Mechanical Properties ntawm TC11 Titanium Alloy Forgings
Mechanical Properties ntawm TC11 Titanium Alloy Forgings
Qhov cuam tshuam ntawm Microstructure ntawm Mechanical Properties ntawm TC11 Titanium Alloy Forgings
TC11 titanium alloy belongs rau martensitic plus hom tshav kub-lub zog titanium alloy, thiab nws nominal muaj pes tsawg leeg yog Ti-6.5Al-3.5Mo-1.5Zr-0.3Si. Nws muaj lub zog siab, zoo nruab nrab kub ua haujlwm, zoo corrosion kuj thiab qaug zog kuj. Nws muaj qhov zoo ntawm lub zog siab thiab tuaj yeem ua kom muaj zog los ntawm kev kho cua sov. Nws yog cov khoom siv tseem ceeb rau kev tsim cov tshuab aero-engines, high-pressure compressor discs thiab cov hniav, thiab tseem siv los tsim cov khoom tseem ceeb ntawm cov kabmob ntawm lub dav hlau. Cov qauv sab hauv ntawm cov hlau txiav txim siab nws qhov kev ua tau zoo kawg, thiab kev sib xyaw tsim nyog ntawm cov qauv thiab morphology tuaj yeem txhim kho cov khoom siv kho tshuab zoo heev. Nyob rau hauv daim ntawv no, sib txawv fiber ntau microstructures tau los ntawm kev tsim txawv thermal ua thiab kev kho cua sov txheej txheem, thiab cov nyhuv ntawm microstructure nyob rau hauv lub chav tsev kub tensile zog ntawm TC11 forgings tau kawm thiab soj ntsuam.
1. Cov ntaub ntawv xeem thiab cov txheej txheem
Cov khoom siv hauv kev sim yog TC11 titanium alloy bar, thiab qhov hloov pauv yog 1005 degree -1010 degree . Cov khoom siv raw siv hauv kev sim yog npaj los ntawm kev sib txawv thermal ua lossis kev kho cua sov kom tau txais cov qauv sib txawv. Nws qhia tau hais tias tus neeg sawv cev corrosive siv hauv cov qauv metallographic yog 10 feem pua HF ntxiv rau 30 feem pua HNO3 ntxiv rau 70 feem pua H2O. Thiab siv Image-ProPlus software kom muaj nuj nqis ntawm cov ntsiab lus ntawm thawj theem: tom qab ntawd sim cov khoom tensile ntawm chav tsev kub. Qhov kev ntsuam xyuas tau ua tiav ntawm 1185 hom khoom kuaj tshuab.
2. Cov qhabnias xeem thiab kev sib tham
2.1 Kev cuam tshuam ntawm cov khoom siv kho tshuab ntawm TC11
Daim duab 1qhia cov annealed microstructure ntawm TC11 nrog sib txawv equiaxed txheem. Thawj theem cov ntsiab lus tau ua kom muaj nuj nqis los ntawm Image-ProPlus software. Cov ntsiab lus theem equiaxed yog 44 feem pua, 39 feem pua, 32 feem pua, thiab 40 feem pua. Nws tuaj yeem pom los ntawm daim duab 1 tias cov ntsiab lus ntawm H1, H2 thiab H3 thawj theem qhia txog kev txo qis; Cov ntsiab lus ntawm H4 equiaxed theem yog kwv yees tib yam li ntawm H2, tab sis nws qhov loj me thiab kev faib tawm txawv. Cov nplej loj hauv cov qauv H2 yog qhov sib xws, thaum cov qauv H4 muaj qhov pom tseeb "ob chav qauv", thiab muaj ob theem loj ntawm cov nplej equiaxed.
Daim duab 2qhia txog kev sib raug zoo ntawm lub tsev cog khoom tensile zog thiab equiaxed theem cov ntsiab lus ntawm peb TC11 titanium forgings H1, H2, thiab H3. Nws tuaj yeem pom los ntawm daim duab 2 tias nrog kev nce qib ntawm cov ntsiab lus equiaxed, lub zog ntawm cov khoom txo qis thiab cov plasticity nce me ntsis. Qhov no yog vim hais tias nrog kev nce ntawm equiaxed theem cov ntsiab lus nyob rau hauv cov khoom, cov ntsiab lus ntawm -transformant txo, ua rau ib tug txo nyob rau hauv cov ntsiab lus ntawm lub / theem interface, uas tsis muaj zog pinning nyhuv ntawm dislocations, txo lub zog ntawm cov khoom, thiab txhim kho cov plasticity ntawm cov khoom. ; Tsis tas li ntawd, nrog rau qhov nce ntawm cov ntsiab lus theem equiaxed, qhov kev faib tawm ntawm cov ntsiab lus alloying nyob rau hauv cov ntaub ntawv intensifies, uas txhais tau hais tias cov ntsiab lus Al ntawm daim ntawv nyob rau hauv lub-transformer txo nyob rau hauv lub sij hawm no, ua rau ib tug txo nyob rau hauv lub zog ntawm cov ntaub ntawv. -transformer, uas nyob rau hauv lem ua rau ib tug nce nyob rau hauv tag nrho lub zog. txo qis, thaum txij li lub plasticity ntawm cov khoom tsis cuam tshuam los ntawm kev coj tus cwj pwm, nws tsuas yog nyob ntawm qhov loj ntawm -clusters. Yog li ntawd, cov nyhuv ntawm alloying ntsiab faib ntawm plasticity yog tsawg heev; Thaum kawg, nrog qhov nce ntawm cov ntsiab lus equiaxed theem, qhov deformation compatibility ntawm cov khoom nce, uas ua rau me ntsis nce hauv plasticity. Qhov sib xyaw ua ke ntawm peb qhov no ua rau txo qis hauv lub zog ntawm cov khoom thiab me ntsis nce hauv plasticity nrog kev nce hauv cov ntsiab lus equiaxed theem.
