Tasirin laser mai daidaita makamashi mai daidaitawa akan samuwar da kaddarorin injiniya na mahaɗan intermetallic a cikin gidajen haɗin gwiwa na ƙarfe na laser aluminum

Lokacin haɗa ƙarfe da aluminum, amsawar da ke tsakanin ƙwayoyin Fe da Al a lokacin haɗin yana samar da mahaɗan intermetallic masu rauni (IMCs). Kasancewar waɗannan IMCs yana iyakance ƙarfin injina na haɗin, don haka ya zama dole a sarrafa adadin waɗannan mahaɗan. Dalilin samuwar IMCs shine cewa narkewar Fe a cikin Al ba shi da kyau. Idan ya wuce wani adadin, yana iya shafar halayen injina na walda. IMCs suna da halaye na musamman kamar tauri, ƙarancin ductility da tauri, da fasalulluka na siffa. Bincike ya gano cewa idan aka kwatanta da sauran IMCs, ana ɗaukar Layer na Fe2Al5 IMC a matsayin mafi rauni (11.8) sosai.± 1.8 GPa) matakin IMC, kuma shine babban dalilin raguwar halayen injiniya saboda gazawar walda. Wannan takarda tana bincika tsarin walda na laser mai nisa na ƙarfe IF da aluminum 1050 ta amfani da laser yanayin zobe mai daidaitawa, kuma tana bincike sosai kan tasirin siffar hasken laser akan samuwar mahaɗan ƙarfe da halayen injiniya. Ta hanyar daidaita rabon ƙarfin tsakiya/zobe, an gano cewa a ƙarƙashin yanayin watsawa, rabon ƙarfin tsakiya/zobe na 0.2 na iya samun ingantaccen yanki na haɗin haɗin haɗin walda da rage kauri na Fe2Al5 IMC sosai, ta haka ne inganta ƙarfin yanke haɗin.

Wannan labarin ya gabatar da tasirin laser yanayin zobe mai daidaitawa akan samuwar mahaɗan ƙarfe da halayen injiniya yayin walda na laser mai nisa na ƙarfe IF da aluminum 1050. Sakamakon binciken ya nuna cewa a ƙarƙashin yanayin watsawa, rabon ƙarfin tsakiya/zobe na 0.2 yana samar da babban yanki na haɗin haɗin walda, wanda ke nuna ƙarfin yankewa na 97.6 N/mm2 (ingancin haɗin gwiwa na 71%). Bugu da ƙari, idan aka kwatanta da haskoki na Gaussian waɗanda suka fi 1, wannan yana rage kauri na mahaɗin Fe2Al5 intermetallic (IMC) da 62% da jimlar kauri na IMC da 40%. A cikin yanayin hudawa, an lura da tsagewa da ƙarancin ƙarfin yankewa idan aka kwatanta da yanayin watsawa. Ya kamata a lura cewa an lura da ingantaccen gyaran hatsi a cikin ɗinkin walda lokacin da rabon ƙarfin tsakiya/zobe ya kasance 0.5.

Idan r=0, ƙarfin madauki ne kawai ake samarwa, yayin da idan r=1, ƙarfin tsakiya ne kawai ake samarwa.

Tsarin zane na rabon iko r tsakanin hasken Gaussian da hasken annular

(a) Na'urar walda; (b) Zurfi da faɗin bayanin martabar walda; (c) Zane mai tsari na nuna samfuran da saitunan kayan aiki

Gwajin MC: Sai dai idan aka yi amfani da hasken Gaussian, dinkin walda yana farawa ne a yanayin isar da sako mara zurfi (ID 1 da 2), sannan ya koma yanayin ramin kullewa (ID 3-5), tare da fasawa bayyanannu da ke bayyana. Lokacin da ƙarfin zobe ya ƙaru daga 0 zuwa 1000 W, babu tsagewa bayyanannu a ID 7 kuma zurfin wadatar ƙarfe ya yi ƙanƙanta. Lokacin da ƙarfin zobe ya ƙaru zuwa 2000 da 2500 W (ID 9 da 10), zurfin yankin ƙarfe mai arziki yana ƙaruwa. Tsagewa da yawa a ƙarfin zobe 2500w (ID 10).

Gwajin MR: Lokacin da ƙarfin tsakiya yake tsakanin 500 da 1000 W (ID 11 da 12), ɗinkin walda yana cikin yanayin gudanarwa; Idan aka kwatanta ID 12 da ID 7, kodayake jimlar ƙarfin (6000w) iri ɗaya ne, ID 7 yana aiwatar da yanayin ramin kullewa. Wannan ya faru ne saboda raguwar yawan wutar lantarki a ID 12 saboda halayyar madauki mai rinjaye (r=0.2). Lokacin da jimlar ƙarfin ya kai 7500 W (ID 15), ana iya cimma cikakken yanayin shigar ciki, kuma idan aka kwatanta da 6000 W da aka yi amfani da shi a ID 7, ƙarfin yanayin shigar ciki yana ƙaruwa sosai.

