Masangano asina purofiti, vezvenhau, uye veruzhinji vanogona kudhawunirodha mifananidzo kubva kuMIT Press Office webhusaiti pasi peCreative Commons Attribution isiri-yekutengesa, isina-inobuda rezinesi.Iwe haufanirwe kushandura iyo yakapihwa mifananidzo, ingoicheka kusvika pakukura kwayo.Zvikwereti zvinofanirwa kushandiswa pakukopa mifananidzo;"MIT" chikwereti chemifananidzo kunze kwekunge yakanyorwa pazasi.
Mutsva wekupisa wekupisa wakagadziridzwa paMIT unoshandura iyo microstructure ye3D yakadhindwa simbi, ichiita kuti zvinhu zvisimbe uye zvirambe zvakanyanya kumamiriro ekupisa.Iyi tekinoroji inogona kugonesa 3D kudhindwa kwepamusoro-kushanda blades uye vanes kune gasi turbines uye jet injini dzinogadzira magetsi, zvichiita kuti madhizaini matsva aderedze kushandiswa kwemafuta uye kushanda nesimba.
Nhasi gasi turbine mablades anogadzirwa pachishandiswa nzira yechinyakare yekukandira umo simbi yakanyungudutswa inodirwa mumhando dzakaoma uye nekusimba kwakananga.Zvinhu izvi zvinogadzirwa kubva kune mamwe masimbi anodzivirira kupisa zvakanyanya pasirese, sezvo akagadzirirwa kutenderera nekumhanya kwakanyanya mumagasi anopisa zvakanyanya, kuburitsa basa rekugadzira magetsi mumagetsi emagetsi uye nekupa simba kune jet injini.
Pane kufarira kuri kukura mukugadzirwa kweturbine blades uchishandisa 3D kudhinda, iyo, kuwedzera kune zvakatipoteredza uye zvehupfumi zvakanakira, inobvumira vanogadzira kukurumidza kugadzira mablades ane zvakanyanya kuoma uye simba-inoshanda geometries.Asi kuedza kudhinda 3D kudhinda turbine blades haisati yakunda chipingamupinyi chimwe chikuru: kukambaira.
MuMetallurgy, creep inonzwisiswa setsika yesimbi yekusachinja isingachinjiki pasi pekugara kwemechanic kusagadzikana uye tembiricha yakanyanya.Kunyange zvazvo vatsvakurudzi vakanga vachitsvaga mukana wekudhinda turbine blades, vakaona kuti kudhinda kunobudisa tsanga dzakanaka kubva kumakumi kusvika kumazana ema micrometer - microstructure inonyanya kutsika.
"Mukuita, izvi zvinoreva kuti turbine yegasi ichava nehupenyu hupfupi kana kuve nehupfumi," akadaro Zachary Cordero, purofesa weBoeing weaerospace kuMIT."Iyi mibairo yakaipa inodhura."
Cordero nevamwe vaanoshanda navo vakawana nzira yekuvandudza chimiro che 3D yakadhindwa alloys nekuwedzera imwe nhanho yekupisa kupisa iyo inoshandura tsanga dzezvakadhindwa kuita tsanga hombe "columnar" - yakasimba microstructure inoderedza kugona kwechinhu chinokambaira.zvinhu nekuti "mbiru" dzinoenderana neaxis yekunyanya kunetseka.Iyo nzira yakatsanangurwa nhasi muAdditive Manufacturing inovhura nzira yeindasitiri 3D kudhindwa kwegasi turbine blades, vaongorori vanodaro.
"Munguva pfupi iri kutevera, tinotarisira vanogadzira gasi turbine kudhinda mablades avo mune yakakura-yakakura yekuwedzera mafekitori ekugadzira vobva vaagadzirisa vachishandisa kupisa kwedu," akadaro Cordero."Kudhinda kwe3D kuchagonesa zvivakwa zvitsva zvinotonhorera zvinogona kuwedzera kudziya kweturbines, zvichivabvumira kugadzira simba rakafanana vachipisa mafuta mashoma uye pakupedzisira vachiburitsa kabhoni dhaikisaidhi shoma."
Chidzidzo cheCordero chakanyorwa pamwe nevanyori vanotungamira Dominic Pichi, Christopher Carter, uye Andres Garcia-Jiménez weMassachusetts Institute of Technology, Anugrahapradha Mukundan naMarie-Agatha Sharpan veYunivhesiti yeIllinois kuUrbana-Champaign, uye Donovan Leonard weOak. Ridge National Laboratory.
