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Unyango olutsha lobushushu oluphuhliswe kwi-MIT lutshintsha i-microstructure ye-3D yesinyithi eprintiweyo, okwenza izinto zomelele kwaye zixhathise kwiimeko ezigqithisileyo ze-thermal.Obu buchwepheshe bunokwenza i-3D iprinte iiblades ezisebenza kakhulu kunye ne-vanes kwiiinjini zegesi kunye neenjini zejethi ezivelisa umbane, okwenza uyilo olutsha lokunciphisa ukusetyenziswa kwamafutha kunye nokusebenza kakuhle kwamandla.
Amagqabi eijini yerhasi yanamhlanje enziwa kusetyenziswa inkqubo yemveli yokugalela apho isinyithi esinyibilikisiweyo sigalelwa kwiimilo ezintsonkothileyo kwaye ziqiniswe ngokwecala.La malungu enziwe ngezinye zezona zinto zikwazi ukumelana nobushushu emhlabeni, njengoko ziyilelwe ukujikeleza ngesantya esiphezulu kwiigesi ezishushu kakhulu, zikhupha umsebenzi wokuvelisa umbane kwizixhobo zombane kunye nokubonelela ngeenjini zejethi.
Kukho umdla okhulayo wokuveliswa kwee-blades ze-turbine usebenzisa i-3D yoshicilelo, leyo, ngaphezu kweenzuzo zokusingqongileyo kunye nezoqoqosho, ivumela abavelisi ukuba bavelise ngokukhawuleza ama-blades kunye neejometri eziyinkimbinkimbi kunye neyonga amandla.Kodwa iinzame zokuprinta iiblade ze-iturbine ye-3D azikaphumeleli umqobo omnye omkhulu: ukurhubuluza.
Kwi-metallurgy, i-creep iqondwa njengesiqhelo sesinyithi ukonakala ngokungenakuguqulwa phantsi koxinzelelo oluqhubekayo lomatshini kunye nobushushu obuphezulu.Ngelixa abaphandi babephonononga ukuba kunokwenzeka ukuprinta ii-injini zokushicilela, bafumanisa ukuba inkqubo yokushicilela ivelisa iinkozo ezintle ukusuka kumashumi ukuya kumakhulu eemicrometers-i-microstructure ethandwa kakhulu ukukhasa.
"Ngokokusebenza, oku kuthetha ukuba i-turbine yegesi iya kuba nobomi obufutshane okanye ibe ngaphantsi kwezoqoqosho," kusho uZachary Cordero, uprofesa we-Boeing we-aerospace kwi-MIT."Ezi ziziphumo ezimbi ezinexabiso elikhulu."
I-Cordero kunye noogxa baye bafumanisa indlela yokuphucula ubume be-3D eprintiweyo ialloys ngokongeza inyathelo elongezelelweyo lokunyanga ubushushu eliguqula iinkozo ezintle zezinto eziprintiweyo zibe ziinkozo ezinkulu "zekholomu" - i-microstructure eyomeleleyo enciphisa amandla okukhwela kwezinto.izinto eziphathekayo kuba "iintsika" zihambelana ne-axis yoxinzelelo oluphezulu.Indlela echazwe namhlanje kwi-Additive Manufacturing ivula indlela yoshicilelo lwe-3D yoshishino lwee-blades ze-turbine yegesi, abaphandi bathi.
"Kwixesha elizayo elingekude, silindele ukuba abavelisi be-injini yegesi baprinte ii-blade zabo kwizityalo ezinkulu zokuvelisa ezongeziweyo kwaye emva koko baziqhubele phambili besebenzisa unyango lwethu lobushushu," utshilo uCordero."Ushicilelo lwe-3D luya kwenza ukuba ulwakhiwo olutsha lokupholisa olunokunyusa ukusebenza kakuhle kwee-injini zomoya, lubavumele ukuba bavelise umlinganiselo ofanayo wamandla ngelixa betshisa amafutha amancinci kwaye ekugqibeleni bakhuphe i-carbon dioxide encinci."
Uphononongo lukaCordero lubhalwe ngokubambisana ngababhali abakhokelayo uDominic Pichi, uChristopher Carter, kunye noAndres Garcia-Jiménez weMassachusetts Institute of Technology, u-Anugrahapradha Mukundan noMarie-Agatha Sharpan weYunivesithi yase-Illinois e-Urbana-Champaign, kunye noDonovan Leonard we-Oak. Ridge National Laboratory.
