Kev tshawb fawb raws li txoj cai thiab kev nce qib ntawm kev ua cov thev naus laus zis ntawm titanium matrix composites (TiMMCs) tau raug tshuaj xyuas los ntawm cov kev ua haujlwm ntawm cov tshuab ua haujlwm ib txwm muaj, cov khoom siv hluav taws xob sib xyaw ua haujlwm, kev tsim khoom thiab kev tsim khoom ntxiv. Cov yam ntxwv ntawm TiMMCs ua tiav los ntawm cov txheej txheem sib txawv. Lub hom phiaj ntawm cov teeb meem tseem ceeb hauv kev tshawb fawb tam sim no, txoj kev txhim kho ntawm TiMMCs ua cov thev naus laus zis yav tom ntej yog kev cia siab.
duab
Tus kws tshawb fawb-theem senior engineer Wang Guangping
01
lus qhuab qhia
Titanium thiab nws cov alloys tau siv dav hauv aerospace, petrochemical, marine thiab kev kho mob thaj chaw vim lawv cov khoom zoo xws li lub zog tshwj xeeb, tshuaj tiv thaiv corrosion zoo heev thiab biocompatibility zoo [1-4]. Txawm li cas los xij, cov Young's modulus, hnav tsis kam, thiab kub tsis kam ntawm titanium alloys qis dua cov hlau thiab npib tsib xee-raws li alloys, uas txwv lawv cov kev siv ntxiv hauv tsheb thiab aerospace teb [5-8]. Qhov tshwm sim ntawm titanium matrix composites (TiMMCs) muab lwm txoj hauv kev los daws cov teeb meem saum toj no. TiMMCs yog cov khoom sib xyaw ua ke ntawm titanium thiab nws cov alloys raws li cov matrix thiab ceramics (particles, whiskers, luv fibers thiab nruam ntev fibers) raws li cov theem txhawb zog (saib daim duab 1).
duab
a) Nruam ntev fiber reinforced titanium matrix composites
duab
b) Particle-reinforced titanium-based composites c) Whisker / luv fiber-reinforced titanium-based composites
Daim duab 1 Schematic daim duab ntawm TiMMCs nrog ntau hom kev txhawb zog theem
Thaum tuav cov khoom zoo ntawm cov matrix, TiMMCs kuj tseem tuaj yeem tau txais cov khoom zoo uas tsis tuaj yeem ua tiav los ntawm ib theem kev txhawb zog lossis matrix los ntawm kev sib ntxiv thiab kev sib raug zoo ntawm cov khoom ntawm fiber ntau thiab matrix. Piv txwv li, lub zog tawm los ntawm (TiC ntxiv rau Ti5Si3) / Ti composite npaj los ntawm HUO li al. [9] yog siab li 829MPa, uas yog 178 feem pua siab dua li cov ntshiab titanium, thaum tuav lub siab elongation ntawm 8.1 feem pua, thiab muaj lub zog siab thiab nruab nrab plasticity. Piv nrog rau cov laminated TiC/Ti composites, lub zog thiab ductility ntawm TiMMCs ib txhij txhim kho, uas ua rau ib tug zoo heev zog-ductility synergistic kev ua tau zoo. Lub siab tshwj xeeb modulus ntawm TiMMCs yog lub hauv paus tseem ceeb los txhawb nws txoj kev siv dav hauv dav hlau fuselage, thaum lub zog tshwj xeeb yog lub zog tsav los txhawb nws daim ntawv thov hauv kev lag luam cav [10]. Piv txwv li, Tebchaws Meskas tau ua tus thawj coj hauv kev siv cov khoom siv titanium-based composites los tsim cov tshuab aero-engine. Cov particle-reinforced titanium-based composite rotor blades