粗层片原始组织的TC11钛合金热变形行为及其热压缩工艺参数优化(英文)

粗层片原始组织的TC11钛合金热变形行为及其热压缩工艺参数优化(英文)In recent years, there has been increased interest in the use of

TC11 粗层片原始组织的钛合金热变形行为及其热压 () 缩工艺参数优化英文 Inrecentyears,therehasbeenincreasedinterestintheuseof titaniumalloysduetotheirexcellentmechanicalandphysical properties.Onesuchalloy,TC11,hasgainedpopularityduetoits highstrength-to-weightratioandgoodcorrosionresistance.In ordertoimprovethemechanicalpropertiesofTC11,itisessential tostudyitshotdeformationbehavior,whichisthefocusofthis study. Inthisstudy,thehotdeformationbehaviorofTC11was investigatedusingcoarse-grainedspecimens.Thespecimenswere preparedbyannealingthealloyat950°Cfor1hourfollowedby aircooling.ThedeformationwascarriedoutusingaGleeble-1500 machineattemperaturesrangingfrom850to1100°Candstrain ratesrangingfrom0.01to10s-1.Thedeformationbehaviorwas characterizedbyanalyzingtheflowcurves,microstructures,and textureevolution. Theresultsshowedthatthehotdeformationbehaviorof TC11wassignificantlyaffectedbythedeformationtemperature andstrainrate.Atlowertemperatures(850-950°C),thealloy exhibitedastrainhardeningbehavior,whileathigher temperatures(1000-1100°C),adynamicrecrystallization mechanismdominatedthedeformationbehavior.Atintermediate temperatures(950-1000°C),acombinationofthesetwo mechanismswasobserved. Themicrostructuralanalysisrevealedthatthedeformation temperatureandstrainratesignificantlyaffectedthegrainsize anddistribution.Athighertemperaturesandlowerstrainrates, thegrainsizewaslargerandmoreuniform,whileatlower temperaturesandhigherstrainrates,thegrainsizewassmaller andmoreheterogeneous. Inordertooptimizethehotdeformationparameters,a responsesurfacemethodology(RSM)wasapplied.TheRSMwas usedtodevelopmathematicalmodelstopredicttheflowstress andoptimizethedeformationparametersforTC11.Theresults revealedthattheoptimaldeformationparameterswerea temperatureof1050°Candastrainrateof1s-1.