Izinhlangano ezingenzi nzuzo, abezindaba, kanye nomphakathi bangadawuniloda izithombe kuwebhusayithi ye-MIT Press Office ngaphansi kwe-Creative Commons Attribution okungezona ezohwebo, ilayisense engaphumi.Akumele uguqule izithombe ezinikeziwe, zinciphise kuphela zibe usayizi olungile.Amakhredithi kufanele asetshenziswe lapho kukopishwa izithombe;Ikhredithi ye-“MIT” yezithombe ngaphandle kokuthi kuboniswe ngezansi.
Ukwelashwa okusha kokushisa okuthuthukisiwe kwa-MIT kushintsha i-microstructure yezinsimbi eziphrintiwe ze-3D, okwenza izinto zibe namandla futhi zimelane nezimo ezishisayo.Lobu buchwepheshe bungavumela ukuphrinta kwe-3D kwama-blade nama-vanes asebenza kahle kakhulu ezinjinini zegesi nezinjini zejethi ezikhiqiza ugesi, okuvumela imiklamo emisha ukunciphisa ukusetshenziswa kukaphethiloli kanye nokusebenza kahle kwamandla.
Izindwani zanamuhla ze-turbine yegesi zenziwa kusetshenziswa inqubo evamile yokuphonsa lapho insimbi encibilikisiwe ithululelwa emimoyeni eyinkimbinkimbi futhi iqiniswe ngendlela eqondile.Lezi zingxenye zenziwe ngezinye zezingxube zensimbi ezikwazi ukumelana nokushisa kakhulu emhlabeni, njengoba ziklanyelwe ukujikeleza ngesivinini esikhulu kumagesi ashisa kakhulu, zikhiphe umsebenzi wokukhiqiza ugesi ezitshalweni zikagesi futhi zinikeze amandla ezinjini zejethi.
Kukhona isithakazelo esikhulayo ekukhiqizweni kwama-turbine blades kusetshenziswa ukuphrinta kwe-3D, okuthi, ngaphezu kwezinzuzo zemvelo nezomnotho, kuvumela abakhiqizi ukuthi bakhiqize ngokushesha ama-blade anejometri eyinkimbinkimbi futhi eyonga amandla.Kodwa imizamo yokuphrinta i-3D turbine blades ayikakwazi ukunqoba isithiyo esisodwa esikhulu: ukukhasa.
Nge-metallurgy, i-creep iqondwa njengokuthambekela kwensimbi ukonakala ngendlela engenakulungiseka ngaphansi kwengcindezi eqhubekayo yemishini kanye nezinga lokushisa eliphezulu.Ngesikhathi abacwaningi behlola ukuthi kungenzeka yini ukunyathelisa izindwani zomshini wokunyathelisa, bathola ukuthi inqubo yokunyathelisa ikhiqiza okusanhlamvu okuhle okusukela kumashumi kuya kumakhulu ama-micrometer—isakhiwo esincane esivame ukukhasa.
"Eqinisweni, lokhu kusho ukuthi i-turbine yegesi izoba nempilo emifushane noma ibe nomnotho omncane," kusho uZachary Cordero, uprofesa we-Boeing we-aerospace e-MIT."Lena imiphumela emibi ebizayo."
I-Cordero nozakwabo bathole indlela yokuthuthukisa ukwakheka kwama-alloys aphrintiwe e-3D ngokwengeza isinyathelo esengeziwe sokwelashwa kokushisa esishintsha izinhlamvu ezinhle zezinto eziphrintiwe zibe izinhlamvu ezinkulu “zekholomu” – i-microstructure enamandla enciphisa amandla okukhasa kwezinto.impahla ngoba "izinsika" zihambisana ne-axis yokucindezeleka okukhulu.Indlela evezwe namuhla ku-Additive Manufacturing ivula indlela yokuphrinta kwe-3D yezimboni zezinsimbi ze-turbine yegesi, kusho abacwaningi.
"Esikhathini esizayo esiseduze, silindele ukuthi abakhiqizi be-turbine yegesi baphrinte ama-blade abo ezitshalweni ezinkulu zokukhiqiza izithasiselo bese bewacubungula besebenzisa ukwelashwa kwethu kokushisa," kusho u-Cordero."Ukuphrinta kwe-3D kuzovumela izakhiwo zokupholisa ezintsha ezingakhuphula ukusebenza kahle kwezinjini zomoya, zikwazi ukukhiqiza amandla afanayo kuyilapho zishisa uphethiloli omncane futhi ekugcineni zikhiphe isikhutha esincane."
Ucwaningo lukaCordero lwabhalwa ngokuhlanganyela ngababhali abahamba phambili uDominic Pichi, uChristopher Carter, no-Andres Garcia-Jiménez weMassachusetts Institute of Technology, u-Anugrahapradha Mukundan noMarie-Agatha Sharpan baseNyuvesi yase-Illinois e-Urbana-Champaign, kanye noDonovan Leonard we-Oak. I-Ridge National Laboratory.
