_chapter 7.pdf5.39 MBAdobe PDFView/Open
13_chapter 8.pdf108.59 kBAdobe PDFView/Open
14_references.pdf148.84 kBAdobe PDFView/Open
15_publications.pdf108.51 kBAdobe PDFView/Open
16_vitae.pdf57.08 kBAdobe PDFView/Open

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