Mutoo mutsva wechikwata inzira yekudzokorodza, mushonga wekupisa unofambisa zvinhu kuburikidza nenzvimbo inopisa zvine mwero wakanyatsodzorwa, kusanganisa mhodzi dzakawanda dzechinyorwa kuita makristasi makuru, akasimba, akafanana.
Directional recrystallization yakagadzirwa pamusoro pe80 makore apfuura uye yakashandiswa kune zvinoremara zvinhu.Muchidzidzo chavo chitsva, timu yeMIT yakaisa yakanangidzirwa recrystallization kune 3D yakadhindwa superalloys.
Chikwata chakaedza nzira iyi pa3D yakadhindwa nickel-based superalloys, masimbi anowanzo kukanda uye kushandiswa mumagetsi egasi.Mukutevedzana kwezviedzo, vaongorori vakaisa 3D-yakadhindwa sampuli dzetsvimbo-senge superalloys mukamuri-tembiricha yekugezera mvura yakananga pasi peiyo induction coil.Vakakweva tsvimbo imwe neimwe mumvura zvishoma nezvishoma ndokuipfuudza nekoiri nekumhanya kwakasiyana, vachidziyisa matanda kusvika kumatembiricha ari kubva pa1200 kusvika pa1245 madhigirii.
Vakaona kuti kudhonza tsvimbo pane imwe sipidhi (2.5 millimita paawa) uye pane imwe tembiricha (1235 madhigirii Celsius) kunogadzira tembiricha yakadzika iyo inokonzeresa shanduko mune yakanaka-grained microstructure yeanodhinda media.
"Zvinhu zvinotanga zviri zvidiki zvine hurema hunonzi dislocation, senge spaghetti yakatyoka," akatsanangura Cordero.“Ukapisa zvinhu izvi, zvirema izvi zvinopera zvobva zvavakwa, uye zviyo zvinokura.zviyo nokusveta zvinhu zvakakanganisika uye tsanga duku—muitiro unonzi recrystallization.”
Mushure mekutonhodza matanda anopiswa nekupisa, vatsvakurudzi vakaongorora microstructure yavo vachishandisa optical uye electron microscopes uye vakaona kuti yakadhindwa mikroscopic tsanga dzezvinhu zvakatsiviwa ne “columnar” tsanga, kana kureba, sekristaro matunhu aive akakura kupfuura ekutanga. zviyo..
"Takagadzirisa zvachose," akadaro munyori anotungamira Dominic Peach."Isu tinoratidza kuti isu tinokwanisa kuwedzera saizi yezviyo nemirairo yakati wandei yehukuru kuti tigadzire huwandu hukuru hwezviyo, izvo zvinofanirwa kutungamira mukuvandudzika kwakakosha kwezvinhu zvinokambaira."
Chikwata chakaratidzawo kuti chaigona kudzora chiyero chekudhonza uye tembiricha yetsvimbo sampuli kuti igadzirise-inokura tsanga dzezvinhu, vachigadzira matunhu eiyo saizi yezviyo uye kutaridzika.Iyi nhanho yekutonga inogona kubvumira vagadziri kudhinda turbine blades ine saiti-chaiyo microstructures inogona kugadzirwa kune chaiwo mamiriro ekushanda, Cordero anodaro.
Cordero inoronga kuyedza kurapwa kwekupisa kwezvikamu zvakadhindwa zve 3D padyo nemablades eturbine.Chikwata ichi chiri kutsvagawo nzira dzekumhanyisa simba rekusimba pamwe nekuyedza kutsika kwezvivakwa zvinorapwa nekupisa.Vanobva vafungidzira kuti kurapwa kwekupisa kunogona kugonesa kushandiswa kunoshanda kwe3D kudhinda kugadzira maindasitiri-giredhi turbine mablades ane mamwe maumbirwo akaomarara uye mapatani.
"Mashizha matsva nemablade geometry achaita kuti maturbine egasi akavakirwa pasi uye, pakupedzisira, injini dzendege dzishande nesimba," akadaro Cordero."Kubva pamaonero ekutanga, izvi zvinogona kuderedza kuburitswa kweCO2 nekuvandudza kushanda kwemidziyo iyi."
Nguva yekutumira: Nov-15-2022
