Ƙungiyoyi masu zaman kansu, kafofin watsa labaru, da jama'a na iya sauke hotuna daga gidan yanar gizon MIT Press Office a ƙarƙashin Ƙarƙashin Ƙirƙirar Ƙirƙirar Kasuwanci, lasisi mara izini.Kada ku canza hotunan da aka bayar, kawai yanke su zuwa girman daidai.Dole ne a yi amfani da ƙididdiga yayin yin kwafin hotuna;"MIT" daraja don hotuna sai dai idan an lura a ƙasa.
Wani sabon maganin zafi da aka haɓaka a MIT yana canza ƙirar ƙirar ƙarfe na 3D da aka buga, yana sa kayan ya fi ƙarfi kuma ya fi juriya ga matsanancin yanayin zafi.Wannan fasaha za ta iya ba da damar buga 3D na manyan igiyoyi da vanes don injin turbin gas da injunan jet da ke samar da wutar lantarki, yana ba da damar sabbin ƙira don rage yawan amfani da mai da ƙarfin kuzari.
Ana yin injin injin injin gas na yau ta hanyar yin amfani da tsarin simintin gargajiya na gargajiya inda ake zuba narkakken ƙarfe a cikin sifofi masu sarƙaƙƙiya tare da ƙarfafawa.An kera wadannan abubuwa ne daga wasu nau’o’in karfen da suka fi iya jure zafi a doron kasa, domin an kera su ne da sauri a cikin iskar gas mai tsananin zafi, da fitar da aikin samar da wutar lantarki a masana’antar samar da wutar lantarki da kuma samar da kuzari ga injinan jet.
Ana samun karuwar sha'awar samar da injin turbine ta amfani da bugu na 3D, wanda, baya ga fa'idodin muhalli da tattalin arziki, yana ba masana'antun damar samar da ruwan wukake da sauri tare da ƙarin hadaddun geometric da kuzari.Amma ƙoƙarin 3D bugu na injin turbine har yanzu bai shawo kan babbar matsala ɗaya ba: creep.
A cikin ƙarfe na ƙarfe, ana fahimtar creep a matsayin yanayin ƙarfe don lalacewa ta hanyar da ba za a iya jujjuya shi ba ƙarƙashin matsi na injina akai-akai da yawan zafin jiki.Yayin da masu binciken ke binciko yuwuwar buguwar injin turbine, sun gano cewa tsarin bugu yana samar da kyawawan hatsi masu girma daga dubun zuwa ɗaruruwan micrometers-wani ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun abubuwa.
Zachary Cordero, farfesa a sararin samaniyar Boeing a MIT ya ce "A aikace, wannan yana nufin cewa injin turbin gas zai sami ɗan gajeren rayuwa ko kuma ya kasance ƙasa da tattalin arziki.""Wadannan sakamako mara kyau ne masu tsada."
Cordero da abokan aiki sun sami wata hanya don inganta tsarin 3D da aka buga ta hanyar ƙara ƙarin matakan maganin zafi wanda ke juya kyawawan hatsi na kayan da aka buga zuwa manyan hatsi na "columnar" - ƙananan ƙananan ƙwayoyin cuta wanda ke rage girman yiwuwar kayan.abu saboda "ginshiƙai" suna daidaitawa tare da axis na matsakaicin matsakaici.Hanyar da aka zayyana a yau a cikin Ƙarfafa Manufacturing na samar da hanya ga masana'antu 3D bugu na gas turbine ruwan wukake, masu bincike sun ce.
"A nan gaba kadan, muna sa ran masana'antun injin turbin gas za su buga ruwan wukake a cikin manyan masana'antun masana'antu sannan su aiwatar da su ta hanyar amfani da maganin zafi," in ji Cordero."Bugu na 3D zai ba da damar sabbin gine-ginen sanyaya da za su iya haɓaka ingancin wutar lantarki na turbines, ba su damar samar da adadin kuzari iri ɗaya yayin kona ƙarancin mai kuma a ƙarshe suna fitar da ƙarancin carbon dioxide."
Manyan marubuta Dominic Pichi, Christopher Carter, da Andres Garcia-Jiménez na Cibiyar Fasaha ta Massachusetts, Anugrahapradha Mukundan da Marie-Agatha Sharpan na Jami'ar Illinois a Urbana-Champaign, da Donovan Leonard na Oak ne suka rubuta binciken Cordero. Ridge National Laboratory.
