Kev qaug zog yog hais txog qhov tshwm sim ntawm cov ntaub ntawv maj mam deteriorating thiab nws thiaj li fracturing nyob rau hauv cyclic loading. Rau cov qauv tseem ceeb rau kev nyab xeeb ntawm lub neej, xws li dav hlau cav hniav thiab tsaws iav, kev ua haujlwm qaug zog yog qhov qauv tsim qauv. Qhov tsis tuaj yeem pom qhov tsis tuaj yeem pom nyob rau hauv 3D- cov khoom luam tawm, zoo li huab cua npuas hauv iav, tuaj yeem dhau los ua cov ntsiab lus tawg hauv qab kev ntxhov siab, ua rau cov khoom tsis ua haujlwm ntxov ntxov. Yav dhau los, engineers feem ntau siv kub isostatic nias (HIP) los tshem tawm cov pores. Txawm li cas los xij, txoj kev no yog ob -edged ntaj: thaum kho qhov pores, nws kuj coarsens lub cim, zoo microstructures tsim los ntawm 3D luam ntawv, negating nws muaj peev xwm zoo. Nws yog ib rooj plaub classic ntawm "tshem tus menyuam tawm nrog da dej."
Nws puas tuaj yeem tshem tawm qhov pores thaum khaws cia cov microstructure zoo heev ntawm 3D luam ntawv? Pab neeg tshawb fawb tau tshawb pom qhov "asynchronous" xwm ntawm theem kev hloov pauv thiab kev loj hlob hauv 3D- luam tawm titanium alloys, thiab raws li qhov no, tsim ib qho tshiab "flawless additive manufacturing process." Lub hauv paus ntawm cov thev naus laus zis no yog nyob rau hauv kev tswj xyuas lub voj voog thermal ntawm kev tshaj tawm - ua: ua ntej cov nplej muaj sij hawm loj hlob, cov theem kev hloov pauv sai sai thiab cov khoom siv txias, yog li "xauv hauv" qhov zoo, zoo li microstructure tsim los ntawm 3D luam ntawv.
Cov txiaj ntsig tau zoo siab: "tsis muaj qhov tsis txaus ntseeg" titanium alloy kho nrog NAMP thev naus laus zis tshem tawm cov voids tsis txaus ntshai nyob hauv nws cov qauv, thaum ua kom zoo kawg nkaus khaws cov khoom zoo thiab cov qauv lamellar.
Peak Performance: Lub neej qaug zog tshaj txhua yam paub txog Titanium Alloys. Txawm tias qhov zoo tshaj plaws yog cov txiaj ntsig ntawm cov cuab yeej siv tshuab. Qhov no "tsis muaj qhov tsis zoo" titanium alloy ua tiav qhov kev qaug zog ntawm kwv yees li 978 MPa, kev txhim kho 106% dhau ntawm cov ntawv luam tawm qub. Tshwj xeeb tshaj yog, daim duab no tsis tsuas yog nyob deb tshaj tag nrho cov paub 3D- luam titanium alloys tab sis kuj tseem ceeb tshaj titanium alloys uas tsim los ntawm cov txheej txheem forging ib txwm, mus txog qhov kawg ntawm kev qaug zog rau cov ntaub ntawv zoo sib xws. Thaum cov kws tshawb fawb piv cov kev qaug zog tshwj xeeb (qhov piv ntawm kev qaug zog rau qhov ntom ntom, qhov tseem ceeb rau kev lag luam aerospace) nrog ntau yam khoom siv engineering, lawv pom tias cov ntawv luam tawm tsis zoo no tau nyob rau sab xis saum toj ntawm daim ntawv, tshaj tag nrho cov hlau, aluminium alloys, magnesium alloys, siab -kub alloys, thiab txawm tias muaj peev xwm siab tshaj-cov hlau alloys, thiab txawm tias muaj peev xwm loj heev ntawm 3D luam ntawv thev naus laus zis hauv kev tsim kev qaug zog-cov khoom tiv thaiv.
Vim li cas 3D- luam tawm microstructures, tsis muaj voids, muaj zog?
Kev tshawb fawb qhia tau hais tias qhov tshwj xeeb ultra- zoo lamellar qauv ntawm 3D luam ntawv tau zoo inhibits qhov chaw ntawm kev qaug zog puas tsuaj. Nyob rau hauv cov tsoos titanium alloys, qaug zog tawg feem ntau pib nyob rau hauv coarse grains los yog mos theem cheeb tsam, thaum lub zoo qauv ntawm 3D luam ntawv uniformly disperses kev nyuaj siab, ua rau tawg pib thiab propagation nyuaj.
Yav Tom Ntej Outlook: Rehabilitating 3D Printing thiab qhib cov lus qhia tshiab. Qhov kev tshawb fawb no cuam tshuam tag nrho peb cov kev nkag siab ntawm kev qaug zog ntawm 3D- cov ntaub ntawv luam tawm. Nws eloquently qhia tau hais tias 3D- luam tawm microstructure nws tus kheej tsis yog qhov tsis muaj zog, tab sis yog lub hauv paus tseem ceeb rau kev ua tiav kev qaug zog zoo dua. Lub bottleneck tiag tiag nyob rau hauv qhov tsis xws luag qhia los ntawm cov txheej txheem luam ntawv. Qhov kev ua haujlwm no taw qhia rau txoj hauv kev ua kom zoo dua qub rau kev txhim kho 3D tshuab luam ntawv: ntawm ib sab, txuas ntxiv txhim kho cov txheej txheem luam ntawv kom txo cov voids; ntawm qhov tod tes, nquag tsim cov ncej tshiab- ua cov thev naus laus zis los tswj cov microstructure kom zoo. Qhov tseem ceeb tshaj, lub tswv yim ntawm "flawless printing" no muaj peev xwm txuas mus rau lwm cov khoom siv hlau, ua 3D tshuab luam ntawv mus rau hauv lub ntiaj teb loj ntawm kev ua tau zoo ntawm kev tsim khoom.
Cov ntaub ntawv ntawv:
Title: Kev qaug zog ua haujlwm siab hauv titanium alloy ntawm ze -void- dawb 3D luam ntawv
Phau ntawv: Xwm, 2024-02-28
Sau tsab xov xwm no
Qu, Z., Zhang, Z., Liu, R. et al. Kev qaug zog siab nyob rau hauv titanium alloy ntawm ze -void- dawb 3D luam ntawv. Xwm 626, 999–1004 (2024).
https://doi.org/10.1038/s41586-024-07048-1