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Phekolo e ncha ea mocheso e ntlafalitsoeng ho MIT e fetola microstructure ea litšepe tse hatisitsoeng tsa 3D, e etsa hore thepa e be matla le ho hanyetsa maemo a feteletseng a mocheso.Theknoloji ena e ka nolofalletsa khatiso ea 3D ea li-blades le li-vanes tse sebetsang hantle bakeng sa li-turbine tsa khase le li-jet dienjini tse fehlang motlakase, e leng se nolofalletsang meralo e mecha ho fokotsa tšebeliso ea mafura le matla a matla.
Li-blades tsa kajeno tsa turbine ea khase li etsoa ka mokhoa o tloaelehileng oa ho lahla moo tšepe e qhibilihisitsoeng e tšeloang ka libopeho tse rarahaneng le ho tiea ka tsela e tobileng.Likaroloana tsena li entsoe ka tse ling tsa metsoako ea tšepe e sa cheleng mocheso ka ho fetisisa lefatšeng, kaha li etselitsoe ho bilika ka lebelo le phahameng likhaseng tse chesang haholo, ho ntša mosebetsi oa ho fehla motlakase lifemeng tsa motlakase le ho fana ka matla bakeng sa lienjine tsa jete.
Ho na le thahasello e ntseng e eketseha ea tlhahiso ea li-blades tsa turbine tse sebelisang khatiso ea 3D, eo, ntle le melemo ea tikoloho le moruo, e lumellang bahlahisi hore ba potlakele ho hlahisa li-blades tse nang le li-geometri tse rarahaneng le tse sebetsang hantle.Empa matsapa a ho hatisa li-turbine tsa 3D ha a so ka a hlola tšitiso e le 'ngoe e kholo: ho khukhuna.
Ka metallurgy, creep e utloisisoa e le tšekamelo ea tšepe ea ho holofala ka mokhoa o ke keng oa fetoloa tlas'a khatello ea kamehla ea mochini le mocheso o phahameng.Ha bafuputsi ba ntse ba hlahloba monyetla oa ho hatisa li-blade tsa turbine, ba ile ba fumana hore mokhoa oa khatiso o hlahisa lijo-thollo tse ntle ho tloha ho tse mashome ho ea ho tse makholo a micrometer-e leng microstructure eo ka ho khetheha e atisang ho qhoma.
"Ha e le hantle, sena se bolela hore turbine ea khase e tla ba le bophelo bo khuts'oane kapa e se be moruo o fokolang," ho boletse Zachary Cordero, moprofesa oa Boeing oa sefofane sa MIT.Tsena ke liphetho tse mpe tse bitsang chelete e ngata.
Cordero le basebetsi-'moho ba fumane mokhoa oa ho ntlafatsa sebopeho sa li-alloys tse hatisitsoeng tsa 3D ka ho eketsa mohato o eketsehileng oa phekolo ea mocheso o fetolang lithollo tse ntle tsa thepa e hatisitsoeng hore e be lijo-thollo tse khōloanyane tsa "columnar" - microstructure e matla e fokotsang bokhoni ba lintho tse bonahalang.lintho tse bonahalang hobane "litšiea" li tsamaisana le axis ea khatello e phahameng ea maikutlo.Mokhoa o hlalositsoeng kajeno ho Additive Manufacturing o bula tsela bakeng sa khatiso ea indasteri ea 3D ea likhaba tsa turbine tsa khase, bafuputsi ba re.
"Haufinyane, re lebelletse hore baetsi ba li-turbine tsa khase ba tla hatisa li-blade tsa bona ka har'a limela tse kholo tsa tlhahiso ea li-additive, ebe ba li lokisa ka mor'a ho li sebelisa ho sebelisa phekolo ea rona ea mocheso," ho boletse Cordero."Ho hatisa ka 3D ho tla thusa meralo e mecha ea ho pholisa e ka eketsang ts'ebetso ea mocheso oa li-turbine, e ba lumellang ho hlahisa matla a lekanang ha ba ntse ba chesa mafura a fokolang 'me qetellong ba ntša carbon dioxide e fokolang."
Boithuto ba Cordero bo ngotsoe ke bangoli ba etelletseng pele Dominic Pichi, Christopher Carter, le Andres Garcia-Jiménez oa Massachusetts Institute of Technology, Anugrahapradha Mukundan le Marie-Agatha Sharpan oa Univesithi ea Illinois e Urbana-Champaign, le Donovan Leonard oa Oak. Ridge National Laboratory.
