Deformation thiab kev puas tsuaj tus cwj pwm ntawm Cu / Al txheej sib xyaw daim hlau raws li tus yam ntxwv interface
Ti / Al txheej txheej daim hlau,Cu / Al txheej daim hlau, thiab Mg / Al txheej cov phaj sib xyaw muaj cov khoom zoo heev thiab tau siv dav hauv aerospace, tsheb ciav hlau, thiab lwm yam. Cu thiab nws cov alloys muaj qhov zoo xws li siab conductivity thiab zoo formability, thaum Al thiab nws cov alloys zoo heev corrosion kuj thiab formability. Cu / Al txheej cov phaj sib xyaw yuav tsum muab cov txiaj ntsig zoo ntawm Cu thiab Al alloys thiab nthuav dav lawv daim ntawv thov kev cia siab. Txawm li cas los xij, thaj tsam cuam tshuam ntawm laminated composite daim hlau
Qhov muaj nyob ntawm Cu / Al txheej cov phaj sib xyaw ua rau lawv muaj kev puas tsuaj thaum lub sij hawm deformation, uas cuam tshuam rau kev ua haujlwm ntawm cov khoom. Nws yog ib qho tseem ceeb los kawm txog kev puas tsuaj tus cwj pwm ntawm Cu / Al txheej txheej txheej thaum lub sij hawm deformation. Nrog txoj kev loj hlob sai ntawm kev lag luam niaj hnub no, tib neeg qhov kev thov rau kev ua tiav ntawm cov khoom siv hlau yog nce. Piv txwv li, thaum txhim kho cov kev ua tau zoo ntawm cov ntaub ntawv thiab nrhiav kev sib tw, ib qho khoom siv yog ib qho nyuaj kom ua tau raws li qhov yuav tsum tau ua kom tiav. Yog li ntawd, hlau txheej cov ntaub ntawv sib xyaw tau tshwm sim.
Lub Cu / Al composite phaj nrog cov txheej txheem txheej txheem sib xyaw ua ke ntawm cov khoom siv hluav taws xob siab thiab zoo formability ntawm Cu nrog rau qhov tsis tshua muaj siab thiab corrosion tsis kam ntawm Al, thiab yog dav siv nyob rau hauv teb xws li aerospace thiab rail transit. Qhov sib txawv ntawm qhov sib txawv morphologies thiab tivthaiv thickness piv ntawm cov hlau txheej sib xyaw phaj muaj qhov cuam tshuam loj rau cov khoom siv hluav taws xob ntawm cov phaj sib xyaw. Kev sib koom ua ke ntawm cov ntsiab lus cuam tshuam thaum lub sij hawm deformation, xws li cov wavy interface morphology ntawm cov phaj sib xyaw npaj los ntawm kev tawg vuam. Composite daim hlau nrog wavy interface morphology muaj ntau dua shear zog thaum lub sij hawm deformation vim cov neeg kho tshuab interlocking nyhuv ntawm txhua yam khoom siv piv rau composite phaj nrog ca interfaces. Cov hlau txheej sib xyaw ua ke muaj qhov cuam tshuam rau kev puas tsuaj thiab tsis ua haujlwm thaum lub sijhawm deformation. Tam sim no, kev tshawb fawb txog kev puas tsuaj ntawm cov phaj sib xyaw feem ntau yog tsom rau txoj kev sim, uas tuaj yeem kawm paub txog kev puas tsuaj ntawm cov khoom siv. Txawm li cas los xij, txoj hauv kev sim muaj qhov tsis muaj zog hauv kev nthuav qhia cov yam ntxwv ntawm keeb kwm deformation thiab kev puas tsuaj ntawm tus cwj pwm ntawm cov hlau txheej sib xyaw phaj ntawm microscale. Cov txheej txheem finite element tuaj yeem tsim cov khoom deformation qauv raws li cov xwm txheej tiag tiag, ua rau nws muaj peev xwm txheeb xyuas cov yam ntxwv ntawm keeb kwm deformation thiab kev puas tsuaj ntawm tus cwj pwm ntawm cov phaj sib xyaw.
Hlau txheej cov phaj sib xyaw muaj qhov zoo ntawm kev siv ntau yam khoom siv hlau thiab tau siv dav hauv kev lag luam xws li aerospace thiab tsheb thauj mus los. Ntawm lawv, txheej txheej txheej yog txoj kev zoo tshaj plaws uas tuaj yeem txhim kho lub zog thiab plasticity ntawm cov ntaub ntawv hlau. Nws tuaj yeem kov yeej kev sib raug zoo ntawm kev sib raug zoo ntawm lub zog thiab plasticity thiab ua tiav qhov kev sib tw zoo ntawm ob, uas tau nyiam ntau yam los ntawm cov kws tshawb fawb. Cov khoom ntawm cov khoom sib txuas ntawm intermetallic nyob rau hauv thaj tsam interface ntawm Cu / Al txheej cov phaj sib txawv kuj txawv ntawm cov hlau matrix. Thaum lub sij hawm deformation txheej txheem, lub interface tuaj yeem tswj cov deformation ntawm cov hlau ntawm ob sab. Txawm li cas los xij, vim muaj cov yam ntxwv ntawm kev sib txuas, cov khoom sib txuas ua rau muaj kev puas tsuaj thiab qhov tsis xws luag thaum lub caij txias txias deformation, uas cuam tshuam rau lawv cov kev pabcuam nyab xeeb. Qhov no txwv lawv daim ntawv thov dav heev thiab dhau los ua kev tsis sib haum xeeb. Yog li ntawd, nws yog ib qho tseem ceeb rau kev tshawb fawb txog kev sib raug zoo ntawm tus cwj pwm kev puas tsuaj thiab kev puas tsuaj los ntawm kev sib koom ua ke ntawm cov yam ntxwv cuam tshuam. Qhov no tau dhau los ua qhov teeb meem tseem ceeb ntawm kev tshawb fawb uas yuav tsum tau hais txog hauv kev tshawb fawb, kev tsim kho, thiab kev siv cov hlau heterogeneous txheej txheej phaj sib sau tshuab.
Los ntawm kev kawm cov yam ntxwv cuam tshuam ntawm Cu / Al hlau txheej cov phaj sib xyaw, qhov kev puas tsuaj ntawm txhua txheej cov khoom tau raug raug, thiab cov qauv tsim tshwj xeeb ntawm Cu / Al txheej txheej cov phaj txiav txim siab thaj tsam ntawm lub interface yog tsim. Kev pib tawg thiab nthuav tawm cov txheej txheem ntawm Cu / Al txheej cov phaj sib xyaw yog kawm los ntawm cov kev sim tensile hauv-situ thiab finite caij simulations, nthuav tawm cov txheej txheem deformation ntawm cov ntaub ntawv ntawm ob sab ntawm kev sib koom ua ke. Cov txiaj ntsig kev sim tuaj yeem siv los txhim kho cov txheej txheem tsim khoom ntawm Cu / Al txheej cov phaj sib xyaw hauv cov theem tom qab, zam kev puas tsuaj rau cov khoom tsim, thiab txhim kho kev ua haujlwm ntawm cov khoom tsim. Cov txiaj ntsig kev tshawb fawb tsis yog tsuas yog txhawb kev tsim cov thev naus laus zis thiab kev xav ntawm cov hlau txheej cov hlau sib xyaw, tab sis kuj tseem muaj qhov tseem ceeb ntawm kev tshawb fawb rau kev txhim kho thiab kev txhim kho ntawm cov khoom tsim kev tshawb xav thiab thev naus laus zis.
