Vatsvakurudzi vakanyatsoongorora mhedzisiro yekuumbwa kwealloy pakudhinda uye kusimba kwemamicrostructures, kuti vanzwisise zviri nani kuti alloy kuumbwa, maitiro akasiyana, uye thermodynamics zvakakanganisa sei zvinowedzera kugadzirwa. Kuburikidza ne3D-yekudhinda kuyedza, ivo vakatsanangura iyo alloy chemistries uye magadzirirwo maparamita anodiwa kukwirisa alloy zvivakwa uye kudhinda yepamusoro, yakafanana zvikamu pamicroscale. Vachishandisa kudzidza kwemichina, vakagadzira fomula inogona kushandiswa nechero mhando yealloy kubatsira kudzivirira nonuniformity.
Nzira nyowani yakagadziridzwa neTexas A&M vaongorori inokwidziridza alloy zvivakwa uye maitiro maparamendi kuti agadzire epamusoro 3D-akadhindwa simbi zvikamu. Inoratidzwa pano iine mavara eelectron micrograph ye nickel powder alloy yakashandiswa muchidzidzo. Nekuda kwaRaiyan Seede.
Nzira nyowani yakagadziridzwa neTexas A&M vaongorori inokwidziridza alloy zvivakwa uye maitiro maparamendi kuti agadzire epamusoro 3D-akadhindwa simbi zvikamu. Inoratidzwa pano iine mavara eelectron micrograph ye nickel powder alloy yakashandiswa muchidzidzo. Nekuda kwaRaiyan Seede.

Alloy simbi poda inoshandiswa mukuwedzera kugadzira inogona kuve nemusanganiswa wesimbi, senge nickel, aruminiyamu, uye magnesium, munzvimbo dzakasiyana. Munguva yelaser bed poda fusion 3D kudhinda, idzi poda dzinotonhora nekukurumidza mushure mekunge dzadziiswa nelaser beam. Iyo simbi dzakasiyana-siyana mu alloy poda dzine zvakasiyana-siyana zvekutonhodza zvivakwa uye kusimba pamitengo yakasiyana. Kusaenderana uku kunogona kugadzira zvikanganiso zvidiki, kana microsegregation.

"Kana iyo alloy poda inotonhora, simbi yega inogona kubuda," muongorori Raiyan Seede akadaro. “Fungidzira uchidira munyu mumvura. Inonyungudika pakarepo kana huwandu hwemunyu hushoma, asi paunodira munyu wakawanda, zvidimbu zvemunyu zvakawandisa zvisinganyunguduke zvinotanga kubuda semakristasi. Kutaura zvazviri, ndizvo zviri kuitika mumarata edu apo anotonhora nokukurumidza pashure pokudhinda.” Seede akati chikanganiso ichi chinoratidzika kunge tumahomwe tune chidimbu chakasiyana chemidziyo yesimbi pane inowanikwa mune dzimwe nzvimbo dzechikamu chakadhindwa.

Vatsvagiri vakaongorora kuomeswa kwema microstructures mana binary nickel-based alloys. Mukuedza, vakadzidza chikamu chemuviri chealloy yega yega pane tembiricha dzakasiyana uye pakuwedzera kudzika kweimwe simbi mune nickel-based alloy. Vachishandisa akadzama echikamu dhayagiramu, vaongorori vakasarudza kuumbwa kwemakemikari ega yega alloy iyo yaizokonzera kushoma microsegregation panguva yekuwedzera yekugadzira.

Tevere, vaongorori vakanyungudusa track imwe chete yealloy simbi poda pane akasiyana laser marongero uye akafunga iyo laser poda mubhedha fusion process paramita yaizounza porosity-isina zvikamu.
Mufananidzo wekuvheneka maikorosikopu erekitironi yeimwe laser scan cross-section yenickel uye zinc alloy. Pano, rima, rizere-nickel nhanho dzinopindirana nhanho dzakareruka neunifomu microstructure. Iyo pore inogona zvakare kucherechedzwa mune melt pool chimiro. Nekuda kwaRaiyan Seede.
Mufananidzo wekuvheneka maikorosikopu erekitironi yeimwe laser scan cross-section yenickel uye zinc alloy. Yakasviba, nickel-rich phases inopindirana malighter phases ane uniform microstructure. Iyo pore inogona zvakare kucherechedzwa mune melt pool chimiro. Nekuda kwaRaiyan Seede.

Ruzivo rwakawanikwa kubva muchikamu chedhiyagiramu, rwakasanganiswa nemhedzisiro kubva kune imwe-track kuyedza, yakapa timu ongororo yakazara yemasetirwo elaser uye nickel-based alloy nziyo dzinogona kuburitsa porosity-isina yakadhindwa chikamu pasina microsegregation.

Vatsvagiri vanotevera vakadzidzisa michina-yekudzidza modhi kuti vaone mapatani mune imwechete-track yekuyedza data uye chikamu dhayagiramu, kugadzira equation yemicrosegregation inogona kushandiswa nechero alloy. Seede akati iyo equation yakagadzirirwa kufanotaura huwandu hwekupatsanurwa kwakapihwa iyo alloy's solidified renji uye zvinhu zvemukati uye simba re laser nekumhanya.

"Tinotora zvakadzika mukugadzirisa zvakanaka microstructure yealloys kuitira kuti pave nekutonga kwakawanda pamusoro pezvinhu zvechinhu chekupedzisira chakadhindwa pamwero wakatsetseka kupfuura kare," akadaro Seede.

Sezvo kushandiswa kwealloys muAM kuchiwedzera, ndizvo zvichaitawo matambudziko ekudhinda zvikamu zvinosangana kana kudarika zvigadzirwa zvemhando yepamusoro. Chidzidzo cheTexas A&M chichaita kuti vagadziri vagone kukwirisa alloy chemistry uye maitiro ekugadzirisa kuitira kuti alloys agone kugadzirwa zvakanangana nekuwedzera kugadzira uye vagadziri vanokwanisa kudzora microstructures munharaunda.

"Maitiro edu anorerutsa kushandiswa kwakabudirira kwemaaloyi emhando dzakasiyana dzekugadzira yekuwedzera pasina kunetsekana nekuunza hurema, kunyangwe padiki," purofesa Ibrahim Karaman akadaro. "Basa iri richabatsira zvikuru maindasitiri emuchadenga, emotokari, uye ekudzivirira anogara achitsvaga nzira dziri nani dzekuvaka simbi dzetsika."

Muzvinafundo Raymundo Arroyavé uye purofesa Alaa Elwany, akabatana naSeede naKaraman patsvagiridzo iyi, vakati nzira iyi inogona kuchinjika zviri nyore nemaindasitiri kuti vavake akasimba, asina hurema neayo alloy yesarudzo.