
nikkal aluminaid

nikkal aluminaid saadhaaranayaayi ettavum vyaapakamaayi upayogikkunna rund samyukthangalil onnaaya nii 3 aall allengil niyal ennivaye soochippikkunnu, ennaal nii-aall sisttathil ninnulla mikka aluminaayidukaleyum soochippikkaan kazhiyum. eee aloykal avayude nashana prathirodham, kuranja saandrata, eluppathilulla uthppaadanam enniva kaaranam vyaapakamaayi upayogikkunnu. nikkal adisthaanamaakkiyulla suuppar aloykalil shakthippeduthunna γ 'ghattam athinte urukunna thaapanilayude 0.7-0.8 vare uyarnna thaapanila shakti anuvadikkunnathinaal Ni3al prathyeka thaalpparyamullathaanu. athesamayam, kuranja saandrata (Ni3al-nekkaal kuravu), nalla taapa chalakatha, ooksideshan prathirodham, uyarnna urukal thaapanila thudangiya mikacha gunangal niyal pradarshippikkunnu. eee gunangal gyaas turbineukalileyum jettu enchinukalileyum bledukalile coatingukal polulla prathyeka uyarnna thaapanila prayogangalkku anuyojyamaakkunnu. ennirunnaalum, eee rund aloikalkkum ooshmaavil valare pottunnathinte poraaymayundu, athesamayam uyarnna thapanilayilum Ni3al pottuna avasthayilaanu. ennirunnaalum, polychrystalininu pakaram orotta kristalaayi nirmmikkumbol Ni3al neey dakttail acan kazhiyumennu theliyikkappettittund. 2005ll nikkal aluminayidinte oru maatriksil vajrangal ulcherthu ettavum urachiline prathirodhikkunna metteeriyal srishtichathaayi report cheyyappettappol mattoru aaplikkeshan pradharshippichu.
3.
polychrystaline nii3aall adisthaanamaakkiyulla aloikalkkulla pradhana prashnam athinte muriyile thapanilayum uyarnna thaapanilayile pottalumaan. uyarnna kramatthilulla laattisukalil sthaanabhramsham neengaanulla kazhivillaymayaanu eee pottal saadhaaranayaayi kaaranamaakunnath. eee nii3aall adisthaanamaakkiyulla aloykal upayogikkaan kazhiyunna gadanaaparamaaya prayogangal valareyadhikam kurachathinaal eee pottal pariharikkan gaveshakar kadinamaayi parishramichu. ennirunnaalum, 1990-ll, cheria alavil boron avatharippikkunnath intergraanulaar odivukal adichamarthunnathiloode ductility ganyamaayi vardhippikkumennu kaanichu. ithu abhisambodhana cheythukazhinjaal, aloy gadanayude gunangal paramavadhi vardhippikkunnathilke shradha thirikkunnu. soochippichathupole, niyal 3 adisthaanamaakkiyulla aloykal avayude shakti labhikkunnath γ-ll γ 'avakshepangalude roopeekaranathil ninnaan, ithu avakshepathe shakthippeduthunnathiloodu aloykale shakthippeduthunnu. niyal3 adisthaanamaakkiyulla eee aloykalil γ 'avakshepangalude vooliyam bhinnasankhya 80 sathamaanam vare uyarnnathaan. eee uyarnna vooliyam bhinnasankhya kaaranam eee aloykalude jeevithachakrangalil eee γ 'avakshepangalude parinamam valia thaalpparyamulla oru mekhalayaanu. uyarnna thapanilayil (800 digri selshyas muthal 1000 digri selshyas vare) eee γ 'avakshepangalude parukkan roopeekaranam eee aloykalude shakti valareyadhikam kuraykkunnu ennathaanu pradhana aashankakalilonnu. γ + γ 'ghattatthile interfasial, ilaastik oorjjam thammilulla santhulithaavasthayaanu eee parukkan avasthaykku kaaranam, ithu deerghakaalathekku saadhaaranayaayi anivaaryamaan. nilavile gaveshanam mattu gadakangal avatharippichu eee parukkan prashnam pariharikkan sramichittundu. 1000 manikkoor 1000 digri selshyasil niyal 3 adisthaanamaakkiyulla aloikalkku creep prathirodham ganyamaayi vardhippikkaan kazhiyunna savisheshamaaya multiface konfigareshanukal srishtikkaan phee, cr, moow thudangiya gadakangal theliyichittundu. eee creep prathirodham asamamaya avakshepam cr4.6moni2.1 roopappedunnathinu kaaranamaakunnu, ithu sthaanachalanangal pinn cheyyukayum γ 'ghattatthinte kooduthal parukkan avastha thadayukayum cheiyunnu. phee, sii. aarr ennivayude eee kootticherkkal niyal 3 adisthaanamaakkiyulla aloy veldability ganyamaayi vardhippikkunnu, ithu eluppavum chelavu kuranjathumaaya uthppaadanam undaayirunnittum vyaavasaayika upayogathinu ippozhum oru pradhana prashnam uyarthunnu. pothuve, nii-adhishtitha aloykalil mikacha shakthippeduthunna avakshepamaayi nii3aall pravartthikkunnu, ithu eee vasthukkale uyarnna thaapanila, looad bairing aaplikkeshanukalkku anuyojyamaakkunnu. mattu gadakangal samyojippichukondu eee vasthuvinte poraaymakal pariharikkunnathinayi kooduthal gaveshanam nadakkunnundu.
