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## Numerical modelling of welding of martensitic steel

Smoljan, Božo; Iljkić, Dario; Smokvina Hanza, Sunčana; Štic, Lovro; Jokić, Milenko
Numerical modelling of welding of martensitic steel // 12th International Seminar “Numerical Analysis of Weldability”
Graz - Seggau, Austria, 2018. str. - (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)

Naslov
Numerical modelling of welding of martensitic steel

Autori
Smoljan, Božo ; Iljkić, Dario ; Smokvina Hanza, Sunčana ; Štic, Lovro ; Jokić, Milenko

Skup
12th International Seminar “Numerical Analysis of Weldability”

Mjesto i datum
Graz - Seggau, Austria, 23-26.09.2018.

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Mathematical modelling ; computer simulation ; welded joint ; hardness distribution ; microstructure composition

Sažetak
The mathematical model and computer simulation for prediction of mechanical properties and microstructure composition of steel welded joint was developed. Because of wide range of applicability and ease of use of finite volume method (FVM), this numerical method was suitable to create integrated computer program for simulation of transient temperature field, microstructure transformation and mechanical properties during welding of steel. The computer simulation of mechanical properties and microstructure of welded joint is consisted of numerical calculation of transient temperature field in process of cooling, and of numerical calculation of hardness. The computer simulation of hardness of welded joint is based on both, CCT diagrams and the thermo-kinetic expressions using linear alignment with the actual chemical composition. Microstructure and hardness of welded joint has been predicted based on calculated characteristic time of cooling from 800 °C to 500 °C, (t8/5). Results of steel welding were estimated by taking into account the process of reheating of workpiece during the welding. The established procedure was applied in computer simulation of martensitic steel welded joint.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Temeljne tehničke znanosti