Qhov sib txawv tseem ceeb ntawm kev txav mus los thiab kev nkag mus yog qhov kev txav txav deb yog qhov txav ntawm kev txav mus los ntawm cov qauv siv lead ua ntawm cov khoom siv, whereas diffusion creep yog diffusion ntawm vacancy los ntawm siv lead ua lattice tshwm sim.
Ib deformation hauv lub cev chemistry hais txog kev hloov pauv txuas ntxiv ntawm lub cev los ntawm cov qauv siv rau cov qauv tam sim no.
Dislocation Creep yog dab tsi?
Dislocation creep yog ib hom deformation mechanism nyob rau hauv cov ntaub ntawv crystalline uas muaj kev txav ntawm dislocations los ntawm cov siv lead ua lattice ntawm cov khoom. Qhov no yog lub mechanism opposite ntawm diffusion creep. Lub dislocation creep ua rau cov yas deformation ntawm tus kheej muaju, yog li, cov khoom nws tus kheej.
Hom deformation no yog qhov nkag siab zoo rau qhov sib txawv ntawm cov khoom siv. Piv txwv li, ntawm qhov kub thiab txias heev, dislocation creep yog qhov tseem ceeb deformation mechanism nyob rau hauv feem ntau cov ntaub ntawv crystalline.
Daim duab 01: Ib Ntug Dislocation Creep hauv daim duab
Dislocation creep nyob rau hauv cov muaju tshwm sim vim qhov kev txav ntawm dislocations thoob plaws hauv cov siv lead ua lattice. Thaum lub dislocation yog txav los ntawm cov siv lead ua, ib feem ntawm cov siv lead ua zoo li hloov los ntawm ib tug lattice taw tes raws ib tug dav hlau (uas tshwm sim txheeb ze rau tag nrho cov siv lead ua). Lub dav hlau uas cov cheeb tsam hloov pauv thiab tsis hloov pauv tau sib cais yog hu ua lub dav hlau plam. Txhawm rau tso cai rau qhov kev txav no, tag nrho cov tshuaj ionic bonds raws lub dav hlau plam yuav tsum tau tawg ib zaug. Tsis tas li ntawd, qhov kev sib koom ua ke no yuav tsum muaj zog ntau, hauv txoj kev xav, ua kom nws muaj peev xwm los ua qhov chaw tawg. Piv txwv tias qhov kev txav mus los ua ib kauj ruam zuj zus, qhov kev sib tsoo yog tam sim ntawd ua raws li daim ntawv cog lus tshiab tsim ntawm qib qis zog.
Vim qhov kev txav ntawm qhov kev txav mus los ntawm kev siv lead ua lattice, nws muaj peev xwm tsim cov kab lattice defect ntawm qhov chaw ntawm cov iav siv lead ua. Muaj ob hom dislocation creeps hu ua ntug thiab ntsia hlau dislocations. Nyob rau hauv ib tug ntug dislocation creep, ntug ntawm ib tug ntxiv txheej ntawm atoms nyob rau hauv cov ntaub ntawv siv lead ua lattice. Nyob rau hauv cov ntsia hlau dislocation creep, nws tsim ib txoj kab uas cov siv lead ua lattice jumps ib tug lattice point.
Diffusion Creep yog dab tsi?
Diffusion creep yog ib hom deformation mechanism nyob rau hauv cov ntaub ntawv crystalline qhov twg qhov diffusion ntawm vacancy los ntawm siv lead ua lattice tshwm sim. Cov txheej txheem deformation no ua rau cov yas deformation ntau dua li qhov tsis ua haujlwm ntawm cov khoom siv.
Hom deformation no yog qhov sib piv rau qhov kub thiab txias dua li lwm hom deformations uas tshwm sim hauv cov iav siv lead ua. Diffusion creep feem ntau tshwm sim ntawm qhov kub siab homologous. Tsis tas li ntawd, diffusion creep ua rau kev tsiv teb tsaws ntawm crystalline defects los ntawm cov siv lead ua lattice nyob rau hauv ib txoj kev uas thaum ib tug siv lead ua yog undergoing ib tug ntau dua ntawm compression nyob rau hauv ib qho kev taw qhia piv rau lwm txoj kev. Nyob ntawd, kev tsiv teb tsaws ntawm qhov tsis xws luag tshwm sim ntawm lub ntsej muag siv lead ua raws li kev taw qhia ntawm compression. Qhov no ua rau kev hloov pauv loj loj uas ua rau luv luv ntawm cov siv lead ua hauv qhov kev taw qhia qhov chaw siab tshaj plaws compression.
Feem ntau, cov muaju tsis zoo tag nrho ntawm microscale. Qhov no yog vim qee qhov chaw ntawm atoms nyob rau hauv cov iav siv lead ua no tau nyob los ntawm qhov tsis xws luag, hais lus lossis qhov chaw ua haujlwm. Cov chaw ua haujlwm no tuaj yeem suav tias yog hom tshuaj lom neeg uas tuaj yeem kho tau siv heterogeneous theem equilibria. Hauv qhov tshwm sim no, tus naj npawb ntawm cov neeg ua haujlwm raug cuam tshuam los ntawm tus lej ntawm cov tshuaj tsis huv hauv cov siv lead ua. Cov chaw ua haujlwm no tuaj yeem txav mus los ntawm cov qauv siv lead ua vim "dhia" ntawm cov khoom nyob sib ze.
Qhov txawv ntawm Dislocation Creep thiab Diffusion Creep yog dab tsi?
Ib deformation nyob rau hauv lub cev chemistry yog hais txog kev hloov kho txuas ntxiv ntawm lub cev los ntawm cov qauv siv rau cov qauv tam sim no. Qhov sib txawv tseem ceeb ntawm dislocation creep thiab diffusion creep yog qhov dislocation creep yog qhov txav ntawm dislocations los ntawm cov qauv siv lead ua ntawm cov khoom whereas diffusion creep yog diffusion ntawm vacancies los ntawm siv lead ua lattice tshwm sim.
Cov hauv qab no infographic tabulates qhov sib txawv ntawm dislocation creep thiab diffusion creep rau ib sab ntawm kev sib piv.
Summary – Dislocation Creep vs Diffusion Creep
Dislocation creep thiab diffusion creep yog ob hom deformation mechanisms hauv siv lead ua lattices. Qhov sib txawv tseem ceeb ntawm dislocation creep thiab diffusion creep yog qhov dislocation creep yog qhov txav ntawm dislocations los ntawm cov qauv siv lead ua ntawm cov khoom, whereas diffusion creep yog diffusion ntawm vacancies los ntawm siv lead ua lattice tshwm sim.
