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AUTOMATED QUANTIFICATION OF GRAIN SIZE AND PHASE
RATIO IN DUPLEX STEEL MICROSTRUCTURES USING OPENCV
Samanda o Ilxomjon Rasulo ich
Texnika anla i nomzodi (PhD) Olmaliq da la exnika uni e si e i
Me allu giya a kimyo iy exnologiyala akul e i
Ma ema ika a abiiy anla ka ed asi
samada o [email protected]
Ka imo Sa do Yashino ich
Texnika anla i nomzodi (PhD) Olmaliq da la exnika uni e si e i
Me allu giya a kimyo iy exnologiyala akul e i
Ma ema ika a abiiy anla ka ed asi
samada o [email protected]
The mic os uc u al e alua ion o duplex s ainless s eels plays a c ucial ole in
de e mining hei s eng h, oughness, and co osion esis ance. Con en ional
manual measu emen o g ain size, e i e–aus eni e phase balance, and hea -
a ec ed zone (HAZ) wid h is labo -in ensi e and s ongly dependen on ope a o
pe cep ion, which o en leads o inconsis ency in esul s. In his wo k, an
au oma ed compu e ‐ ision‐based me hodology is p oposed o as and
ep oducible quan i a i e me allog aphic analysis using he OpenCV lib a y.
The de eloped wo k low includes image no maliza ion, g ayscale con e sion,
his og am equaliza ion, adap i e h esholding, and mo phological e inemen o
isola e e i e and aus eni e egions. G ain bounda y ex ac ion is pe o med using
Sobel and Canny ope a o s, ollowed by wa e shed segmen a ion o accu a ely
sepa a e adjacen g ains. Pixel measu emen s a e calib a ed o mic ome e s based
on he scale ba p esen in he mic oscopic images, enabling p ecise dimensional
quan i ica ion.
The algo i hm was es ed on e ched duplex s eel mic og aphs acqui ed unde
op ical mic oscopy. The au oma ed esul s show less han 5% de ia ion om
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manual ASTM‐based measu emen s o g ain size and phase a io, demons a ing
s ong eliabili y. In addi ion, he p oposed pipeline signi ican ly educes analysis
ime and ope a o subjec i i y, making i sui able o ou ine me allog aphic
examina ion in bo h esea ch and indus ial labo a o ies.
This s udy shows ha open‐sou ce compu e ision echniques p o ide an
e ec i e al e na i e o adi ional me allog aphic measu emen s. Fu u e
imp o emen s may include he in eg a ion o machine-lea ning-based phase
classi ie s o handle complex mul i-phase mic os uc u es.
FOYDALANILGAN ADABIYOTLAR
1. ASTM E112-13. S anda d Tes Me hods o De e mining A e age
G ain Size. ASTM In e na ional, 2013.
2. Wes , A., Wessman, S. “Quan i ica ion o Fe i e–Aus eni e Balance
in Duplex S ainless S eels.” Ma e ials Cha ac e iza ion, 2022.
3. Samanda o , I.R., Ka imo , S.Y. Автоматизированный анализ
толщины слоя и фазового состава микроструктуры упрочнённого чугуна,
полученного методом Los Foam Cas ing. Uni e sum: технические науки
9(138) (2025). h ps://7uni e sum.com/ u/ ech/a chi e/i em/20736