tsim los ntawm Tebchaws Meskas tau ua tiav zoo, uas tsis yog tsuas yog txhim kho kev ua haujlwm ntawm rotor hniav, tab sis kuj txo aviation. Tus nqi tsim khoom ntawm lub cav poob los ntawm ntau npaum li $60,000 [11]. Lub tuam txhab Boeing Aircraft ntawm Tebchaws Meskas tau tsim cov khoom siv titanium-based composite aircraft tsaws iav txuas pas nrig, uas tsis tsuas yog muaj qhov kub thiab txias, tab sis kuj txo cov huab hwm coj los ntawm ze li ntawm 40 feem pua piv rau qhov ua ntej kev txhim kho. , thiab tau ua tiav kev thov ntawm lub dav hlau Boeing 787 [12] . Lub Chaw Tshawb Fawb Atlantic ntawm Tebchaws Meskas tau ua tiav cov khoom siv ua kom muaj zog titanium-raws li cov khoom sib xyaw rau qhov dav hlau tsaws iav, thiab nws tau ua tiav tiav. Piv nrog rau cov khoom siv tsoos, qhov hnyav tau txo qis heev [13]. Lub Chaw Tshawb Fawb Fabkis Aeronautical thiab lub tuam txhab British Rolls-Royce tau siv cov khoom siv titanium matrix sib xyaw ua ke los npaj cov tshuab aero-engine thiab ua tiav [14, 15]. Hauv kev lag luam tsheb, cov kev xav tau rau cov qauv teeb pom kev zoo tau nce zuj zus, uas txhawb kev siv TiMMCs zoo heev. Toyota Corporation ntawm Nyij Pooj thawj zaug siv BTi / Ti cov ntaub ntawv sib xyaw rau lub tsheb tso tawm li qub, lub tsheb lub cav tso pa tawm thiab lwm yam, lub cav valve, thiab lwm yam. Tag nrho cov huab hwm coj tau txo los ntawm ze li 40 feem pua, thiab nws muaj qhov zoo ntawm lub neej thiab tus nqi qis. [16]. Nyob rau tib lub sijhawm, cov teb chaws xws li Europe thiab Tebchaws Meskas kuj tau pib siv cov khoom siv titanium-raws li cov khoom siv sib xyaw los hloov cov khoom siv hlau ib txwm siv los tsim cov khoom tseem ceeb ntawm tsheb, txhawm rau txo qhov hnyav ntawm tsheb thiab txhim kho ntxiv. kev ua haujlwm ntawm lub tsheb [17] Daim ntawv thov ntau yam ntawm TiMMCs muaj nyob rau hauv daim duab 2.
duab
Daim duab 2 Daim ntawv thov ntau yam ntawm TiMMCs
Vim yog qhov nyuaj ntawm cov ntaub ntawv muaj pes tsawg leeg, TiMMCs yog qhov nyuaj rau kev ua haujlwm ntau dua li cov khoom siv engineering, thiab yog hom tshiab ntawm cov khoom siv nyuaj. Lub caij no, txawm hais tias TiMMCs uas muaj qhov sib npaug sib npaug los yog cov khoom siv tsis tu ncua feem ntau pom muaj zog dua, qhov ductility thiab toughness txheeb ze rau cov ntshiab matrix yog inevitably cuam tshuam [18]. Piv txwv li, txawm tias nyob rau hauv-situ TiC thiab Ti5Si3, cov ntaub ntawv tensile qhia tau hais tias lub elongation ntawm so poob sharply los ntawm 17.2 feem pua mus rau 1.53 feem pua thaum lub zog tawm los ntawm cov khoom sib xyaw nce mus txog 410MPa, uas tso cov kev xav tau siab dua ntawm kev siv tshuab [19 ]. Yog li ntawd, yuav ua li cas kom tau txais kev ua tau zoo thiab kev puas tsuaj tsawg ntawm TiMMCs tau dhau los ua qhov kev tshawb fawb hotspot hauv kev ua cov khoom sib xyaw.