Indlela entsha yeqembu iwuhlobo lokuqondisa kabusha kwekristalu, ukwelashwa kokushisa okuhambisa izinto endaweni eshisayo ngenani elilawulwa ngokunembile, kuhlanganisa izinhlamvu ezincane zentokozo zibe amakristalu amakhulu, aqinile, afanayo.
Ukulungiswa kabusha kwe-Directional kwasungulwa eminyakeni engama-80 edlule futhi kwasetshenziswa ezintweni ezigogekayo.Ocwaningweni lwabo olusha, ithimba le-MIT lifake isicelo sokuvuselela kabusha okuqondisiwe kuma-superalloy aphrintiwe we-3D.
Ithimba lihlole le ndlela kuma-superalloys asuselwa ku-nickel aphrintiwe e-3D, izinsimbi ezivame ukuphonswa futhi ezisetshenziswa kumaturbine egesi.Ochungechungeni lokuhlola, abacwaningi babeke amasampula e-3D-ephrintiwe ama-superalloy afana nenduku endaweni yokugeza yamanzi enezinga lokushisa legumbi ngqo ngaphansi kwekhoyili yokungeniswa.Bakhipha induku ngayinye emanzini kancane kancane futhi bayidlulisa kukhoyili ngesivinini esihlukile, bashisisa kakhulu izinduku emazingeni okushisa asukela ku-1200 kuya ku-1245 degrees Celsius.
Bathole ukuthi ukudonsa induku ngesivinini esithile (amamilimitha angu-2.5 ngehora) kanye nezinga lokushisa elithile (1235 degrees Celsius) kudala ukukhuphuka kwezinga lokushisa okubangela ukuguquka kwesakhiwo esincane esicolekile semidiya yokuphrinta.
"Izinto ziqala ziyizinhlayiya ezincane ezinokukhubazeka okubizwa ngokuthi ama-dislocation, njenge-spaghetti ephukile," kuchaza u-Cordero.“Uma ushisa insimbi, lezi zici ziyanyamalala futhi zakheke kabusha, nokukhula okusanhlamvu.okusanhlamvu ngokumunca izinto ezingcolile nezinhlamvu ezincane—inqubo ebizwa ngokuthi i-recrystallization.”
Ngemuva kokupholisa izinti eziphethwe ukushisa, abacwaningi bahlola i-microstructure yabo besebenzisa i-optical kanye ne-electron microscopes futhi bathola ukuthi izinhlamvu ezincane eziphrintiwe zezinto ezibonakalayo zathathelwa indawo izinhlamvu "zekholomu", noma izifunda ezinde, ezifana nekristalu ezazinkulu kakhulu kunezokuqala. okusanhlamvu..
"Sihlele kabusha ngokuphelele," kusho umbhali oholayo uDominic Peach."Sikhombisa ukuthi singakwazi ukukhulisa usayizi wokusanhlamvu ngama-oda amaningana wobukhulu ukuze sakhe inani elikhulu lezinhlamvu zekholomu, okufanele ngokwembono ziholele ekuthuthukisweni okukhulu kwezakhiwo ezinwabuzelayo."
Ithimba liphinde labonisa ukuthi lingakwazi ukulawula izinga lokudonsa kanye nezinga lokushisa lamasampuli enduku ukuze kulungiswe kahle izinhlamvu ezikhulayo zezinto, ukudala izifunda zosayizi othize wokusanhlamvu nokuma kwawo.Leli zinga lokulawula lingavumela abakhiqizi ukuthi baphrinte ama-turbine blades anama-microstructures aqondene nesayithi angavunyelaniswa nezimo ezithile zokusebenza, kusho u-Cordero.
I-Cordero ihlela ukuhlola ukwelashwa kokushisa kwezingxenye eziphrintiwe ze-3D eduze kwama-turbine blades.Ithimba liphinde libheke izindlela zokusheshisa amandla aqinile kanye nokuhlola ukumelana nokushisa kwezakhiwo eziphathwa ukushisa.Bese beqagela ukuthi ukwelashwa kokushisa kungavumela ukusetshenziswa okungokoqobo kokuphrinta kwe-3D ukukhiqiza izindwani ze-turbine zebanga lezimboni ezinobumo namaphethini ayinkimbinkimbi.
"Ama-blade amasha kanye ne-blade geometry kuzokwenza izinjini zegesi ezisekelwe phansi futhi, ekugcineni, izinjini zezindiza zonge amandla," kusho u-Cordero."Ngokombono oyisisekelo, lokhu kunganciphisa ukukhishwa kwe-CO2 ngokuthuthukisa ukusebenza kahle kwalawa madivayisi."
Isikhathi sokuthumela: Nov-15-2022
