Ofufuzawo adafufuza mwadongosolo zotsatira za kaphatikizidwe ka aloyi pakusindikiza ndi kulimba kwa ma microstructures, kuti amvetsetse momwe ma aloyi amapangidwira, kusinthika kwamachitidwe, ndi ma thermodynamics amakhudzira magawo opangidwanso. Kupyolera mu zoyesera zosindikizira za 3D, adatanthauzira ma chemistries a alloy ndi magawo omwe amafunikira kukhathamiritsa katundu wa alloy ndikusindikiza apamwamba, ofanana pa microscale. Pogwiritsa ntchito kuphunzira pamakina, adapanga chilinganizo chomwe chingagwiritsidwe ntchito ndi mtundu uliwonse wa aloyi kuti ateteze kusagwirizana.
Njira yatsopano yopangidwa ndi ofufuza aku Texas A&M imakoketsa zida za alloy ndikuwongolera magawo kuti apange zida zapamwamba zosindikizidwa za 3D. Kuwonetsedwa apa ndi ma electron micrograph amitundu ya faifi ya faifi yomwe imagwiritsidwa ntchito pophunzira. Mwachilolezo cha Raiyan Seede.
Njira yatsopano yopangidwa ndi ofufuza aku Texas A&M imakoketsa zida za alloy ndikuwongolera magawo kuti apange zida zapamwamba zosindikizidwa za 3D. Kuwonetsedwa apa ndi ma electron micrograph amitundu ya faifi ya faifi yomwe imagwiritsidwa ntchito pophunzira. Mwachilolezo cha Raiyan Seede.

Mafuta achitsulo omwe amagwiritsidwa ntchito popanga zowonjezera amatha kukhala ndi zitsulo zosakanikirana, monga faifi tambala, aluminiyamu, ndi magnesium, mosiyanasiyana. Panthawi yosindikiza ya laser bed powder 3D, ma ufawa amazizira mofulumira akatenthedwa ndi mtengo wa laser. Zitsulo zosiyanasiyana mu ufa wa alloy zimakhala ndi zoziziritsa zosiyanasiyana ndipo zimalimba pamitengo yosiyana. Kusagwirizana kumeneku kungapangitse zolakwika zazing'ono, kapena microsegregation.

"Ufa wa alloy ukazizira, zitsulo zimatha kutuluka," adatero wofufuza Raiyan Seede. “Tangoganizani kuthira mchere m’madzi. Amasungunuka nthawi yomweyo mchere ukakhala wochepa, koma mukathira mchere wambiri, tinthu tambiri ta mchere tomwe sitisungunuka timayamba kutuluka ngati makhiristo. M’chenicheni, n’zimene zimachitika m’zitsulo zathu zikazizira msanga tikamaliza kusindikiza.” Seede adati vutoli likuwoneka ngati matumba ang'onoang'ono okhala ndi zitsulo zosiyana pang'ono ndi zomwe zimapezeka m'madera ena a gawo losindikizidwa.

Ofufuzawo adafufuza za kulimba kwa ma aloyi anayi a nickel-based alloys. Poyesera, adaphunzira gawo la thupi la aloyi iliyonse pa kutentha kosiyana komanso pakuwonjezeka kwachitsulo china mu alloy yochokera ku faifi tambala. Pogwiritsa ntchito zojambula zatsatanetsatane, ofufuzawo adatsimikiza zamtundu wa aloyi iliyonse yomwe ingayambitse kugawanika kochepa kwambiri panthawi yopanga zowonjezera.

Kenako, ofufuzawo anasungunula njira imodzi ya ufa wachitsulo wa aloyi pamakonzedwe osiyanasiyana a laser ndipo adatsimikiza njira zophatikizira za laser powder zomwe zingapereke magawo opanda porosity.
Chithunzi chojambulira maikulosikopu cha ma elekitironi cha sikeno imodzi ya laser yodutsa gawo limodzi la faifi tambala ndi aloyi ya zinki. Apa, magawo akuda, okhala ndi faifi tambala amalumikizana magawo opepuka okhala ndi mawonekedwe ofanana. Pore ​​amathanso kuwonedwa mumpangidwe wa dziwe losungunuka. Mwachilolezo cha Raiyan Seede.
Chithunzi chojambulira maikulosikopu cha ma elekitironi cha sikeno imodzi ya laser yodutsa gawo limodzi la faifi tambala ndi aloyi ya zinki. Magawo amdima, okhala ndi faifi tambala amalumikizana ndi magawo opepuka okhala ndi mawonekedwe ofanana. Pore ​​amathanso kuwonedwa mumpangidwe wa dziwe losungunuka. Mwachilolezo cha Raiyan Seede.

Zomwe zinapezedwa pazithunzi za gawoli, kuphatikizapo zotsatira za kuyesa kwa njanji imodzi, zinapatsa gululo kusanthula kwatsatanetsatane kwa makonzedwe a laser ndi nyimbo za nickel-based alloy zomwe zingapereke gawo losindikizidwa lopanda porosity popanda microsegregation.

Ofufuzawo adaphunzitsanso zitsanzo zamakina ophunzirira makina kuti azindikire mawonekedwe mu data yoyesera yamtundu umodzi ndi zithunzi za gawo, kuti apange equation ya microsegregation yomwe ingagwiritsidwe ntchito ndi aloyi iliyonse. Seede adati equation idapangidwa kuti iwonetsere kuchuluka kwa tsankho chifukwa cha kulimba kwa aloyi ndi zinthu zakuthupi komanso mphamvu ndi liwiro la laser.

"Timadziwira mozama ndikukonza bwino kagawo kakang'ono ka aloyi kuti pakhale kuwongolera kwambiri zinthu za chinthu chomaliza chosindikizidwa pamlingo wabwino kwambiri kuposa kale," adatero Seede.

Pamene kugwiritsidwa ntchito kwa ma alloys mu AM kukuchulukirachulukira, momwemonso zovuta zosindikizira zomwe zimakwaniritsa kapena kupitilira miyezo yapamwamba yopangira. Kafukufuku waku Texas A&M athandiza opanga kukhathamiritsa chemistry ya alloy ndikuwongolera magawo kuti ma alloys apangidwe makamaka kuti apange zowonjezera komanso opanga athe kuwongolera ma microstructures kwanuko.

"Njira zathu zimathandizira kugwiritsa ntchito bwino ma aloyi amitundu yosiyanasiyana popanga zowonjezera popanda nkhawa zoyambitsa zolakwika, ngakhale zazing'ono," adatero pulofesa Ibrahim Karaman. "Ntchitoyi ithandiza kwambiri makampani opanga ndege, magalimoto, ndi chitetezo omwe nthawi zonse amayang'ana njira zabwino zopangira zida zachitsulo."

Pulofesa Raymundo Arroyavé ndi pulofesa Alaa Elwany, yemwe adagwirizana ndi a Seede ndi Karaman pa kafukufukuyu, adati njirayo imatha kusinthidwa mosavuta ndi mafakitale kuti apange magawo olimba, opanda chilema ndi ma alloy awo omwe angasankhe.