Effect of manganese and nitrogen on the solidification mode in austenitic stainless steel welds

Prediction of the .DELTA. to .GAMMA. Transition in Austenitic Stainless Steels during Laser Treatment.

“…This is induced by stronger microsegregation of trace elements such as P, S when austenite (y) dendrites form instead of ferrite (~) dendrites.1~3 ) It is known that the tendency toward hot cracking can be minimized by producing a certain amount of 8- (i,e., Cr/Ni-equivalent) is used to predict the solidification structure such as residual 8-ferrite content46) and the primary solidification phase. 7,8) Moreover, microstructural transitions from stable O [C] . [ Figure 4 showsthe effects of composition and growth velocity on the phase selection during laser remelting.…”

Investigation of the Resistance to Localized Corrosion Associated with Microstructure of Tube-to-Tube Sheet Welds of UNS S32050 Super Austenitic Stainless Steel for Seawater Cooled Condenser

“…[25][26][27][28] Due to the enrichment of the ferrite () stabilizing substitutional elements such as the Cr and Mo retained in the melt between the dendrites, the last fraction can solidify eutectically to a and , or purely as an . The interdendritic ferrite has a high Cr and Mo content and upon further cooling it decomposes into sigma or similar intermetallic phases.…”

“…Galvanic corrosion can occur at these dendrite cores. [25][26][27][28] 3.2 The microstructures of tube-to-tube sheet welds Figure 4 shows the optical microstructures of the UNS S32050 SASS tube-to-tube sheet welds. The specimens were electrolytically etched using 10 mass% oxalic acid to classify the etch structures of the WM and HAZ according to ASTM A 262-Practice A.…”

Microstructure, Recrystallization, and Mechanical Property Evolutions in the Heat-Affected and Fusion Zones of the Dissimilar Stainless Steels

“…The composition balance between ferrite stabilizing elements and the austenite stabilizing elements (i.e., Cr eq /Ni eq ratio 4) ) is used to predict the solidification microstructures such as residual -ferrite contents 5,6) and the solidification types. [7][8][9] The solidification mode of the stainless steel weld metal is normally classified into four types such as austenite (A), austenite-ferrite (AF), ferrite-austenite (FA), and ferrite (F). [10][11][12][13][14][15][16] The A and AF solidification modes are associated with primary austenite solidification, whereby austenite is the first phase to form upon solidification.…”