Ductility vs Brittleness
Ductility thiab brittleness yog ob qho tseem ceeb ntawm lub cev ntawm cov khoom hauv kev tsim kho engineering. Ductility ntawm cov khoom yog nws lub peev xwm deform thaum lub zog tensile siv rau nws. Nws kuj tseem hu ua lub peev xwm ntawm cov khoom siv los tiv thaiv cov yas deformation yam tsis muaj kev tawg. Brittleness, ntawm qhov tod tes, yog ib qho khoom sib txawv ntawm ductility vim nws yog lub peev xwm ntawm cov khoom tawg yam tsis tau ua ntej txhua yam deformation thaum siv quab yuam. Muaj ntau tus neeg uas tsis tuaj yeem nkag siab qhov sib txawv ntawm ductility thiab brittleness thiab tsab xov xwm no yog los piav qhia qhov txawv ntawm ob qho tseem ceeb ntawm cov khoom no.
Peb paub cov khoom ntawm cov khoom siv hauv peb lub neej txhua hnub. Peb hais tias peb cov rau tes yog nkig heev li lawv snap yooj yim. Cov poj niam tshwj xeeb yog pom cuam tshuam los ntawm brittleness ntawm lawv cov rau tes thiab cov plaub hau thiab sim tawm kev kho mob los txhim kho plasticity ntawm lawv cov khoom tseem ceeb. Nyob rau hauv physics, cov ntaub ntawv uas elongate los yog deform mus txog 5% yog hais tias yuav ductile thiab ib co piv txwv ntawm ductile cov ntaub ntawv yog kub, nyiaj, thiab tooj liab. Ntawm qhov tod tes, cov ntaub ntawv nkig muab txoj hauv kev thiab snap yam tsis muaj ntawv ceeb toom thiab tsis muaj qhov deformation. Qee qhov piv txwv zoo yog cam khwb cia hlau thiab pob zeb.
Ib tug tuaj yeem xav txog cov ntaub ntawv ductile li bendable thiab crushable. Koj puas tau pom tias cov hlua roj hmab zoo li cas thaum koj tuaj yeem ncab nws ntev txaus ua ntej nws thaum kawg snaps vim nws tsis tuaj yeem nqa lub zog tensile koj thov? Ntawm qhov tod tes, cov qos yaj ywm chips lossis biscuit uas koj noj yog nkig heev vim nws tsis tuaj yeem tiv taus lub zog me ntsis. Yog li ntawd nws yog ib qho tsim nyog yuav tau hais tias yog tias cov khoom siv tsis yog ductile, nws yog nkig. Hauv kev tsim kho kev lag luam, yog tias peb yuav tsum xaiv ntawm ob cov ntaub ntawv uas muaj tib lub zog thiab lub zog, peb mus rau ib qho uas muaj ductility ntau dua vim nws yuav kav ntev dua. Ductility yog ib yam khoom uas cuam tshuam los ntawm qhov kub thiab txias. Kev nce hauv qhov kub thiab txias yog pom kom nce ductility thiab txo qhov kub thiab txias txo qhov ductility thiab tuaj yeem hloov tau cov khoom los ntawm kev ua rau hauv cov khoom siv nkig.
Impurities kuj yuav ua rau cov khoom nkig. Yog li ntawd, yog hais tias ib tug brittle khoom yog dab tsi yuav tsum tau ntxiv ntawm impurities yog resorted mus rau, ua rau ib tug ntau nkig. Feem ntau ntawm cov iav thiab cov khoom siv ceramic yog nkig heev. Qhov no yog vim li cas cov kws tshawb fawb sim ua kom cov tawv tawv thiab lub zog ntawm cov ntaub ntawv zoo li no los tiv thaiv lawv txoj kev tawg yooj yim. Fracture yog kab tias lub tswv yim tseem ceeb tshaj plaws hauv kev tshawb fawb ntawm cov khoom siv science thiab engineering. Nws txhais tau tias yog lub peev xwm ntawm cov khoom tawg mus rau hauv daim ntawv thaum lub zog sab nraud raug siv rau nws.
In luv:
Qhov txawv ntawm Ductility thiab Brittleness
• Ductility yog lub peev xwm ntawm cov khoom siv los tiv thaiv lub zog tensile thaum nws siv rau nws vim nws dhau los ntawm cov yas deformation
• Brittleness yog qhov sib txawv ntawm ductility raws li nws hais txog lub peev xwm ntawm cov khoom tawg mus rau hauv daim ntawv raws li kev siv lub zog tensile yam tsis muaj elongation lossis yas deformation
• Cov iav thiab ceramics suav hais tias nkig thaum kub thiab nyiaj yog cov khoom siv ductile.
• Ductility tso cai rau cov xaim los kos cov khoom
• Ua kom kub nce ductility thaum ntxiv cov impurities txo ductility