Indlela entsha yeqela luhlobo lwe-recrystallization ye-directional, unyango lobushushu oluhambisa izinto kwindawo eshushu kwizinga elilawulwa ngokuchanekileyo, ukuxubha iinkozo ezininzi ze-microscopic zezinto zibe ezinkulu, ezinamandla, iikristale ezifanayo.
I-recrystallization ye-Directional yaqanjwa ngaphezulu kweminyaka engama-80 eyadlulayo kwaye yasetyenziswa kwizinto ezinokukhubazeka.Kuphononongo lwabo olutsha, iqela le-MIT lifake i-recrystallization ejoliswe ngqo kwi-3D eprintiweyo ye-superalloys.
Iqela livavanye le ndlela kwi-3D eprintiweyo ye-nickel-superalloys, isinyithi esiqhele ukuphoswa kwaye sisetyenziswa kwiiinjini zegesi.Kuluhlu lwezilingo, abaphandi babeka iisampuli ze-3D eziprintiweyo ze-superalloys zentonga kwindawo yokuhlambela amanzi obushushu begumbi ngokuthe ngqo ngaphantsi kwe-coil induction.Bayitsalela kancinane intonga nganye emanzini baze bayigqithise kwikhoyili ngesantya esahlukileyo, befudumeza kakhulu ezo ntonga kumaqondo obushushu asusela kwi-1200 ukuya kwi-1245 ngokukaCelsius.
Baye bafumanisa ukuba ukutsala intonga ngesantya esithile (2.5 millimeters ngeyure) kunye nobushushu obuthile (1235 degrees Celsius) kudala iqondo lobushushu elinqanqazayo elibangela ukuba kubekho utshintsho kwimicrostructure ecolekileyo yoshicilelo.
"Izinto ezibonakalayo ziqala njengamasuntswana amancinci aneziphene ezibizwa ngokuba yi-dislocation, njenge-spaghetti eyaphukileyo," utshilo uCordero.“Xa utshisa i-material, ezi ziphene ziyanyamalala kwaye zakheke, kwaye iinkozo zinokukhula.ukutya okuziinkozo ngokufunxa izinto ezinesiphako neenkozo ezincinane—inkqubo ebizwa ngokuba yirecrystallization.”
Emva kokupholisa iintonga eziphathwe ngobushushu, abaphandi bavavanya i-microstructure yabo besebenzisa i-microscopes optical kunye ne-electron kwaye bafumanisa ukuba i-grains eprintiweyo ye-microscopic yezinto eziphathekayo yatshintshwa ngeenkozo "ze-columnar", okanye imimandla emide, efana nekristale eyayinkulu kakhulu kuneyokuqala. iinkozo..
"Sihlengahlengise ngokupheleleyo," utshilo umbhali okhokelayo uDominic Peach."Sibonisa ukuba sinokunyusa ubungakanani beenkozo ngee-odolo ezininzi zobukhulu ukwenza inani elikhulu leenkozo eziziinkozo, ezinokuthi zithiyori zikhokelele kuphuculo olubalulekileyo kwiipropathi ezirhubuluzayo."
Iqela liphinde labonisa ukuba liyakwazi ukulawula izinga lokutsala kunye nokushisa kweesampuli zentonga ukulungelelanisa iinkozo ezikhulayo zezinto eziphathekayo, ukudala imimandla yobukhulu obuziinkozo kunye nokuqhelaniswa.Eli nqanaba lolawulo linokuvumela abavelisi ukuba baprinte iiblade ze-iturbine kunye ne-microstructures yesayithi ethile enokuthi ilungelelaniswe kwiimeko ezithile zokusebenza, u-Cordero uthi.
I-Cordero iceba ukuvavanya unyango lobushushu lwe-3D eprintiweyo iindawo ezikufutshane neeblades ze-injini yomoya.Iqela likwajonge iindlela zokukhawulezisa amandla okuqina kunye nokuvavanya ukuxhathisa kwe-creep yezakhiwo eziphathwa ngubushushu.Emva koko bacingela ukuba unyango lobushushu lunokwenza usetyenziso olusebenzayo loshicilelo lwe-3D ukuvelisa iibhleyidi ze-iturbine zodidi lweshishini ezinemilo entsonkothileyo kunye neepateni.
"Ii-blades ezintsha kunye nejometri yeblade iya kwenza ii-injini zegesi ezisekwe emhlabeni kwaye, ekugqibeleni, iinjini zenqwelomoya zisebenzise amandla ngakumbi," utshilo uCordero."Ngokwembono esisiseko, oku kunokunciphisa ukukhutshwa kwe-CO2 ngokuphucula ukusebenza kwezi zixhobo."
Ixesha lokuposa: Nov-15-2022
