Beta titanium alloy muaj cov feem ntau ntawm beta stabilizing cov ntsiab, uas tsis muaj zog elastic bondulus (uas tuaj yeem tsawg li 45 GPA). Cov xeeb ceem no ua rau beta titanium alloy tshwj xeeb txaus nyiam rau biomedical kev cog lus thov. Cov ntsiab no tseem tuaj yeem khaws cia kom lub siab- qhov kub beta theem thaum txias sai (xws li dej txias) mus rau chav sov. Kev laus dhau los kho mob tuaj yeem ua ntej peves me me (thiab lwm yam metastable theem) hauv Beta theem matrix, yog li muab cov nyhuv muaj zog. Qhov kawg tensile lub zog ntawm cov beta titanium alloys tuaj yeem yog qhov tshwj xeeb ntawm cov khoom lag luam ntawm lub tsev kawm ntawv Alpha Piv txwv li, ti {- 5al-2zr-4ZR-4ZR-4ZR-4ZR-4ZR-4ZR-4ZR-4ZR-4ZR-4LA thiab feem ntau yog siv lub zog ntxuam disk hauv cov cav dav hlau.
Nyob rau hauv sib piv, chav tsev kub tawm lub zog txias thiab hnub nyoog} {} TI-6AL-2SN-4ZR-4ZR-6MO (Ti-6246), Ti-5F-5F-5F-5FE-5F-5VO-5V-5V-5ZR (Ti-55531), Ti-5V-5V-5MO-5Co-5CR (Ti-5553 thiab Alloy-8V-6LO-4ZR (Beta-C). Lub zog tensile kawg (UTS) ntawm yuav luag txhua tus tsim khoom lag luam beta titanium alloys hauv lawv li kev coj ua zoo tshaj plaws ntawm ntau dua los yog sib npaug rau 15%.
Kev kho cua sov tom qab kev tsim khoom ntau ntxiv tuaj yeem hloov lub zog tensile (tshwj xeeb yog {{{} titanium alloys. Txawm hais tias yog qhov kev kho kom haum rau sab saud, thiab lub zog ua ke ua ke, thiab lub zog muaj zog tshaj plaws ntawm kev tsim khoom TI-6AL-4V alloy.
Lub Laser Qhia Lub Zog ... - ded) ti 552 megapasts thiab tag nrho elongation ntawm 5.9%. Laser hmoov melting (l - pbf) beta-c alloy muaj peev xwm qhia tau ntau dua rau kev tsim khoom ntxiv ntawm titanium alloys.
Txawm li cas los xij, kev daws teeb meem + kev laus thiab ncaj qha kev kho mob feem ntau ua rau muaj cov xim yas: piv txwv li kev siv kev laus + kev laus yog tsawg dua 2%. Txog rau qhov kawg no, cov kws tshawb nrhiav tau tsim muaj cov nqi triple (cov kev daws teeb meem hauv theem thiab cov laus}}} paab Kev tshawb fawb ntawm l - pbf Ti-55511 thiab L-PBF TI-17 tau pom tias nce qib siab ua ntej muaj kwv yees li 8% ntawm 650 theem kev laus). Tsis tas li ntawd, l-ded ti-555511 tuaj yeem tau txais UTS ntawm kwv yees li 11% tom qab kev kho mob beta li ntawm 900℃thiab cua txias txias, ua kom txias.
For alloys with low content of beta stabilizing elements (such as Ti-6Al-2Sn-4Zr-6Mo), annealing at 600-900 ℃ is usually carried out to promote the decomposition of alpha martensite into alpha and beta phases, thereby achieving high yield strength (from about 450 megapascals to about 1050 megapascals) while maintaining good plasticity (>15%).
Thov cov lus hais
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