Cov txheej txheem kev ua haujlwm zoo ntawm TiMMCs suav nrog kev siv tshuab, forging, casting, thiab additive manufacturing [20]. Machining cia siab rau cov neeg kho tshuab quab yuam los hloov cov duab ntawm cov ntaub ntawv, uas tuaj yeem ua tau zoo ntawm kev tsim khoom thiab kev ua batch. Nws yog ib qho ntawm feem ntau siv cov txheej txheem txias txias. Nws tuaj yeem ua tiav qhov ntev-precision siab thiab qhov yuav tsum tau ua kom zoo, thiab tsim nyog rau ntau hom ntaub ntawv suav nrog cov khoom sib xyaw. kev ua cov khoom siv. Kev ua haujlwm zoo xws li txiav, drilling, milling, thiab sib tsoo. Forging, casting, thiab additive manufacturing yog cov txheej txheem thermal uas tuaj yeem txhim kho cov khoom siv thiab cov qauv ntawm cov ntaub ntawv sib xyaw [21]. Tsis tas li ntawd, thaum xaiv cov txheej txheem tsim nyog los ua cov txheej txheem TiMMCs, nws yuav tsum ua tib zoo xav txog qhov sib txawv ntawm txhua yam khoom siv hauv cov khoom sib xyaw, nrog rau kev hnav thiab thermal nthuav ntawm cov khoom sib xyaw thiab cov cuab yeej ua haujlwm, txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhuam hniav tau TiMMCs qhov chaw nrog kev ua tau zoo heev.
Nyob rau hauv daim ntawv no, tam sim no ua technology ntawm TiMMCs yog tshuaj xyuas, thiab cov txheej txheem ntawm TiMMCs nyob rau hauv lub neej yav tom ntej yog prospected, nyob rau hauv thiaj li yuav muab theoretical txhawb rau cov high-kev ua tau zoo daim ntawv thov ntawm TiMMCs.
02
Tshuab dhos
Vim muaj kev txwv ntawm kev npaj thev naus laus zis ntawm TiMMCs, machining tseem yog txheej txheem tseem ceeb hauv kev tsim cov TiMMCs. Piv nrog rau cov khoom siv matrix, qhov kev txhawb zog muaj zog dua, muaj zog dua, thiab kev ua haujlwm nyuaj dua, thiab yuav muaj teeb meem xws li kev txhawb zog theem fragmentation, rub tawm thiab debonding thaum ua. Cov txheej txheem txiav ntawm TiMMCs tau kawm tiav nyob rau hauv cov nqe lus ntawm optimization thiab lwm yam.
2.1 Machining
Lub hom phiaj ntawm qhov tsis muaj kev tshawb fawb txog kev txiav cov kev ua tau zoo xws li cov cuab yeej siv tshuab, txiav quab yuam thiab txiav kub hloov hauv cov txheej txheem txiav ntawm TiMMCs, Bian Weiliang [22] tau tshawb fawb txog kev ua tau zoo ntawm cov cuab yeej sib txawv (TiCp plus TiB w) /TC4. Ib leeg siv lead ua pob zeb diamond thiab cemented carbide yog siv rau hauv cov khoom siv. Nyob rau hauv tib txoj kev txiav, lub neej ntawm cov cuab yeej PCD ntev dua. Thaum cov cuab yeej siv lead ua pob zeb ib leeg txiav TiMMCs, qhov hnav ntawm lub cuab yeej feem ntau yog los ntawm kev rov ua dua tshiab ntawm kev ua kom muaj zog hardness ntawm cov cuab yeej. Thaum txiav TC4 alloy ib leeg, titanium alloy yog sib koom ua ke rau lub cuab yeej thiab Kev hnav los ntawm kev sib txawv ntawm cov khoom siv rau cov cuab yeej tseem ceeb dua. Thaum machining TiMMCs nrog cov cuab yeej cemented carbide, qhov sib txawv thiab kev sib txuas ntawm cov khoom siv ua haujlwm kuj pom tseeb.
Txhawm rau txhawm rau tshawb nrhiav kev cuam tshuam ntawm kev txiav tsis thiab lubrication txoj kev ntawm machining yam ntxwv, NIKNAM li al. [23] tau ua tiav qhov kev sim ua kom qhuav thiab ib nrab qhuav ntawm particle-reinforced titanium matrix composites (PTMCs), thiab txheeb xyuas qhov txiav quab yuam nyob rau hauv qhov sib txawv txiav. , nto roughness thiab particle tshem tawm tus cwj pwm. Cov txiaj ntsig tau pom tias lub zog txiav ntau dua nyob rau hauv ib nrab qhuav, thiab cov yeeb yaj kiab ntawm cov roj nplua nyeem yuav raug tsim tawm, uas cuam tshuam qhov kev vam meej ntawm kev txiav.
