{"id":{"repo_id":"birmingham","oai_identifier":"oai:etheses.bham.ac.uk:1380"},"canonical_url":"https://search.dev.ndltd.org/etd/birmingham/oai:etheses.bham.ac.uk:1380","repository":{"repo_id":"birmingham","name":"University of Birmingham","base_url":"https://etheses.bham.ac.uk/cgi/oai2"},"display":{"title":"The machinability of a gamma titanium aluminide intermetallic","abstract":"The work reported details the machinability of the gamma titanium aluminide intermetallic (-TiAl) Ti-45Al-8Nb-0.2C currently under evaluation to be the material of choice for blades and stators in the intermediate compressor (IP) and low pressure (LP) turbine sections of an aeroengine due to the alloys high temperature (~800C) and low weight properties. Following a literature review, the thesis details the results from two phases of experimental work. The first focused on high speed milling trials using coated tungsten carbide ball nose end mills with various operating parameters whilst the second phase provided an assessment of intermittent dress creep feed grinding using both conventional (SiC) and superabrasive (diamond and CBN) wheels with free jet nozzles. Benchmarking of the -TiAl alloy against other -TiAl (Ti-45Al-2Mn-2Nb +0.8%vol. TiB2), burn resistant and conventional titanium (Ti-6Al-4V) alloys was also performed. Full and fractional factorial (Taguchi) experimental designs were employed to identify the effect of key operating factors and levels on output measures (tool life/wheel wear, forces, power, and workpiece surface roughness). Taguchi main effect plots are detailed, together with Analysis of Variance (ANOVA) data and percentage contribution ratio (PCR) values. In addition, workpiece surface integrity evaluation including assessment of microstructure and microhardness is also presented..","abstract_html":"The work reported details the machinability of the gamma titanium aluminide intermetallic (-TiAl) Ti-45Al-8Nb-0.2C currently under evaluation to be the material of choice for blades and stators in the intermediate compressor (IP) and low pressure (LP) turbine sections of an aeroengine due to the alloys high temperature (~800C) and low weight properties. Following a literature review, the thesis details the results from two phases of experimental work. The first focused on high speed milling trials using coated tungsten carbide ball nose end mills with various operating parameters whilst the second phase provided an assessment of intermittent dress creep feed grinding using both conventional (SiC) and superabrasive (diamond and CBN) wheels with free jet nozzles. Benchmarking of the -TiAl alloy against other -TiAl (Ti-45Al-2Mn-2Nb +0.8%vol. TiB2), burn resistant and conventional titanium (Ti-6Al-4V) alloys was also performed. Full and fractional factorial (Taguchi) experimental designs were employed to identify the effect of key operating factors and levels on output measures (tool life/wheel wear, forces, power, and workpiece surface roughness). Taguchi main effect plots are detailed, together with Analysis of Variance (ANOVA) data and percentage contribution ratio (PCR) values. In addition, workpiece surface integrity evaluation including assessment of microstructure and microhardness is also presented..","abstract_has_math":false,"creators":["Hood, Richard"],"institution":"University of Birmingham","degree_name":"d_ph","degree_level":"d_ph","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2010,"date_issued":"2010-07","date_published":"2010-07","updated_at":"2026-07-24T01:11:29Z","subjects":["TJ Mechanical engineering and machinery"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.sponsor","label":"Sponsor","values":["epsrc"]},{"key":"dc:creator","label":"Author","values":["Hood, Richard"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2010-07"]},{"key":"dc:date.issued","label":"Date","values":["2010-07"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["College of Engineering & Physical Sciences","School of Engineering, Department of Mechanical Engineering"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Birmingham"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["http://etheses.bham.ac.uk//id/eprint/1380/"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["d_ph"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["d_ph"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["TJ Mechanical engineering and machinery"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://etheses.bham.ac.uk//id/eprint/1380/1/Hood_10_PhD.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The work reported details the machinability of the gamma titanium aluminide intermetallic (-TiAl) Ti-45Al-8Nb-0.2C currently under evaluation to be the material of choice for blades and stators in the intermediate compressor (IP) and low pressure (LP) turbine sections of an aeroengine due to the alloys high temperature (~800C) and low weight properties. Following a literature review, the thesis details the results from two phases of experimental work. The first focused on high speed milling trials using coated tungsten carbide ball nose end mills with various operating parameters whilst the second phase provided an assessment of intermittent dress creep feed grinding using both conventional (SiC) and superabrasive (diamond and CBN) wheels with free jet nozzles. Benchmarking of the -TiAl alloy against other -TiAl (Ti-45Al-2Mn-2Nb +0.8%vol. TiB2), burn resistant and conventional titanium (Ti-6Al-4V) alloys was also performed. Full and fractional factorial (Taguchi) experimental designs were employed to identify the effect of key operating factors and levels on output measures (tool life/wheel wear, forces, power, and workpiece surface roughness). Taguchi main effect plots are detailed, together with Analysis of Variance (ANOVA) data and percentage contribution ratio (PCR) values. In addition, workpiece surface integrity evaluation including assessment of microstructure and microhardness is also presented.."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["The machinability of a gamma titanium aluminide intermetallic"]}]}],"canonical_facts":{"dc:contributor.sponsor":["epsrc"],"dc:creator":["Hood, Richard"],"dc:date":["2010-07"],"dc:date.issued":["2010-07"],"dc:description.abstract":["The work reported details the machinability of the gamma titanium aluminide intermetallic (-TiAl) Ti-45Al-8Nb-0.2C currently under evaluation to be the material of choice for blades and stators in the intermediate compressor (IP) and low pressure (LP) turbine sections of an aeroengine due to the alloys high temperature (~800C) and low weight properties. Following a literature review, the thesis details the results from two phases of experimental work. The first focused on high speed milling trials using coated tungsten carbide ball nose end mills with various operating parameters whilst the second phase provided an assessment of intermittent dress creep feed grinding using both conventional (SiC) and superabrasive (diamond and CBN) wheels with free jet nozzles. Benchmarking of the -TiAl alloy against other -TiAl (Ti-45Al-2Mn-2Nb +0.8%vol. TiB2), burn resistant and conventional titanium (Ti-6Al-4V) alloys was also performed. Full and fractional factorial (Taguchi) experimental designs were employed to identify the effect of key operating factors and levels on output measures (tool life/wheel wear, forces, power, and workpiece surface roughness). Taguchi main effect plots are detailed, together with Analysis of Variance (ANOVA) data and percentage contribution ratio (PCR) values. In addition, workpiece surface integrity evaluation including assessment of microstructure and microhardness is also presented.."],"dc:format":["application/pdf"],"dc:identifier.uri":["http://etheses.bham.ac.uk//id/eprint/1380/1/Hood_10_PhD.pdf"],"dc:publisher.department":["College of Engineering & Physical Sciences","School of Engineering, Department of Mechanical Engineering"],"dc:publisher.institution":["University of Birmingham"],"dc:relation.isreferencedby":["http://etheses.bham.ac.uk//id/eprint/1380/"],"dc:subject":["TJ Mechanical engineering and machinery"],"dc:title":["The machinability of a gamma titanium aluminide intermetallic"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["d_ph"],"dc:type.qualificationname":["d_ph"]},"updated_at":"2026-07-24T01:11:29Z"}