Numerical study of the effect of inclusions on the residual stress distribution in high-strength martensitic steels during cooling
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2019-02-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
13
Series
Applied Sciences (Switzerland), Volume 9, issue 3
Abstract
In high-strength martensitic steels, the inclusions significantly affect the material performance especially in terms of fatigue properties. In this study, a numerical procedure to investigate the effect of the inclusions types and shapes on the residual stresses during the cooling process of the martensitic steels is applied systematically based on the scanning electronic microscopy (SEM) and energy dispersive spectrometer (EDS) results of different types of inclusions. The results show that the maximum residual stress around the interface between Mg-Al-O inclusion and the matrix is the largest, followed by TiN, Al-Ca-O-S, and MnS when the inclusions are assumed as perfect spheres for simplicity. However, these results are proved to be 28.0 to 48.0% inaccurate compared to the results considering actual shapes of inclusions. Furthermore, the convex shape of inclusion will lead to stress concentration in the matrix while the concave shape of inclusion will lead to stress concentration in the inclusion. The residual stress increases with the increase of inclusion edge angle. The increase rate is the largest for TiN inclusions on the concave angle, which leads to extreme stress concentration inside TiN inclusion.Description
Keywords
Abaqus, Inclusion, Martensitic high strength steel, Residual stress, MECHANISM, THERMAL-EXPANSION, CRACK INITIATION, FAILURE, DAMAGE, HIGH-CYCLE FATIGUE, inclusion, residual stress, FRACTURE, martensitic high strength steel, BEARING STEEL, GROWTH-BEHAVIOR, LIFE
Other note
Citation
Gu, C, Lian, J, Bao, Y, Xiao, W & Münstermann, S 2019, ' Numerical study of the effect of inclusions on the residual stress distribution in high-strength martensitic steels during cooling ', Applied Sciences (Switzerland), vol. 9, no. 3, 455 . https://doi.org/10.3390/app9030455