DUONG et al. [24] tau kawm txog kev coj tus cwj pwm thawj zaug thaum TiMMCs tig, thiab pom tias hnav yog qhov tseem ceeb tshaj plaws hauv kev txiav TiMMCs, thiab diffusion thiab adhesion tau pom nyob rau hauv txhua yam. Thiab ib daim ntawv hnav tshiab ntawm cov tawv nyias txheej tau pom nyob rau hauv cov txheej txheem ntawm machining, uas nyob rau hauv cov ntaub ntawv no yuav ua rau diffusion hnav thiab mechanical qog. Sib txawv ntawm PTMCs, nruam fiber ntau ntxiv titanium matrix composites muaj anisotropy tshwj xeeb vim qhov txuas ntxiv ntawm fibers. Txhawm rau kom paub meej txog kev txiav cov txheej txheem ntawm cov fiber ntau txuas ntxiv titanium matrix composites, ZAN[25] et al. SiCf/Ti-6Al-4V orthogonal txiav xeem tau txais cov nti tsim tus cwj pwm thiab cov txheej txheem deformation ntawm cov khoom sib xyaw ntawm qhov kub thiab txias, chav tsev kub thiab kub, thiab pom tias piv nrog kev tsim ntawm adiabatic shear band thaum lub sij hawm txiav cov txheej txheem ntawm titanium alloy, SiCf/Ti Qhov dav ntawm -6Al-4V sawtooth loj dua. Daim duab 3 yog daim duab schematic ntawm SiCf/Ti-6Al-4V alternating txheej txiav ntawm qhov sib txawv.
duab
a) Cryogenic (CT)
duab
b) Chav ntsuas kub (RT)
Fig.3 Txiav daim duab ntawm alternating txheej ntawm fiber ntau titanium matrix composites ntawm qhov sib txawv kub
2.2 Sib tsoo
Kev sib tsoo cia siab rau ntau cov nplej abrasive rau ntawm qhov chaw sib tsoo rau ib txhij txiav lub workpiece kom tshem tawm cov khoom, uas yog tsim rau precision thiab ultra-precision machining ntawm cov ntaub ntawv. DING et al. [26, 27] tsim kom muaj peb-dimensional finite element qauv ntawm cov txheej txheem sib tsoo kom nkag siab txog kev tshem tawm cov khoom ntawm TiCp/Ti-6Al-4V thaum lub sij hawm sib tsoo thiab kev sib tsoo ceev, thiab raws li tus qauv finite element, tham txog kev tshem tawm cov khoom siv. Kev tshem tawm tus cwj pwm thiab cov txiaj ntsig ntawm kev sib tsoo ceev ntawm kev tsim cov tshuab ua haujlwm saum npoo (saib daim duab 4). Cov txiaj ntsig tau pom tias tus cwj pwm tshem tawm cov khoom siv thaum lub sij hawm sib tsoo ntawm TiCp/Ti-6Al-4V tuaj yeem muab faib ua cov khoom tshem tawm ntawm cov hlau matrix thiab nkig tshem tawm ntawm TiC cov khoom ntxiv. Ib yam li ntawd, LIU et al. [28] xaus lus tias kev tshem tawm cov khoom siv hauv kev sib tsoo ntawm PTMCs tuaj yeem muab faib ua plaub theem: kev tshem tawm cov yas ntawm cov hlau matrix, tawg pib hauv kev txhim kho cov khoom, tawg tawm hauv cov khoom zoo dua qub, thiab cov khoom tsis zoo ntawm cov khoom zoo. Piv nrog rau kev sib tsoo ceev, undeformed nti thickness muaj kev cuam tshuam ntau dua ntawm kev tsim cov tshuab deg deg. Hauv qhov no, LI et al. [29, 30] kawm txog kev sib tsoo ntawm ib txheej electroplated CBN sib tsoo log thiab brazed CBN sib tsoo log rau PTMCs (saib daim duab 5). Cov txiaj ntsig tau pom tias ib txheej txheej brazed CBN sib tsoo lub log yog qhov tsim nyog tshaj li electroplated sib tsoo log rau kev sib tsoo ceev ntawm PTMCs. Liu Chaojie et al. [31] txheeb xyuas qhov sib tsoo quab yuam qauv ntawm PTMCs sab sib tsoo los ntawm kev simulation. Thaum tshem tawm cov matrix, qhov hloov pauv ntawm kev sib tsoo quab yuam yog tsis tu ncua. Thaum tshem tawm TiC cov khoom siv ntxiv, cov kab nrib pleb yuav tshwm thiab nthuav dav ntawm cov khoom siv. Kuj tseem muaj cov chips loj heev raug tshem tawm ntawm qhov chaw, thiab qhov hloov pauv ntawm kev sib tsoo quab yuam nyob rau hauv qhov chaw uas cov khoom siv txhawb zog tshem tawm yog loj. Tsis tas li ntawd, qhov qub thiab tangential sib tsoo rog ob leeg nce nrog qhov nce ntawm ib qho abrasive nti tuab.