Mokhoa o mocha oa sehlopha ke mofuta oa recrystallization ea tataiso, kalafo ea mocheso e tsamaisang thepa sebakeng se chesang ka sekhahla se laoloang hantle, ho kopanya lithollo tse ngata tse nyane tsa thepa hore e be likristale tse kholoanyane, tse matla, tse ts'oanang.
Directional recrystallization e qapiloe lilemo tse fetang 80 tse fetileng mme e sebelisoa ho lisebelisoa tse holofalang.Thutong ea bona e ncha, sehlopha sa MIT se sebelisitse recrystallization e lebisitsoeng ho li-superalloys tse hatisitsoeng tsa 3D.
Sehlopha se ile sa leka mokhoa ona ho li-superalloy tse thehiloeng ho nickel tse hatisitsoeng tsa 3D, litšepe tse atisang ho sebelisoa le ho sebelisoa li-turbine tsa khase.Letotong la liteko, bafuputsi ba ile ba beha lisampole tse hatisitsoeng tsa 3D tsa li-superalloy tse kang molamu ka bateng ea metsi a mocheso oa kamore ka tlase ho coil ea induction.Ba ile ba ntša molamu o mong le o mong ka metsing butle-butle ’me ba o fetisa ka khoele ka lebelo le fapaneng, ba futhumatsa melamu haholo mochesong o tlohang ho likhato tse 1200 ho isa ho tse 1245 tsa Celsius.
Ba fumane hore ho hula molamu ka lebelo le itseng (limilimithara tse 2,5 ka hora) le mocheso o itseng (1235 likhato tsa Celsius) ho etsa hore ho be le mocheso o tsitsitseng o etsang hore ho be le phetoho ea microstructure e ntle ea mecha ea phatlalatso.
"Lisebelisoa li qala e le likaroloana tse nyane tse nang le likoli tse bitsoang dislocations, joalo ka spaghetti e robehileng," Cordero o hlalositse."Ha u futhumatsa thepa, likoli tsena lia nyamela 'me li tsosolosoa,' me lijo-thollo li ka hōla.lijo-thollo ka ho monya lintho tse senyehileng le lithollo tse nyenyane—e leng mokhoa o bitsoang recrystallization.”
Ka mor'a ho pholisa lithupa tse nang le mocheso, bafuputsi ba ile ba hlahloba microstructure ea bona ba sebelisa li-microscopes tsa optical le electron 'me ba fumana hore lithollo tse nyenyane tse hatisitsoeng tsa thepa li ile tsa nkeloa sebaka ke lijo-thollo tsa "columnar", kapa libaka tse telele tse kang kristale tse neng li le kholoanyane ho feta tsa pele. lijo-thollo..
"Re hlophisitse bocha ka botlalo," ho boletse sengoli se etelletseng pele Dominic Peach."Re bonts'a hore re ka eketsa boholo ba lijo-thollo ka liodara tse 'maloa tsa boholo ho etsa palo e kholo ea lijo-thollo, tse lokelang ho lebisa ntlafatsong e kholo ea thepa ea creep."
Sehlopha se ile sa boela sa bontša hore se ka laola sekhahla sa ho hula le mocheso oa lisampole tsa molamu ho lokisa lijo-thollo tse ntseng li hōla tsa thepa, ho theha libaka tsa boholo bo itseng ba lijo-thollo le mokhoa.Boemo bona ba taolo bo ka lumella bahlahisi ho hatisa li-blade tsa turbine tse nang le li-microstructures tse khethehileng tsa sebaka tse ka etsoang ho latela maemo a itseng a ts'ebetso, Cordero o re.
Cordero e rera ho leka kalafo ea mocheso ea likarolo tse hatisitsoeng tsa 3D haufi le mahare a turbine.Sehlopha se boetse se sheba mekhoa ea ho potlakisa matla a ho tsitsa hammoho le ho leka ho hanyetsa ha meaho e hloekisitsoeng mochesong.Joale ba hakanya hore kalafo ea mocheso e ka nolofalletsa ts'ebeliso e sebetsang ea khatiso ea 3D ho hlahisa li-blade tsa turbine tsa boemo ba indasteri tse nang le libopeho le lipaterone tse rarahaneng.
Cordero o itse: "Li-blade tse ncha le li-blade geometry li tla etsa hore li-turbine tsa khase tse thehiloeng fatše, 'me qetellong, lienjine tsa lifofane li be le matla a eketsehileng."Ho ea ka pono ea mantlha, sena se ka fokotsa tlhahiso ea CO2 ka ho ntlafatsa katleho ea lisebelisoa tsena."
Nako ea poso: Nov-15-2022