niyal.
gunakaramaya gunangal undaayirunnittum niyalinu saadhaaranayaayi rund gadakangalunda kuranja thapanilayil (<330 ° selshyas) valare uyarnna pottal, 550 ° selshyasil kooduthal thapanilayil vegathil shakti nashtappedal. aanti-phase athirthikalude uyarnna oorjjavum dhaanya athirthikalile uyarnna aattomik oordarum pottalundaakkunnu. Ni3al adisthaanamaakkiyulla aloikalkku samaanamaayi eee prasnangal saadhaaranayaayi mattu gadakangalude samyojanathiloodeyaanu abhisambodhana cheiyunnathu. sookshumaghadanayude swaadheenathe aashrayich shramicha gadakangale moonnu grouppukalaayi tirikkaam
kooduthal vijayakaramaya chila gadakangal effe, qoo, cr ennivayaanennu theliyikkappettittund, ithu muriyile thaapanilayude mridulathayum choodulla pravarthanakshamathayum ganyamaayi vardhippikkunnu. β ghatta daanyangale parishkkarikkunna γ ghattatthinte roopeekaranamaanu eee vardhanavinu kaaranam. phee, gaa, moow ennivayumaayi samyojippikkunnath muriyile thaapanilayude draavakathayum ganyamaayi mechappeduthumennu theliyikkappettittund. aduthide, sii. aarr, dablyu, emm. oo thudangiya refracturing lohangal chertthathu muriyile thaapanilayile draavakatha vardhippikkuka mathramalla, uyarnna thapanilayil shakthiyum odivukalude kaadinyavum vardhippikkukayum cheiyunnu. soolid layani kaadinyathinu kaaranamakunna utectic aloy ni45.5al9mo, α-sii. aarr. inclusions thudangiya savisheshamaaya microstructureukalude roopeekaranamaanu ithinu kaaranam. eee sankeernamaaya aloikalkku (Ni42al51cr3mo4) selective lazer nirmmaanam polulla additteev nirmmaana prakriyakaliloode kettichamaykkaan kazhiyumennu kaanikkunnu, ithu eee aloikalkkulla saadhyathayulla prayogangal valareyadhikam vardhippikkunnu.
aisi-221emm.
chromium, molybdinum, syrconium, boron ennivayulppede niravadhi lohangalumaayi chernnu nikkal aluminaid chernnathaanu aii. sii-221emm ennariyappedunna nii3aall. boron cherkkunnath dhaanya athirthi rasathanthrathil kriyathmakamaaya maattam varuthukayum dhaanya parishkkaranam prolsaahippikkukayum cheythukondu aloy draavakatha vardhippikkunnu. eee metteeriyalinte haal-pechu paaraamettarukal σo = 163 mPA umm ky = 8.2 mPAucm1/2 umm aayirunnu. boron samanamaaya oru samvidaanathiloode bulk Ni3al-nte kaadinyam vardhippikkunnu.
eee aloy athinte bhaarathinu valare shakthamaan, saadhaarana ezz. eiii. iii 304 stainless steelinekkaal anchiratti shakthamaan. mikka aloykalil ninnum vyathyasthamayi, aii. sii-221emm. muriyile thapanilayil ninnu 800 digri selshyas vare shakti vardhippikkunnu.
eee aloy choodu, naashanashtangal ennivaye valare prathirodhikkunnu, koodaathe choodu-treating choolakalilum mattu aaplikkeshanukalilum upayogikkunnu, avide athinte deerghaayussum kuranja naashanashtavum stainless steelinekkaal oru nettam nalkunnu. eee aloiyude microstructuril Ni5zr utectic ghattam ulppedunnuvennu kandethiyittundu, athinaal pottalukalillathe choodulla jolic layani chikitsa falapradamaanu.