duab
a) Kev sib tsoo PTMCs simulation
duab
b) Cov txiaj ntsig ntawm kev sib tsoo zoo tib yam PTMCs
duab
c) Simulation ntawm high-speed sib tsoo PTMCs
duab
d) Kev sim cov txiaj ntsig ntawm kev sib tsoo ceev ntawm PTMCs
Fig. 4 Simulation thiab xeem cov txiaj ntsig ntawm PTMCs tshem tawm tus cwj pwm ntawm qhov sib txawv
(vs =3m/min, ap=0.010mm)
duab
a) Sib tsoo nrog electroplated CBN sib tsoo log
duab
b) Sib tsoo nrog brazed CBN sib tsoo log
Daim duab 5 Kev sib piv ntawm electroplated CBN sib tsoo log thiab brazed CBN sib tsoo log rau kev sib tsoo PTMCs
03
Composite zog teb ua
Ultrasonic kev co pab sib tsoo yog ib tug compound ua technology uas qhia ultrasonic kev co rau cov tsoos sib tsoo tshuab kom txo tau qhov kub thiab txhim khu kev sib tsoo zoo. Nyob rau hauv ultrasonic kev co-pab machining, lub xeev kev sib cuag ntawm lub cuab tam thiab lub workpiece hloov vim high-frequency kev co, thiab lub cuab tam thiab lub workpiece nyob rau hauv intermittent kev sib cuag, nrog rau cavitation cuam tshuam thiab high-frequency cuam tshuam, thiaj li hais tias cov kev sib cuag ntawm cov khoom. lub workpiece thiab cov cuab yeej Kev sib txhuam quab yuam yog txo, yog li txo qhov kev txiav cov cua sov thiab txiav quab yuam, thiab tuaj yeem ua rau kev pab cuam lub neej ntawm cov cuab yeej thiab txhim kho kev ua haujlwm zoo. Ultrasonic vibration assisted machining thev naus laus zis tau siv dav hauv cov ntaub ntawv nyuaj rau tshuab xws li nickel-based alloys, TiMMCs, thiab ceramic matrix composites.
WU et al. [32] tau ua ib qho axial ultrasonic vibration-pab sib tsoo kuaj ntawm PTMCs, thiab pom tias nyob rau hauv qhov kev txiav txim ntawm ultrasound, txiav trajectory ntawm abrasive nplej nce, thiab cov nplej abrasive rov nias rau ntawm qhov chaw ntawm lub workpiece kom txo tau qhov roughness. tus nqi. YUS et al. [33] nqa tawm lub ultrasonic vibration pab sib tsoo xeem ntawm PTMCs ib qho abrasive lis, piv cov cawv ntawm kev sib tsoo zoo tib yam thiab ultrasonic sib tsoo ntawm cov khoom tshem tawm tus nqi ntawm kev sib tsoo ceev thiab sib txawv pub nqi, thiab tsim cov ultrasonic txiav thickness qauv ntawm ib. ib qho abrasive grain nyob rau hauv qhov kev txiav txim qhia tau hais tias lub ultrasonic vibration yog feem ntau yuav ua rau micro-tawg ntawm cov nplej abrasive, uas yuav tsis tu ncua hloov lub xeev ntawm txiav ntug thiab tuav lub sharpness ntawm lub abrasive nplej txhua lub sij hawm. ZHAO et al. [34] siv tus kheej tsim radial vibration platform (saib daim duab 6) los ua qhov kev ntsuam xyuas ultrasonic vibration-pab sib tsoo ntawm PTMCs, thiab muab piv nrog cov kev sib tsoo zoo tib yam. Piv nrog rau kev sib tsoo zoo tib yam, ultrasonic kev co pab sib tsoo tuaj yeem txo qhov sib tsoo kub los ntawm 24.2 feem pua rau 51.8 feem pua, thiab tib lub sijhawm, cov khoom tshem tawm tuaj yeem nce 2.8 npaug.
