Mgbe ị na-ejikọta ígwè na aluminom, mmeghachi omume n'etiti Fe na Al atọm n'oge usoro njikọ na-etolite ogige intermetallic na-agbaji agbaji (IMCs). Ọnụnọ nke IMC ndị a na-egbochi ike nrụpụta nke njikọ ahụ, ya mere ọ dị mkpa ijikwa ọnụ ọgụgụ nke ogige ndị a. Ihe mere e ji guzobe IMC bụ na solubility nke Fe na Al adịghị mma. Ọ bụrụ na ọ gafere ego ụfọdụ, ọ nwere ike imetụta akụrụngwa akụrụngwa nke weld. Ndị IMC nwere ihe pụrụ iche dị ka isi ike, obere ductility na ike siri ike, yana njiri mara ọdịdị. Nnyocha achọpụtala na e jiri ya tụnyere IMC ndị ọzọ, a na-ahụta oyi akwa Fe2Al5 IMC dị ka nke kacha kewaa (11.8).± 1.8 GPa) usoro IMC, ma bụrụkwa isi ihe kpatara mbelata akụrụngwa akụrụngwa n'ihi ọdịda ịgbado ọkụ. Akwụkwọ a na-enyocha usoro ịgbado ọkụ laser dịpụrụ adịpụ nke Ọ BỤRỤ na ígwè na aluminom 1050 na-eji laser mgbanaka mgbanaka na-agbanwe agbanwe, na-enyocha n'ụzọ miri emi mmetụta nke laser beam udi na nhazi nke ogige intermetallic na akụrụngwa. Site n'ịgbanwe usoro ike isi / mgbanaka, a chọpụtara na n'okpuru ọnọdụ nchịkwa, isi / mgbanaka ike nke 0.2 nwere ike nweta ebe dị mma weld interface bonding n'elu ebe ma na-ebelata ọkpụrụkpụ nke Fe2Al5 IMC, si otú ahụ na-eme ka ike nke nkwonkwo dịkwuo mma. .
Isiokwu a na-ewebata mmetụta nke laser mgbanaka mgbanaka na-agbanwe agbanwe na nhazi nke ogige intermetallic na akụrụngwa n'oge ịgbado ọkụ laser dịpụrụ adịpụ nke Ọ BỤRỤ na aluminom 1050. Nsonaazụ nyocha ahụ na-egosi na n'okpuru ọnọdụ nchịkwa, oke ike isi / mgbanaka nke 0.2 na-enye mpaghara njikọ njikọ weld buru ibu, nke na-egosipụta site na ike shii kacha nke 97.6 N/mm2 (njikọ ọnụ nke 71%). Na mgbakwunye, ma e jiri ya tụnyere Gaussian beams nwere oke ike karịa 1, nke a na-ebelata oke nke Fe2Al5 intermetallic compound (IMC) site na 62% yana njupụta IMC site na 40%. N'ime ọnọdụ perforation, a na-ahụ mgbawa na ike ịkpụ ala ma e jiri ya tụnyere ụkpụrụ nduzi. Ọ dị mma ịmara na a hụrụ nchacha ọka dị ịrịba ama na weld seam mgbe ike isi / mgbanaka bụ 0,5.
Mgbe r=0, naanị loop ike na-eme, ebe mgbe r=1, naanị isi ike na-eme.
Eserese atụmatụ nke oke ike r n'etiti oghere Gaussian na nku anya annular
(a) Ngwa ịgbado ọkụ; (b) Omimi na obosara nke profaịlụ weld; (c) Eserese eserese nke ngosipụta nlele na ntọala ntọala
Nnwale MC: Naanị n'ihe banyere Gaussian beam, weld seam bụ na mbụ na ọnọdụ conduction na-emighị emi (ID 1 na 2), wee tụgharịa gaa n'ụdị mkpọchi mkpọchi akụkụ (ID 3-5), na-apụta ìhè doro anya. Mgbe ike mgbanaka na-abawanye site na 0 ruo 1000 W, ọ dịghị ihe mgbagwoju anya doro anya na ID 7 na omimi nke ịba ụba ígwè dị ntakịrị. Mgbe ike mgbanaka na-abawanye na 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 isi ike dị n'etiti 500 na 1000 W (ID 11 na 12), eriri weld dị na ọnọdụ nhazi; N'ịtụle ID 12 na ID 7, ọ bụ ezie na ike zuru ezu (6000w) bụ otu, ID 7 na-emejuputa 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 ngụkọta ike ruru 7500 W (ID 15), enwere ike nweta ọnọdụ ntinye zuru oke, ma e jiri ya tụnyere 6000 W eji na ID 7, ike nke ụdị ntinye zuru oke na-abawanye nke ukwuu.