Gwajin IC: An cimma yanayin da aka gudanar (ID 16 da 17) a ƙarfin tsakiya na 1500w da ƙarfin zobe na 3000w da 3500w. Lokacin da ƙarfin tsakiya na 3000w kuma ƙarfin zobe yana tsakanin 1500w da 2500w (ID 19-20), fashewar bayyanannu tana bayyana a mahaɗin tsakanin ƙarfe mai wadata da aluminum mai wadata, suna samar da ƙaramin rami mai shiga na gida. Lokacin da ƙarfin zobe shine 3000 da 3500w (ID 21 da 22), cimma cikakken yanayin ramin maɓalli.

Hotunan da aka ɗauka daga sassan giciye na kowace ganewar walda a ƙarƙashin na'urar hangen nesa

Hoto na 4. (a) Alaƙar da ke tsakanin ƙarfin juriya (UTS) da rabon ƙarfi a gwaje-gwajen walda; (b) Jimlar ƙarfin duk gwaje-gwajen walda

Hoto na 5. (a) Alaƙa tsakanin rabon al'amari da UTS; (b) Alaƙa tsakanin faɗaɗawa da zurfin shiga da UTS; (c) Yawan ƙarfi ga duk gwaje-gwajen walda

Hoto na 6. (ac) Taswirar yanayin shigar da Vickers microhardness; (df) Siffar sinadarai masu dacewa ta SEM-EDS don walda yanayin isar da saƙo; (g) Zane mai tsari na haɗin gwiwa tsakanin ƙarfe da aluminum; (h) Fe2Al5 da kauri IMC na walda yanayin isar da saƙo

Hoto na 7. (ac) Taswirar ma'aunin shigar da Vickers microhardness; (df) Tsarin sinadarai na SEM-EDS mai dacewa don wakilcin yanayin shigar da shi a cikin gida

Hoto na 8. (ac) Taswirar ma'aunin shigar da Vickers microhardness; (df) Tsarin sinadarai na SEM-EDS mai dacewa don wakilcin yanayin shigar da cikakken shiga

Hoto na 9. Tsarin EBSD yana nuna girman hatsi na yankin ƙarfe mai arzikin ƙarfe (farantin sama) a cikin gwajin yanayin ramin shiga gaba ɗaya, kuma yana ƙididdige rarraba girman hatsi

Hoto na 10. Siffar SEM-EDS ta mahaɗin da ke tsakanin ƙarfe mai yawa da aluminum mai yawa

Wannan binciken ya binciki tasirin laser na ARM akan samuwar, tsarin ƙananan abubuwa, da halayen injiniya na IMC a cikin haɗin haɗin aluminum na ƙarfe IF-1050 mai launi daban-daban. Binciken ya yi la'akari da yanayin walda guda uku (yanayin gudanarwa, yanayin shigar ciki na gida, da yanayin shigar ciki cikakke) da kuma siffofi uku na hasken laser da aka zaɓa (yanayin Gaussian, hasken annular, da hasken Gaussian mai haske). Sakamakon binciken ya nuna cewa zaɓar rabon wutar lantarki da ya dace na hasken Gaussian da hasken annular babban ma'auni ne don sarrafa samuwar da tsarin carbon na ciki, ta haka ne ke haɓaka halayen injin na walda. A yanayin isar da wutar lantarki, hasken da ke da ma'aunin wutar lantarki na 0.2 yana ba da mafi kyawun ƙarfin walda (ingancin haɗin gwiwa 71%). A yanayin huda wutar lantarki, hasken Gaussian yana samar da zurfin walda mafi girma da kuma babban rabon al'amari, amma ƙarfin walda yana raguwa sosai. Hasken annular tare da rabon wutar lantarki na 0.5 yana da tasiri mai mahimmanci akan tsaftace ƙwayoyin gefen ƙarfe a cikin ɗinkin walda. Wannan ya faru ne saboda ƙarancin zafin jiki na hasken rana wanda ke haifar da saurin sanyaya, da kuma tasirin hana ci gaban ƙaurar Al solute zuwa ɓangaren sama na dinkin walda akan tsarin hatsi. Akwai alaƙa mai ƙarfi tsakanin Vickers microhardness da hasashen Thermo Calc na kashi na girman matakin. Girman kashi na Fe4Al13, mafi girman ƙarfin microhardness.