duab
Daim duab 6 Radial Vibration Ultrasonic Platform thiab Vibration Measuring Device
BEIJANI et al. [35] siv laser-pab machining (LAM) los ua TiMMCs thawj zaug raws li kev tig ib txwm (saib daim duab 7). Cov txiaj ntsig tau pom tias piv nrog cov pa machining, txawm hais tias qhov chaw roughness tus nqi ntawm lub workpiece nce 15 feem pua, tag nrho cov txiav ntim ntawm cov cuab yeej LAM nce 180 feem pua, thiab cov cuab yeej lub neej tau zoo dua qub, uas yog vim qhov hloov ntawm particles nyob rau hauv lub matrix es tsis tawg.
duab
a) Schematic daim duab
duab
b) Cov khoom siv tiag tiag
Daim duab 7 Laser-pab ua cov cuab yeej kuaj xyuas
04
Additive Manufacturing Processing
Laser additive manufacturing technology tuaj yeem ncaj qha tsim cov qauv txheej txheem, uas qhia tau zoo rau daim ntawv thov kev cia siab hauv kev tsim khoom ntawm TiMMCs. BANERJEE et al. [36] ua tiav TiB / TC4 cov khoom sib xyaw ua ke siv laser stereoforming processing technology (LENSTM), thiab siv cov tshuab luam ntawv electron microscopy thiab xa hluav taws xob microscopy los ua tus yam ntxwv ntawm microstructure ntawm cov khoom sib xyaw ua ke hauv kev nthuav dav. Cov txiaj ntsig tau pom tias txoj kev npaj TiB / TC4 composite microstructure tau ua kom zoo dua qub thiab yog qhov ntsuas kub zoo. Ib yam li ntawd, GU et al. [37] siv cov xim laser melting (SLM) los ua cov txheej txheem npaj TiC / Ti composite hmoov, thiab tau TiC particle-reinforced TiAl3 (theem loj) thiab Ti3AlC2 (theem nrab) matrix composites. Txawm hais tias muaj kev loj hlob me ntsis ntawm cov hmoov nplej, SLM-kho cov khoom sib xyaw tseem muaj qhov zoo microstructure. [38] siv cov khoom siv hluav taws xob ncaj qha (DMD) laser ua tshuab los npaj PTMCs uas muaj cov khoom sib txawv (TiB ntxiv rau TiC) los ntawm hmoov raw cov ntaub ntawv uas muaj pre-alloyed (Ti-6Al-4V plus B4C ) hmoov mix. Cov kev tshawb fawb siv tshuab tau pom tias ntawm 20-600 degree , Vickers hardness ntawm particle-reinforced TiMMCs uas muaj B4C nce 10 feem pua -15 feem pua, thiab cov Young's modulus nce 10 feem pua. Kev npaj ntawm TiMMCs los ntawm DMD laser processing technology yog qhia nyob rau hauv daim duab 8.
duab
Fig.8 Schematic daim duab ntawm TiMMCs npaj los ntawm DMD laser ua tshuab
05
Forging
Forging tuaj yeem tshem tawm qhov tsis xws luag ntawm cov ntaub ntawv thaum lub sijhawm smelting, ua kom zoo dua microstructure, thiab tau txais cov forgings zoo uas phim cov qauv thiab kev ua haujlwm.
