Mgbe a na-ejikọ ígwè na aluminom, mmeghachi omume dị n'etiti atọm Fe na Al n'oge njikọ ahụ na-emepụta ihe ndị na-agbawa agbawa (IMCs). Ọnụnọ nke IMC ndị a na-egbochi ike igwe nke njikọ ahụ, ya mere ọ dị mkpa ijikwa ọnụọgụ nke ihe ndị a. Ihe kpatara e ji guzobe IMCs bụ na ike ịgbaze Fe na Al adịghị mma. Ọ bụrụ na ọ gafere oke ụfọdụ, ọ nwere ike imetụta ihe ndị dị na igwe nke weld ahụ. IMCs nwere ihe pụrụ iche dịka ike, oke ductility na ike, na atụmatụ morphological. Nnyocha achọpụtala na ma e jiri ya tụnyere IMC ndị ọzọ, a na-ewere oyi akwa Fe2Al5 IMC dị ka nke kachasị agbawa agbawa (11.8) n'ọtụtụ ebe.± 1.8 GPa) usoro IMC, ọ bụkwa isi ihe kpatara mbelata na njirimara igwe n'ihi ọdịda nke ịgbado ọkụ. Akwụkwọ a na-enyocha usoro ịgbado ọkụ laser dịpụrụ adịpụ nke ígwè IF na aluminom 1050 site na iji laser ụdị mgbanaka a na-agbanwe agbanwe, ma na-enyocha nke ọma mmetụta nke ọdịdị ogwe laser na nhazi nke ogige intermetallic na njirimara igwe. Site na ịgbanwe oke ike isi/mgbanaka, achọpụtara na n'okpuru ọnọdụ conduction, oke ike isi/mgbanaka nke 0.2 nwere ike nweta mpaghara elu njikọ njikọta weld ka mma ma belata ọkpụrụkpụ nke Fe2Al5 IMC nke ukwuu, si otú a na-eme ka ike shear nke nkwonkwo dịkwuo mma.
Isiokwu a na-egosi mmetụta nke laser ụdị mgbanaka a na-agbanwe agbanwe na nhazi nke ngwakọta intermetallic na ihe ndị dị na igwe n'oge ịgbado ọkụ laser dịpụrụ adịpụ nke ígwè IF na aluminom 1050. Nsonaazụ nyocha ahụ na-egosi na n'okpuru ọnọdụ conduction, oke ike isi/mgbanaka nke 0.2 na-enye mpaghara elu njikọ njikọta weld buru ibu, nke a na-egosipụta site na ike shea kachasị nke 97.6 N/mm2 (arụmọrụ nkwonkwo nke 71%). Na mgbakwunye, ma e jiri ya tụnyere osisi Gaussian nwere oke ike karịrị 1, nke a na-ebelata ọkpụrụkpụ nke Fe2Al5 intermetallic compound (IMC) nke ukwuu site na 62% na oke ọkpụrụkpụ IMC niile site na 40%. Na ụdị oghere, a hụrụ mgbawa na ike shea dị ala ma e jiri ya tụnyere ụdị conduction. Ọ dị mkpa ịmara na a hụrụ mmezi ọka dị mkpa na seam weld mgbe oke ike isi/mgbanaka bụ 0.5.
Mgbe r=0, naanị ike loop ka a na-emepụta, ebe mgbe r=1, naanị ike isi ka a na-emepụta.
Ihe osise eserese nke oke ike r n'etiti oghere Gaussian na oghere annular
(a) Ngwaọrụ ịgbado ọkụ; (b) Omimi na obosara nke profaịlụ ịgbado ọkụ; (c) Eserese eserese nke igosi ntọala ihe nlele na ihe ndozi.
Nnwale MC: Naanị n'ihe gbasara Gaussian beam, njikọta weld na-amalite n'ụdị conduction dị omimi (ID 1 na 2), wee gbanwee gaa na ọnọdụ mkpọchi nke na-abanye n'ime akụkụ (ID 3-5), yana mgbawa doro anya na-apụta. Mgbe ike mgbanaka ahụ mụbara site na 0 ruo 1000 W, enweghị mgbawa doro anya na ID 7 na omimi nke mmụba ígwè dị obere. Mgbe ike mgbanaka ahụ mụbara ruo 2000 na 2500 W (ID 9 na 10), omimi nke mpaghara ígwè bara ụba na-abawanye. Oke mgbawa na ike mgbanaka 2500w (ID 10).
