Titanium alloys yog cov cuab yeej tseem ceeb rau cov ntaub ntawv ntau, los ntawm Aerospace thiab lub zog infrastructure rau biomedical pab kiag li lawm. Raws li nrog feem ntau cov hlau, ua kom zoo titanium qhov kev ua tau zoo feem ntau cuam tshuam nrog kev lag luam tawm ntawm ob lub zog tseem ceeb: lub zog thiab ductility. Cov khoom muaj zog zog zoo li yuav tsis tshua muaj deformable, thaum lub sijhawm deformable zoo li yuav muaj cov neeg siv tshuab tsis muaj zog.
Tsis ntev los no, cov kws tshawb nrhiav ntawm lub koom haum thev naus laus zis (MIT), hauv kev koom tes nrog cov ntaub ntawv ntawm ATI cov ntaub ntawv tshwj xeeb, nrhiav tau ib txoj hauv kev los tsim cov khoom tshiab titanium. Hom no tuaj yeem tsim cov tshiab titanium alloys nrog kev sib xyaw ua ke ntawm superior zog thiab ductility, uas tuaj yeem ua rau cov ntawv thov tshiab. Qhov kev tshawb pom tau raug tshaj tawm hauv phau ntawv sau ua haujlwm tshaj tawm.
Pab neeg hais tias cov kev txhim kho ntawm cov tshuaj lom neeg cov tshuaj lom neeg thiab cov qauv ntxim nyiam ntawm cov qauv ntawm cov alloy, nrog rau kev ua haujlwm. Titanium alloys, piv txwv li, yog qhov tseem ceeb vim lawv cov khoom siv kho mob corrosion thiab lub teeb hnyav piv rau cov hlau. Cov qauv muaj ntau yam uas tuaj yeem tsim los ntawm kev tiv thaiv ceevfaj thiab lawv cov ntaub ntawv txheeb ze, nrog rau cov khoom siv tsawg thiab kub siab, tsim cov khoom lag luam qis thiab siab tau txais kev sib xyaw ua ke zoo.
Kev xaiv ntawm alloying cov proportions yuav tsum tau ua los ntawm cov txheej txheem los tsim cov khoom lag luam uas ua tau raws li cov ntawv thov thiab cov kev xav tau tshwj xeeb. Kev tshawb xyuas thiab kev sim piav qhia hauv txoj kev tshawb fawb no tau muab txoj hauv kev zoo li no.
Raws li cov kws tshawb nrhiav, lub tswv yim tseem ceeb ntawm cov kev tsim qauv no yog los txiav txim siab sib txawv. Ib qho ntsuas yog cov qauv ntawm ib lub lead ua tib. Piv txwv li, los ntawm kev xaiv ua tib zoo xaiv, ib qho kev pom zoo dua Alpha-Phasle Crystal qauv tuaj yeem tau txais, tso cai rau kev cuam tshuam tshwj xeeb. Lwm yam ntsuas yog cov polycrystalline nplai, uas cuam tshuam nrog kev sib cuam tshuam ntawm - thiab -phases. Yog li, cov hau kev ua raws li no muaj kev txiav txim siab tsim qauv rau ob qho tib si.
Ntxiv rau xaiv cov khoom siv alloy zoo thiab ntsuas, ua cov txheej txheem ua kuj tseem ua lub luag haujlwm tseem ceeb. Cov kws tshawb nrhiav pom tias cov txheej txheem hu ua "hla-rolling" yog qhov tseem ceeb rau kev ua tiav kev sib xyaw ua ke ntawm lub zog thiab ductility. Ntau yam deformed alloys tau kuaj nyob rau hauv lub tshuab hluav taws xob ntsuas hluav taws xob, qhia cov ntsiab lus ntawm seb lawv cov microstructure teb rau sab nraud neeg siv khoom siv. Ib qho txheej txheem tshwj xeeb ntawm cov lej, ib feem ntawm cov qauv ua rau muaj kev sib tsoo, txo qhov kev sib tw ua rau muaj kev sib tsoo, thiab theem-sib haum xeeb tsis zoo. Qhov kev teb tshaj tawm no rau deformation tuaj yeem tsim cov ntaub ntawv zoo dua.
Cov qauv ntawm cov khoom siv tau pom kom nkag siab ob theem thiab lawv morphology. Lawv cov tshuaj lom neeg tau pom los ntawm kev tsom xam hauv zos ntawm ib qho atomic nplai. Muaj ntau cov tswv yim ua haujlwm tau ua haujlwm kom ntev li ntau cov khoom ntawm cov ntaub ntawv ntawm ntau qhov ntev teev. Thaum saib ntawm cov khoom siv tag nrho ntawm titanium alloys ua raws li lawv lub system, nws tau pom tias cov khoom no tau zoo dua.
Cov kws tshawb nrhiav hais tias qhov no yog kev tshawb fawb kev lag luam txhawb nqa ntawm kev tsim cov qauv kev tsim qauv ntawm cov lag luam muaj alloys. Lub hom phiaj ntawm kev koom tes yog kom tau txais txiaj ntsig kev nkag siab txog cov plasticity ntawm cov muaju. Lub tswv yim tsim muaj pov thawj ua haujlwm zoo, kev tshawb fawb pom tias nws ua haujlwm li cas, tab sis tseem muaj ntau chav rau kev txhim kho.
