Ua noiʻi ka poʻe noiʻi i nā hopena o ka haku mele ma ka paʻi ʻana a me ka paʻa ʻana o nā microstructures, e hoʻomaopopo maikaʻi i ke ʻano o ka hui ʻana o ka alloy, ka hoʻololi ʻana, a me ka thermodynamics i pili i nā ʻāpana i hana ʻia. Ma o nā hoʻokolohua paʻi 3D, ua wehewehe lākou i nā kemika alloy a me nā ʻāpana kaʻina e pono ai ke koho pono i nā waiwai alloy a paʻi i nā ʻāpana like ʻole ma ka microscale. Me ka hoʻohana ʻana i ka mīkini, hana lākou i kahi ʻano e hiki ke hoʻohana ʻia me kēlā me kēia ʻano alloy e kōkua i ka pale ʻana i ka nonuniformity.
ʻO kahi ala hou i hoʻomohala ʻia e nā mea noiʻi ʻo Texas A&M e hoʻopaʻa pono i nā waiwai alloy a me nā ʻāpana hana e hana i nā ʻāpana metala paʻi 3D maikaʻi loa. Hōʻike ʻia ma ʻaneʻi kahi micrograph electron colored o kahi huila nickel powder i hoʻohana ʻia ma ke aʻo ʻana. Na Raiyan Seede.
ʻO kahi ala hou i hoʻomohala ʻia e nā mea noiʻi ʻo Texas A&M e hoʻopaʻa pono i nā waiwai alloy a me nā ʻāpana hana e hana i nā ʻāpana metala paʻi 3D maikaʻi loa. Hōʻike ʻia ma ʻaneʻi kahi micrograph electron colored o kahi huila nickel powder i hoʻohana ʻia ma ke aʻo ʻana. Na Raiyan Seede.

Hiki i nā pauka metala huila i hoʻohana ʻia no ka hana hoʻohui ʻana i nā metala, e like me nickel, aluminika, a me ka magnesium, ma nā ʻano ʻokoʻa like ʻole. I ka wā o ka paʻi ʻana i ka paʻi 3D bed powder fusion, ʻoluʻolu koke kēia mau pauka ma hope o ka hoʻomehana ʻia ʻana e kahi kukuna laser. ʻO nā metala ʻokoʻa i loko o ka pauka alloy he ʻokoʻa nā ʻano hoʻomaha a paʻa i nā uku like ʻole. Hiki i kēia ʻokoʻa ke hana i nā hemahema microscopic, a i ʻole microsegregation.

"I ka wā e maʻalili ai ka pauka alloy, hiki i nā metala ke hoʻokahe i waho," wahi a ka mea noiʻi ʻo Raiyan Seede. “E noʻonoʻo i ka ninini ʻana i ka paʻakai i ka wai. Hoʻoheheʻe koke ia i ka wā liʻiliʻi ka nui o ka paʻakai, akā i kou ninini ʻana i ka paʻakai hou aʻe, hoʻomaka nā ʻāpana paʻakai i hoʻoheheʻe ʻole ʻia e like me nā kristal. ʻO ka mea nui, ʻo ia ka mea e hana nei i loko o kā mākou mau mea metala ke maʻalili koke lākou ma hope o ka paʻi ʻana. Ua ʻōlelo ʻo Seede, ʻike ʻia kēia hemahema ma ke ʻano he ʻeke liʻiliʻi i loaʻa kahi ʻano ʻokoʻa iki o nā mea metala ma mua o nā mea i loaʻa ma nā wahi ʻē aʻe o ka ʻāpana i paʻi ʻia.

Ua noiʻi nā mea noiʻi i nā microstructures solidification o ʻehā binary nickel-based alloys. I loko o nā hoʻokolohua, ua aʻo lākou i ka pae kino no kēlā me kēia huila i nā mahana like ʻole a me ka hoʻonui ʻana i ka ʻike o nā metala ʻē aʻe i loko o ka nickel-based alloy. Me ka hoʻohana ʻana i nā kiʻi kikoʻī kikoʻī, ua hoʻoholo nā mea noiʻi i ke ʻano kemika o kēlā me kēia alloy e hoʻemi iki i ka microsegregation i ka wā hana hoʻohui.

