Effect of heat input on dissimilar welds of ultra high strength steel and duplex stainless steel: Microstructural and compositional analysis

2017 ◽  
Vol 123 ◽  
pp. 29-41 ◽  
Author(s):  
H. Tasalloti ◽  
P. Kah ◽  
J. Martikainen
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Heat Input ◽  
High Strength Steel ◽  
Compositional Analysis ◽  
High Strength ◽  
Dissimilar Welds ◽  
Ultra High Strength Steel

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

2017 ◽  
Author(s):  
Hamed Tasalloti Kashani ◽  
Mohammad Dabiri ◽  
Paul Kah ◽  
Jukka Martikainen
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Heat Input ◽  
Fatigue Behavior ◽  
Hardness Profile ◽  
Ultrahigh Strength ◽  
Ultrahigh Strength Steel ◽  
Dissimilar Welds ◽  
Lower Heat ◽  
Geometrical Effects

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.

CRUCIBLE D6

Alloy Digest ◽  
1962 ◽  
Vol 11 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Low Temperature ◽  
High Strength Steel ◽  
High Strength ◽  
Heat Treating ◽  
Steel Company ◽  
Temperature Performance ◽  
Ultra High Strength Steel ◽  
Crucible Steel

Abstract Crucible D6 is a low alloy ultra-high strength steel developed for aircraft-missile applications and primarily designed for use in the 260,000-290,000 psi tensile strength range. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on low temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-129. Producer or source: Crucible Steel Company of America.

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