Cov kws tshawb fawb ntawm RMIT thiab University of Sydney, koom tes nrog Hong Kong Polytechnic University thiab Manufacturing Intelligence division of Swedish software developer Hexagon, tau ua tiav cov khoom siv titanium alloy tshiab. Qhov kev tshawb fawb tau ua tiav no qhib qhov muaj peev xwm tshiab rau kev siv cov titanium alloys hauv ntau qhov chaw thiab muab cov txiaj ntsig zoo rau kev ua tiav ntawm txoj kev tsim khoom ruaj khov dua.
△Schematic daim duab ntawm lub microstructure ntawm titanium alloy luam tawm los ntawm laser qhia lub zog deposition 3D
Qhov tshiab 3D luam titanium alloy ua li cas?
Qhov no titanium alloy muaj zog, malleable, adjustable thiab sustainable. Tus nqi ntawm kev tsim cov titanium alloys yog siab, thiab qhov kev tshawb fawb no muaj peev xwm ua tau zoo tshiab titanium alloys nrog kev siv hauv aerospace, biomedicine, chemical engineering, chaw thiab lub zog, thiab lwm yam.
Pab neeg tshawb fawb siv kev sib xyaw ua ke ntawm cov hlau thiab 3D luam ntawv txheej txheem tsim rau 3D luam tawm cov titanium alloy tshiab no los ntawm cov hmoov hlau siv laser qhia lub zog deposition (L-DED) technology. Cov txheej txheem tsim tshiab no ua rau kev tsim cov titanium alloys ruaj khov thiab pheej yig dua.
△Tingting Song (sab laug) thiab Ma Qian (sab xis)
Tus thawj coj tshawb fawb xibfwb Ma Qian los ntawm RMIT University tau hais tias lawv suav nrog lub tswv yim ntawm kev lag luam ncig rau hauv kev tsim. Cov hlau tshiab tuaj yeem tsim tau siv cov khoom seem thiab qib qis, tsis muaj nqi ntxiv xws li vanadium thiab txhuas, tab sis nrog pheej yig thiab ntau cov pa oxygen thiab hlau.
"Kev rov siv cov khoom pov tseg thiab cov khoom siv tsis zoo muaj peev xwm ntxiv cov txiaj ntsig kev lag luam thiab txo cov pa roj carbon ntau ntawm kev lag luam titanium," piav qhia xibfwb Qian.
Txoj kev tshawb no tus thawj coj yog Tingting Song, PhD cov tub ntxhais kawm ntawm RMIT. Nws hais tias pab pawg yog nyob rau theem tseem ceeb los ntawm kev lees paub lawv lub tswv yim tshiab kom ua tiav cov ntawv thov kev lag luam.
Nkauj hais ntxiv: "Peb muaj laj thawj zoo siab tias 3D luam ntawv muaj ib txoj hauv kev sib txawv ntawm kev ua cov hlau tshiab nrog cov txiaj ntsig zoo ntawm cov txheej txheem ib txwm muaj. Nws muaj lub sijhawm zoo rau kev lag luam kom tau txais txiaj ntsig ntawm peb txoj kev." Rov qab siv cov pov tseg ferro-titanium daim txhuam cev, "off-spec" rov ua dua cov pa oxygen titanium hmoov, los yog titanium hmoov ua los ntawm cov pa roj ntau titanium.
△ Cov ntawv tshawb fawb tau luam tawm hauv phau ntawv journal "Nature", thiab cov npe tshawb fawb yog "Realizing Strong and Tough Iron Titanium Oxide Alloys Through 3D Printing Manufacturing"
Kev sib tw hauv kev tsim cov alloys tshiab
Pab pawg neeg alloy muaj ob hom titanium crystals, sib tov ntawm alpha-titanium theem thiab beta-titanium theem, hu ua Ti-6Al-4V. Txhua daim ntawv sib raug rau ib qho kev npaj ntawm atoms.
Ti-6Al-4V yog cov titanium alloy ntau tshaj plaws, siv 6 feem pua aluminium thiab 4 feem pua vanadium hauv cov txheej txheem tsim khoom ib txwm muaj, suav txog ntau dua 50 feem pua ntawm titanium alloy kev lag luam. Txoj kev tshawb no tshiab tau siv cov pa oxygen thiab hlau es tsis yog txhuas thiab vanadium. Ntxiv nrog rau qhov yooj yim muaj thiab tus nqi qis, cov ntsiab lus no yog ob qho zoo tshaj plaws stabilizers thiab ntxiv dag zog rau -titanium thiab -titanium theem.
Raws li kev lig kev cai, titanium alloys uas muaj qib siab ntawm titanium thiab oxygen tau ntsib txoj kev loj hlob thiab kev saws me nyuam.
Qian tau hais tias: "Ib qho kev sib tw yog cov pa oxygen, uas tau piav qhia tias yog 'titanium's kryptonite', ua rau titanium ua nkig; lwm qhov kev sib tw yog qhov sib ntxiv ntawm cov hlau tuaj yeem ua rau muaj qhov tsis xws luag hauv morphology ntawm cov nplooj ntawv loj ntawm -titanium theem."
△ Pab pawg tau ua tiav tiav 3D luam ntawv ntawm atomic-theem microstructure ntawm - theem interface ntawm cov hlau tshiab los ntawm laser qhia lub zog tso nyiaj (L-DED) thev naus laus zis
Siv L-DED 3D luam ntawv thev naus laus zis ua rau cov kws tshawb fawb kom ua tiav cov kev sib tw
L-DED 3D luam ntawv feem ntau yog siv los tsim qhov loj thiab nyuaj, thiab nws tso cai rau cov kws tshawb fawb los kho cov khoom siv ntawm cov hlau. Lawv ua tiav hauv kev tsim cov nanoscale titanium crystals hauv cov hlau nrog kev tswj xyuas meej ntawm kev faib cov pa oxygen thiab hlau atoms. Qhov no ua rau qee qhov chaw ntawm cov alloy muaj zog heev, thaum lwm tus yog ductile, kom ntseeg tau tias cov khoom tsis nkig thaum muaj kev ntxhov siab.
Pab pawg tau siv DED module hauv Hexagon's Simufact Vuam software rau 3D luam tawm thiab sim cov khoom ntawm cov khoom zoo li no. Tom qab kev sim, cov kws tshawb fawb pom tias lawv cov hlau sib piv rau lwm cov khoom lag luam titanium alloys hauv ductility thiab lub zog.
Co-lead kws tshawb fawb xibfwb Simon Ringer los ntawm University of Sydney piav qhia tias: "Qhov tseem ceeb ua kom muaj zog yog qhov tshwj xeeb ntawm cov pa oxygen thiab hlau atoms ntawm thiab nyob rau hauv alpha-titanium thiab beta-titanium theem. -oxygen cheeb tsam thiab cov cheeb tsam uas muaj cov pa oxygen tsawg, tso cai rau peb los tswj cov atomic bonding hauv zos thiab yog li txo cov teeb meem brittleness.