Sabuwar hanyar ƙungiyar wani nau'i ne na recrystallization na jagora, magani mai zafi wanda ke motsa abu ta cikin yanki mai zafi a daidai adadin da ake sarrafawa, yana haɗa nau'ikan ƙwayoyin microscopic da yawa na kayan zuwa girma, ƙarfi, ƙarin lu'ulu'u iri ɗaya.
An ƙirƙiri recrystallization na kai tsaye sama da shekaru 80 da suka gabata kuma an yi amfani da su ga kayan da ba su da lahani.A cikin sabon binciken nasu, ƙungiyar MIT ta yi amfani da recrystallization da aka ba da umarni zuwa 3D bugu superalloys.
Ƙungiyar ta gwada wannan hanyar akan 3D bugu na tushen nickel superalloys, karafa da aka fi jefa kuma ana amfani da su a injin injin gas.A cikin jerin gwaje-gwajen, masu binciken sun sanya samfuran 3D-bugu na sanduna-kamar superalloys a cikin wankan ruwa mai zafin daki kai tsaye a ƙasan nada induction.A hankali suka ciro kowace sanda daga cikin ruwan sannan suka wuce ta cikin nada da gudu daban-daban, suna dumama sandunan sosai zuwa yanayin zafi daga 1200 zuwa 1245 digiri Celsius.
Sun gano cewa jawo sandar a wani ɗan gudun hijira (milimita 2.5 a cikin awa ɗaya) kuma a wani yanayin zafi (digiri 1235) yana haifar da ƙarancin zafin jiki wanda ke haifar da sauye-sauye a cikin ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun kayan aikin bugun rubutu.
"Kayan yana farawa ne a matsayin ƙananan ƙwayoyin cuta tare da lahani da ake kira dislocations, kamar spaghetti da aka karye," in ji Cordero."Lokacin da kuka ɗora kayan, waɗannan lahani suna ɓacewa kuma suna sake ginawa, kuma hatsi na iya girma.hatsi ta hanyar shan abubuwan da ba su da lahani da ƙananan hatsi—tsari da ake kira recrystallization.”
Bayan sanyaya sandunan da aka yi amfani da zafi, masu binciken sun yi nazarin tsarin su ta hanyar amfani da na'urorin gani da na lantarki kuma sun gano cewa an maye gurbin kwayoyin halitta da aka buga da nau'in "columnar", ko kuma tsayi, yankuna masu kama da crystal waɗanda suka fi girma fiye da na asali. hatsi..
"Mun sake fasalin gaba daya," in ji marubucin marubuci Dominic Peach."Muna nuna cewa za mu iya ƙara girman hatsi ta hanyar umarni da yawa don samar da adadi mai yawa na hatsin ginshiƙan, wanda ya kamata a ka'ida ya haifar da gagarumin ci gaba a cikin kaddarorin masu rarrafe."
Har ila yau, ƙungiyar ta nuna cewa za su iya sarrafa nauyin cirewa da zafin jiki na samfurorin sanda don daidaita nau'o'in hatsi masu girma na kayan, samar da yankuna na ƙayyadaddun hatsi da kuma daidaitawa.Wannan matakin sarrafawa na iya baiwa masana'antun damar buga ruwan injin turbine tare da ƙayyadaddun ƙayyadaddun ƙayyadaddun bayanai waɗanda za a iya keɓance su da takamaiman yanayin aiki, in ji Cordero.
Cordero yana shirin gwada zafin zafin ɓangarorin 3D da aka buga kusa da injin turbine.Har ila yau, ƙungiyar tana duba hanyoyin da za a iya ƙara ƙarfin ƙarfi tare da gwada juriyar yanayin zafi.Daga nan sai suka yi hasashen cewa maganin zafi zai iya ba da damar aiwatar da aikace-aikacen bugu na 3D don samar da injin injin injin injin masana'antu tare da ƙarin sifofi da ƙira.
Cordero ya ce "Sabbin ruwan wukake da na'ura mai kwakwalwa za su sa injinan iskar gas na kasa da kuma, a karshe, injunan jiragen sama su kara kuzari," in ji Cordero."Daga hangen nesa, wannan na iya rage hayakin CO2 ta hanyar inganta ingancin waɗannan na'urori."
Lokacin aikawa: Nuwamba-15-2022