Ma hope aʻe, hoʻoheheʻe ka poʻe noiʻi i hoʻokahi mele o ka pauka metala ma nā hoʻonohonoho laser ʻē aʻe a hoʻoholo i nā ʻāpana kaʻina kaʻina hoʻohui ʻana i ka pauka laser e hāʻawi i nā ʻāpana porosity-free.
He kiʻi microscope electron scanning o kahi ʻāpana keʻa hoʻokahi laser scan o kahi nickel a me ka zinc alloy. Ma ʻaneʻi, hoʻopili nā ʻāpana ʻeleʻele me ka nickel i nā ʻāpana māmā me ka microstructure like ʻole. Hiki ke ʻike ʻia kahi pore i loko o ka hoʻoheheʻe wai hoʻoheheʻe. Na Raiyan Seede.
He kiʻi microscope electron scanning o kahi ʻāpana keʻa hoʻokahi laser scan o kahi nickel a me ka zinc alloy. ʻO nā ʻāpana pōʻeleʻele, waiwai nui ka nikela e hoʻopili i nā ʻāpana māmā me ka microstructure like ʻole. Hiki ke ʻike ʻia kahi pore i loko o ka hoʻoheheʻe wai hoʻoheheʻe. Na Raiyan Seede.

ʻO ka ʻike i loaʻa mai nā kiʻikuhi pae, i hui pū ʻia me nā hopena mai nā hoʻokolohua hoʻokahi-track, ua hāʻawi i ka hui i kahi loiloi piha o nā hoʻonohonoho laser a me nā haku mele nickel-based i hiki ke hoʻohua i kahi ʻāpana paʻi porosity-free me ka microsegregation.

Ua hoʻomaʻamaʻa ka poʻe noiʻi i nā hiʻohiʻona aʻo mīkini e ʻike i nā mamana i ka ʻikepili hoʻokolohua hoʻokahi-alanui a me nā kiʻi ʻāpana, e hoʻomohala i kahi hoʻohālikelike no ka microsegregation hiki ke hoʻohana ʻia me kekahi huila. Ua ʻōlelo ʻo Seede ua hoʻolālā ʻia ka hoʻohālikelike e wānana i ka nui o ka hoʻokaʻawale ʻana i hāʻawi ʻia i ka laulā paʻa o ka alloy a me nā waiwai waiwai a me ka mana a me ka wikiwiki o ka laser.

"Loaʻa mākou i nā luʻu hohonu i ka hoʻoponopono maikaʻi ʻana i ka microstructure o nā alloys i ʻoi aku ka mana ma luna o nā waiwai o ka mea i paʻi ʻia ma kahi ʻoi aku ka maikaʻi ma mua o ka wā ma mua," wahi a Seede.

Ke piʻi aʻe ka hoʻohana ʻana i nā alloys i AM, pēlā nō nā pilikia i ka paʻi ʻana i nā ʻāpana i kūpono a ʻoi aku paha i nā kūlana o ka hana ʻana. Ma ke aʻo ʻana ʻo Texas A&M e hiki i nā mea hana ke hoʻopaʻa i ka kemika alloy a me ka hana ʻana i nā ʻāpana i hiki ke hoʻolālā ʻia nā alloys no ka hana additive a hiki i nā mea hana ke hoʻomalu i nā microstructures kūloko.

"ʻO kā mākou ʻano hana e hōʻoluʻolu i ka hoʻohana kūleʻa ʻana o nā ʻano hui like ʻole no ka hana hoʻohui me ka ʻole o ka hopohopo o ka hoʻokomo ʻana i nā hemahema, ʻoiai ma ka microscale," i ʻōlelo ai ʻo Polofesa Ibrahim Karaman. "E pōmaikaʻi nui kēia hana i ka ʻoihana aerospace, automotive, a me nā ʻoihana pale e ʻimi mau nei i nā ala maikaʻi aʻe e kūkulu ai i nā ʻāpana metala maʻamau."

Ua ʻōlelo ʻo Polofesa Raymundo Arroyavé a me ke kaukaʻi ʻo Alaa Elwany, ka mea i hui pū me Seede a me Karaman ma ka noiʻi ʻana, hiki ke maʻalahi ke ʻano hana e nā ʻoihana e kūkulu i nā ʻāpana paʻa, kīnā ʻole me kā lākou koho.