Nnwale IC: Ọnọdụ emere (ID 16 na 17) enwetara na ike isi 1500w na ike mgbanaka 3000w na 3500w. Mgbe isi ike bụ 3000w na mgbanaka ike dị n'etiti 1500w na 2500w (ID 19-20), doro anya cracks na-apụta na interface n'etiti ọgaranya ígwè na ọgaranya aluminom, na-akpụ a obodo banye obere oghere ụkpụrụ. Mgbe ike mgbanaka bụ 3000 na 3500w (ID 21 na 22), nweta ọnọdụ igodo ntinye zuru oke.
Ihe nnochite anya obe-ngalaba onyonyo nke njirimara ịgbado ọkụ ọ bụla n'okpuru microscope anya
Ọgụgụ 4. (a) Mmekọrịta dị n'etiti ike tensile kacha (UTS) na ike ike na ule ịgbado ọkụ; (b) Ngụkọta ike niile ịgbado ọkụ ule
Ọgụgụ 5. (a) Mmekọrịta dị n'etiti akụkụ akụkụ na UTS; (b) Mmekọrịta dị n'etiti ndọtị na omimi ntinye na UTS; (c) Njupụta ike maka ule ịgbado ọkụ niile
Ọgụgụ 6. (ac) Vickers microhardness indentation contour map; (df) SEM-EDS kemịkalụ kemịkalụ kwekọrọ maka ịgbado ọkụ n'ụdị ihe nnọchi anya; (g) Eserese atụmatụ nke interface n'etiti ígwè na aluminom; (h) Fe2Al5 na ngụkọta IMC ọkpụrụkpụ nke conductive mode welds
Ọgụgụ 7. (ac) Vickers microhardness indentation contour map; (df) SEM-EDS kemịkalụ ụdịdị kemịkalụ kwekọrọ maka ịgbado ọkụ n'ụdị penetration perforation mpaghara
Ọgụgụ 8. (ac) Vickers microhardness indentation contour map; (df) SEM-EDS kemịkalụ ụdịdị kemịkalụ kwekọrọ maka onye nnọchi anya ụdị ịgbado ọkụ zuru oke.
Ọgụgụ 9. EBSD ibé na-egosi na ọka size nke ígwè ọgaranya region (elu efere) na zuru penetration perforation mode ule, na quantifies ọka size nkesa.
Ọgụgụ 10. SEM-EDS ụdịdị nke interface n'etiti ọgaranya ígwè na ọgaranya aluminum
Ọmụmụ ihe a nyochara mmetụta nke ARM laser na nhazi, microstructure, na akụrụngwa nke IMC na ọ bụrụ na ígwè-1050 aluminum alloy dissimilar lap welded joint. Ọmụmụ ihe ahụ tụlere ụdị ịgbado ọkụ atọ (ọnọdụ njikwa, ọnọdụ ntinye mpaghara, na ụdị ntinye zuru oke) yana ụdị ọkụ laser ahọpụtara atọ (Gaussian beam, annular beam, na Gaussian annular beam). Nsonaazụ nyocha na-egosi na ịhọrọ ike kwesịrị ekwesị nke Gaussian beam na anular beam bụ isi ihe dị mkpa maka ịchịkwa nhazi na microstructure nke carbon modal modal, si otú ahụ na-ebuli akụrụngwa akụrụngwa nke weld. N'ọnọdụ nchịkwa, okirikiri okirikiri nwere oke ike nke 0.2 na-enye ike ịgbado ọkụ kacha mma (71% nkwonkwo arụmọrụ). Na perforation mode, na Gaussian doo amị ukwuu ịgbado ọkụ omimi na elu akụkụ ruru, ma ịgbado ọkụ ike na-budata belata. Igwe ọkụ nke annular nwere oke ike nke 0,5 nwere mmetụta dị ukwuu na nhazigharị nke ọka n'akụkụ nchara na weld seam. Nke a bụ n'ihi na ala elu okpomọkụ nke annular doo na-eduga a ngwa ngwa jụrụ ọnụego, na uto mmachi mmetụta nke Al solute Mbugharị kwupụta n'elu nke weld onuete na ọka Ọdịdị. Enwere njikọ siri ike n'etiti Vickers microhardness na amụma Thermo Calc nke pasent olu nke usoro. Ka ọnụ ọgụgụ olu Fe4Al13 na-abawanye, ka microhardness dị elu.
Oge nzipu: Jan-25-2024