Cov kws tshawb fawb txawv teb chaws tau kawm txog cov txiaj ntsig ntawm kub forging ntawm microstructure thiab tensile zog ntawm Ti-TiB matrix composites. Cov kev tshawb fawb tau pom tias chav tsev kub elongation ntawm forged Ti-13.3B thiab Ti-7B cov khoom sib xyaw nce mus txog 6.1 feem pua thiab 5.2 feem pua, raws li, thiab cov khoom siv tau zoo dua qub. Tus kws tshawb fawb hauv tsev Hu Jiarui et al. [39] forged PTMCs ntawm sintered TiC generated nyob rau hauv situ, thiab cov yam ntxwv tsis xws luag ntawm PTMCs tom qab forging raug tshem tawm, dynamic recrystallization tshwm sim, thiab cov neeg kho tshuab zog ntawm chav tsev kub tau txhim kho. Lub tensile fracture SEM morphology ntawm TiC particle reinforced TiMMCs yog qhia nyob rau hauv daim duab 9. Nyob rau tib lub sij hawm, vim kev txhim kho matrix qauv, hnav tsis kam ntawm PTMCs tom qab forging yog txhim kho. ib yam
[40] piv thiab txheeb xyuas cov khoom siv kho tshuab ntawm 5 feem pua (TiB plus TiC)/Ti-1100 cov ntaub ntawv sib xyaw. Nyob rau ntawm 500-650 degree, cov ntaub ntawv pov thawj cov khoom sib xyaw ua ke yog nkig tawg, thiab cov khoom sib xyaw forged yog cov pob txha tawg, thiab lub zog thiab elongation ntawm cov khoom sib xyaw tom qab forging tau nce ntau.
duab
a) Sintering (matrix penetrating cracks) b) Sintering (intergranular cracks thiab grain cracks
duab
c) - forging d) (ntxiv) - forging
Fig.9 Tensile fracture SEM morphology ntawm TiMMCs txhawb nqa los ntawm TiC hais
06
xaus
Vim muaj cov theem txhawb zog, TiMMCs nthuav tawm cov khoom sib txawv thiab cov txheej txheem ua haujlwm los ntawm cov tsoos titanium alloys. Saib tom ntej, kev ua haujlwm ntawm TiMMCs yuav txhim kho hauv cov hauv qab no.
(1) Kev txhim kho thev naus laus zis Cov txheej txheem ua haujlwm ntawm TiMMCs yuav raug txhim kho tas li txhawm rau txhim kho kev tsim khoom thiab cov khoom zoo. Cov cuab yeej txiav tshiab thiab cov txheej txheem ua tiav yuav raug tsim los txo cov kev txiav quab yuam thiab cov cuab yeej hnav, thiab kom paub txog kev sib koom ua ke ntawm TiMMCs heterogeneous Cheebtsam.
(2) Kev sib xyaw ua ke ntawm ntau yam thev naus laus zis TiMMCs muaj qhov tsis zoo ntawm chav tsev kub, thiab kev ua tiav ntawm TiMMCs los ntawm kev siv ntau yam kev ua thermal xws li kub-kub superplastic deformation, kub forging thiab kub extrusion deformation tuaj yeem ua kom tiav daim ntawv thov ntawm TiMMCs hauv ntau yam. teb.
(3) Kev txhim kho cov khoom siv tshiab Nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, TiMMCs tshiab yuav raug tsim los nrog kev ua tau zoo dua thiab kev siv dav dua. Piv txwv li, nano-TiMMCs, multifunctional TiMMCs thiab high-temperature check TiMMCs yuav ntxiv txhawb txoj kev loj hlob ntawm TiMMCs.
(4) Sustainability thiab kev tiv thaiv ib puag ncig Sustainability thiab kev tiv thaiv ib puag ncig yuav dhau los ua qhov tseem ceeb hauv kev txiav txim siab thaum ua TiMMCs. Kev tsim cov txheej txheem ua haujlwm zoo ib puag ncig, kev rov ua dua ntawm cov khoom siv pov tseg thiab kev txo qis ntawm kev siv hluav taws xob yuav yog kev coj ua yav tom ntej.
(5) TiMMC ntau daim ntawv thov yuav raug siv rau hauv ntau qhov chaw. Ntxiv rau cov kev lag luam aerospace thiab tsheb uas twb muaj lawm, kev kho mob, lub zog thiab kev tsim kho kev lag luam tseem yuav tshawb nrhiav cov peev txheej ntawm TiMMCs.
