A4 Conference proceedings

Effect of GMAW Heat Input on the Microstructure and Mechanical and Fatigue Behavior of Dissimilar Welds of Ultrahigh Strength Steel and Duplex Stainless Steel


Publication Details
Authors: Kashani Hamed Tasalloti, Dabiri Mohammad, Kah Paul, Martikainen Jukka
Publication year: 2017
Language: English
Title of parent publication: ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering : Volume 4: Materials Technology
Volume number: 4
Start page: 1
End page: 14
Number of pages: 14
ISBN: 978-0-7918-5768-7
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication

Abstract

The
effect of heat input on the microstructure and mechanical properties of
dissimilar welds of direct-quenched ultrahigh strength steel (Optim 960
QC) and duplex stainless steel (UNS S32205) was studied. The effect of
heat input on grain coarsening and the proportion of bainite-martensite
on the ferritic side and ferrite-austenite on the duplex side was
clearly evident. The hardness profile showed a trend of increasing
hardness with lower heat input. Enhancement in tensile strength
corresponded to lower heat input and increase in hardness. The
elongation values and bend behavior were roughly the same for all the
specimens; there was no clear link to the heat input. Moderate heat
input gave optimum impact toughness in the weld and the ferritic HAZ.
The fatigue performance of the specimens demonstrated the profound
influence of geometrical effects. However, the effect of microstructural
characteristics on fracture location was also observed.


Last updated on 2018-19-10 at 07:55