Residual stress yog ib qho kev ntxhov siab tsis ruaj khov uas muaj nyob hauv titanium alloy cov ntaub ntawv thiab cov khoom siv tom qab vuam lossis kev ua tshuab. Thaum cov khoom raug rau sab nraud quab yuam, cov kev ntxhov siab thov cuam tshuam nrog cov kev ntxhov siab seem, ua rau cov yas deformation ntawm qee qhov chaw hauv zos thiab rov faib cov kev ntxhov siab sab hauv. Thaum lub zog sab nraud raug tshem tawm, tag nrho cov khoom raug deformation. Residual kev ntxhov siab cuam tshuam rau lub zog qaug zog, lub zog zoo li qub, thiab kev tiv thaiv corrosion ntawm cov khoom ua haujlwm, ua rau kev tsim khoom xws li deformation thiab tawg, thiab yog li txo qhov kev pab cuam lub neej ntawm cov khoom. Tsis tas li ntawd, residual stress yog ib qho tseem ceeb uas cuam tshuam rau qhov seem stability ntawm qhov chaw.
Tam sim no, cov txheej txheem ib txwm siv los ntsuas qhov kev ntxhov siab nyob hauv qhov seem tuaj yeem muab faib ua cov txheej txheem ntsuas kev tso tawm thiab tsis yog -txoj kev ntsuas kev puas tsuaj. Kev ntsuas kev tso tawm cov txheej txheem suav nrog kev sib cais lossis txiav tawm cov khoom siv nrog cov kev ntxhov siab seem ntawm cov txheej txheem kom tso tawm qhov kev ntxhov siab, thiab tom qab ntawd ntsuas cov kev hloov pauv los txiav txim siab qhov seem seem. Txawm hais tias txoj kev no ua rau qee yam kev puas tsuaj lossis kev puas tsuaj rau lub workpiece, nws muaj qhov ntsuas qhov tseeb, qhov zoo-tsim txoj kev xav, thiab cov cuab yeej paub tab, thiab tseem siv dav. Nws feem ntau suav nrog txoj kev drilling, lub nplhaib tseem ceeb txoj kev, thiab segmented txiav txoj kev, ntawm cov uas qhov ntiav qhov muag tsis pom txoj kev ua rau kev puas tsuaj tsawg tshaj plaws. Tsis yog-txoj kev ntsuas kev puas tsuaj, tseem hu ua txoj kev kuaj lub cev, suav nrog X- txoj kab hluav taws xob, X- txoj kab hluav taws xob diffraction, txoj kev neutron diffraction, scanning electron acoustic microscopy method, electronic speckle pattern interferometry method, ultrasonic method, thiab magnetic method, etc. Cov qauv no tsis ua rau cov khoom siv kim heev. Ntawm lawv, X- txoj kab hluav taws xob thiab txoj kev ultrasonic yog qhov paub tab. Txoj kev X-ray txoj kev yog qhov tseeb thiab txhim khu kev qha, thiab tuaj yeem rov ua dua ntawm qhov ntsuas qhov qub. Nws yog qhov ua tau zoo tshaj plaws thaum qhov kev ntxhov siab hloov pauv hauv ib qho me me. Ultrasonic ntsuas kev ntxhov siab yog ua raws li kev xav ntawm acoustoelasticity thiab siv qhov tshwm sim ntawm acoustic birefringence hauv cov ntaub ntawv nyuaj. Thaum tsis muaj kev ntxhov siab, lub ultrasonic yoj propagation ceev nyob rau hauv lub isotropic elastic lub cev yog txawv los ntawm qhov uas nyob rau hauv kev ntxhov siab. Kev sib raug zoo ntawm ultrasonic yoj ceev thiab kev ntxhov siab yog siv los ntsuas qhov kev ntxhov siab seem.
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