Nnwale MR: Mgbe ike isi dị n'etiti 500 na 1000 W (ID 11 na 12), njikọta weld dị n'ụdị conduction; Site na iji ID 12 na ID 7 tụnyere, ọ bụ ezie na ike zuru oke (6000w) bụ otu, ID 7 na-etinye ọnọdụ oghere mkpọchi. Nke a bụ n'ihi mbelata dị ukwuu na njupụta ike na ID 12 n'ihi njirimara loop kachasị (r=0.2). Mgbe ike zuru oke ruru 7500 W (ID 15), enwere ike nweta ụdị ntinye zuru oke, ma tụnyere 6000 W ejiri na ID 7, ike nke ụdị ntinye zuru oke na-abawanye nke ukwuu.
Nnwale IC: E nwetara ụdị e duziri (ID 16 na 17) na ike isi 1500w na ike mgbanaka 3000w na 3500w. Mgbe ike isi bụ 3000w na ike mgbanaka dị n'etiti 1500w na 2500w (ID 19-20), mgbawa doro anya na-apụta na njikọ dị n'etiti ígwè bara ụba na aluminom bara ụba, na-emepụta obere oghere mpaghara na-abanye. Mgbe ike mgbanaka bụ 3000 na 3500w (ID 21 na 22), nweta ụdị oghere isi zuru oke.
Foto ndị nnọchi anya nke njirimara njikọta ọ bụla n'okpuru microscope optical
Foto nke 4. (a) Mmekọrịta dị n'etiti ike nrụgide kachasị elu (UTS) na oke ike na ule ịgbado ọkụ; (b) Ike zuru oke nke ule ịgbado ọkụ niile
Foto nke 5. (a) Mmekọrịta dị n'etiti oke akụkụ na UTS; (b) Mmekọrịta dị n'etiti ndọtị na omimi ntinye na UTS; (c) Njupụta ike maka ule ịgbado ọkụ niile
Foto nke 6. (ac) Maapụ nhazi nke Vickers microhardness indentation; (df) Spektra kemịkalụ SEM-EDS kwekọrọ maka ịgbado ụdị conduction nnọchite anya; (g) Foto eserese nke njikọ dị n'etiti ígwè na aluminom; (h) Fe2Al5 na mkpokọta ọkpụrụkpụ IMC nke welds ụdị conductive
Foto nke 7. (ac) Maapụ nhazi nke Vickers microhardness; (df) Ụdị kemịkalụ SEM-EDS kwekọrọ na ya maka njikọta ụdị oghere mpaghara
Foto nke 8. (ac) Maapụ nhazi nke Vickers microhardness indentation; (df) Ụdị kemịkalụ SEM-EDS kwekọrọ maka njikọta ụdị oghere zuru oke nke nnọchite anya
Foto nke 9. Ihe osise EBSD na-egosi nha ọka nke mpaghara bara ụba nke ígwè (elu efere) na nnwale ụdị oghere zuru oke, ma na-enyocha nkesa nha ọka ahụ.
Foto nke 10. SEM-EDS spectra nke njikọ dị n'etiti ígwè bara ụba na aluminom bara ụba
Ọmụmụ ihe a nyochachara mmetụta nke laser ARM na nhazi, nhazi obere, na ihe onwunwe mekanikal nke IMC na njikọ IF metal-1050 aluminum alloy dissimilar lap welded. Ọmụmụ ihe ahụ tụlere ụdị njikọta atọ (ụdị nhazi, ụdị ntinye mpaghara, na ụdị ntinye zuru oke) na ụdị oghere laser atọ ahọpụtara (ebe Gaussian, ebe annular, na ebe Gaussian annular). Nsonaazụ nyocha ahụ na-egosi na ịhọrọ oke ike kwesịrị ekwesị nke ebe Gaussian na ebe annular bụ paramita dị mkpa maka ijikwa nhazi na obere nhazi nke carbon modal dị n'ime, si otú a na-eme ka njirimara mekanikal nke weld dịkwuo elu. Na ụdị njikọ, ogwe okirikiri nwere oke ike nke 0.2 na-enye ike njikọta kacha mma (71% arụmọrụ nkwonkwo). Na ụdị oghere, ogwe Gaussian na-emepụta omimi ịgbado ọkụ ka ukwuu na oke akụkụ dị elu, mana ike ịgbado ọkụ na-ebelata nke ukwuu. Ogwe annular nwere oke ike nke 0.5 nwere mmetụta dị ukwuu na nhazi nke mkpụrụ akụkụ ígwè na njikọta weld. Nke a bụ n'ihi obere okpomọkụ nke oghere annular na-eduga na ọsọ oyi ngwa ngwa, yana mmetụta mgbochi uto nke mbugharị Al solute gaa n'akụkụ elu nke njikọta weld na nhazi ọka. Enwere njikọ siri ike n'etiti Vickers microhardness na amụma Thermo Calc nke pasent olu nke usoro. Ka pasent olu nke Fe4Al13 buru ibu, otú ahụ ka microhardness ka elu.
Oge ozi: Jenụwarị-25-2024