Rooj 1qhia qhov sib piv ntawm chav tsev kub tensile zog ntawm H2 thiab H4. Nws tuaj yeem pom los ntawm Table 1 tias lub zog tawm los thiab elongation ntawm H4 qauv yog qhov zoo dua li cov H2, thiab lub zog tensile thiab thaj tsam shrinkage yog qhov zoo ib yam. Nws tuaj yeem pom los ntawm kev tshuaj xyuas microstructure tias qhov nruab nrab ntawm cov nplej loj ntawm H4 qauv yog me dua li ntawm H2 qauv. Raws li cov qauv Hall-Petch: nws tuaj yeem pom tau tias qhov me me ntawm qhov nruab nrab ntawm cov nplej loj, qhov siab dua qhov muaj zog ntawm cov khoom siv. Qhov no yog vim hais tias tus naj npawb ntawm grain ciam teb nce nyob rau lub sij hawm no, ua rau ib tug nce nyob rau hauv qhov kev tiv thaiv ntawm dislocation zog, uas ua rau kom lub deformation kuj ntawm cov hlau; Ntawm qhov tod tes, qhov txo qis ntawm qhov nruab nrab ntawm cov nplej loj txhais tau hais tias cov nplej ntau zuj zus, ua rau cov yas deformation ntawm cov khoom tuaj yeem tawg mus rau hauv ntau cov nplej, kom cov deformation kev sib koom ua ke ntawm cov khoom nce, uas ua rau muaj kev nce ntxiv hauv cov nplej. elongation.
2.2 Cov nyhuv ntawm cov lamella theem nrab ntawm cov khoom siv kho tshuab ntawm TC11
Nyob rau hauv daim duab 3, H5 thiab H6 yog cov microstructures tom qab txias los ntawm cov xov xwm txias sib txawv ntawm tib lub annealing kub. Tus cwj pwm kom muaj nuj nqis ntawm cov ntsiab lus theem pib los ntawm Image-ProPlus software qhia tau hais tias cov ntsiab lus theem yog tib yam, txog 30 feem pua, thiab tus thawj tswj loj yog li 14.8um. Nws tuaj yeem pom los ntawm daim duab 3 tias cov qauv H5 thiab H6 muaj qhov pom tseeb-theem morphology nyob rau theem nrab lamellae. Cov theem ntawm cov lamellae theem nrab nyob rau hauv cov qauv H5 yog luv luv-zoo li tus, nrog ib tug me me nam piv; Qhov thib ob lamellae nyob rau hauv tus qauv H6 yog zoo koob-zoo li tus, thiab nam piv yog siab dua li ntawm cov qauv H5.
Table 2 qhia qhov sib piv ntawm chav tsev kub tensile zog ntawm H6 thiab H5. Nws tuaj yeem pom los ntawm Table 2 tias lub zog ntawm H6 qauv yog qhov zoo dua li ntawm H5 qauv, tab sis nws qhov elongation thiab thaj tsam shrinkage yog me ntsis txo.
Nyob rau hauv cov ntaub ntawv ntawm ib tug tej yam ntsiab lus, qhov kev faib ua feem ntawm -transformer kuj yog tsau raws li. Geometrically hais lus, tus kheej kheej qhov chaw yog qhov tsawg tshaj plaws rau tib lub ntim. Raws li -daim ntawv hauv lub -transformer yog ntau detached los ntawm cov equiaxed zoo, uas yog, qhov loj dua qhov nam piv, qhov siab dua qhov chaw ntawm qhov chaw sib piv, thiab qhov loj dua theem interface. Cov nyhuv pinning ntawm theem sib cuam tshuam ntawm kev cuam tshuam txwv tsis pub muaj kev cuam tshuam ntawm cov khoom hauv cov nplej, ua rau muaj kev nce ntxiv ntawm kev tsis sib haum xeeb thaum lawv txav mus, uas ua rau cov hlau deformation ua rau muaj zog, yog li ua kom lub zog ntawm cov khoom thiab txo nws cov khoom. yas.
3. Cov lus xaus
(1) Nrog rau kev nce qib ntawm cov ntsiab lus, lub zog ntawm cov khoom txo qis thiab cov yas nce me ntsis; qhov txo qis ntawm qhov nruab nrab ntawm cov nplej loj ntawm cov theem equiaxed yog qhov zoo los txhim kho cov khoom muaj zog plasticity.
(2) Nrog rau qhov nce ntawm qhov sib piv ntawm theem ntawm cov lamellae theem nrab, lub zog ntawm cov khoom nce thiab cov plasticity txo.
