scholarly journals Nd: YAG Pulsed Laser Dissimilar Welding of UNS S32750 Duplex with 316L Austenitic Stainless Steel

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2906 ◽  
Author(s):  
Carla Gabriela Silva Leite ◽  
Eli Jorge da Cruz Junior ◽  
Mattia Lago ◽  
Andrea Zambon ◽  
Irene Calliari ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Fusion Zone ◽  
Stainless Steels ◽  
Pulsed Laser ◽  
High Strength ◽  
Ferrite Matrix ◽  
Industrial Applications ◽  
Dissimilar Welding ◽  
316L Austenitic Stainless Steel

Duplex stainless steels (DSSs), a particular category of stainless steels, are employed in all kinds of industrial applications where excellent corrosion resistance and high strength are necessary. These good properties are provided by their biphasic microstructure, consisting of ferrite and austenite in almost equal volume fractions of phases. In the present work, Nd: YAG pulsed laser dissimilar welding of UNS S32750 super duplex stainless steel (SDSS) with 316L austenitic stainless steel (ASS), with different heat inputs, was investigated. The results showed that the fusion zone microstructure observed consisted of a ferrite matrix with grain boundary austenite (GBA), Widmanstätten austenite (WA) and intragranular austenite (IA), with the same proportion of ferrite and austenite phases. Changes in the heat input (between 45, 90 and 120 J/mm) did not significantly affect the ferrite/austenite phase balance and the microhardness in the fusion zone.

CRUCIBLE 174 SXR

Alloy Digest ◽  
2009 ◽  
Vol 58 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Stainless Steels ◽  
Precipitation Hardening ◽  
High Strength ◽  
Heat Treating ◽  
Martensitic Stainless Steels ◽  
Excellent Corrosion Resistance

Abstract Crucible 174 SXR is a premium-quality precipitation-hardening stainless steel designed for use as rifle barrels. It is a modification of Crucible’s 17Cr-4Ni that offers substantially improved machinability without sacrificing toughness. Its excellent corrosion resistance approaches that of a 300 series austenitic stainless steel, while its high strength is characteristic of 400 series martensitic stainless steels. At similar hardness levels, Crucible 174 SXR offers greater toughness than either the 410 or 416 stainless steels which are commonly used for rifle barrels. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming and heat treating. Filing Code: SS-1034. Producer or source: Crucible Service Centers.

Characterization of Dissimilar Welded Joints Between Austenitic and Duplex Stainless Steel Grades for Liquid Tank Applications

2018 ◽  
Author(s):  
G. Ubertalli ◽  
M. Ferraris ◽  
P. Matteis ◽  
D. Di Saverio
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Stainless Steels ◽  
Welded Joints ◽  
Industrial Applications ◽  
Duplex Stainless Steels ◽  
Steel Pipes ◽  
Steel Grades ◽  
Welding Processes

Lean duplex stainless steels have similar corrosion and better mechanical properties than the austenitic grades, which ensure their extensive spreading in industrial applications as a substitute of austenitic grades. In the construction of liquid tanks, however, it is often necessary to weld such steels with a range of fittings which are commonly fabricated with austenitic stainless steel grades. Therefore, this paper examines dissimilar welded joints between LDX 2101 (or X2CrMnNiN22-5-2) lean duplex stainless steels plates and austenitic stainless steel pipes, carried out by different arc welding processes. The investigation focuses on the correlation between the welding procedures and the microstructural and mechanical properties of the welded joints.

NIPPON/SUMITOMO NF709

Alloy Digest ◽  
2014 ◽  
Vol 63 (8) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Tensile Properties ◽  
Stainless Steels ◽  
High Strength ◽  
Temperature Performance

Abstract Sumitomo NF709 is a high temperature austenitic stainless steel with high strength. It also has better steam and hot chloride alkali oxidation than conventional stainless steels. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming. Filing Code: SS-1180. Producer or source: Sumitomo Metal USA Corporation.

scholarly journals Tensile Properties of 21-6-9 Austenitic Stainless Steel Built Using Laser Powder-Bed Fusion

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4280
Author(s):  
Magnus Neikter ◽  
Emil Edin ◽  
Sebastian Proper ◽  
Phavan Bhaskar ◽  
Gopi Krishna Nekkalapudi ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Tensile Properties ◽  
Elevated Temperatures ◽  
High Strength ◽  
Industrial Applications ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Anisotropic Behavior ◽  
Powder Bed

Alloy 21-6-9 is an austenitic stainless steel with high strength, thermal stability at high temperatures, and retained toughness at cryogenic temperatures. This type of steel has been used for aerospace applications for decades, using traditional manufacturing processes. However, limited research has been conducted on this alloy manufactured using laser powder-bed fusion (LPBF). Therefore, in this work, a design of experiment (DOE) was performed to obtain optimized process parameters with regard to low porosity. Once the optimized parameters were established, horizontal and vertical blanks were built to investigate the mechanical properties and potential anisotropic behavior. As this alloy is exposed to elevated temperatures in industrial applications, the effect of elevated temperatures (room temperature and 750 °C) on the tensile properties was investigated. In this work, it was shown that alloy 21-6-9 could be built successfully using LPBF, with good properties and a density of 99.7%, having an ultimate tensile strength of 825 MPa, with an elongation of 41%, and without any significant anisotropic behavior.

scholarly journals Parametric studies of dissimilar welding of AISI 409 ferritic stainless steel to AISI 316L austenitic stainless steel using Taguchi desirability analyses

2018 ◽  
Vol 27 (1-2) ◽  
Author(s):  
Nabendu Ghosh ◽  
Pradip Kumar Pal ◽  
Goutam Nandi
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Gas Flow ◽  
Gas Metal Arc Welding ◽  
Welding Current ◽  
Dissimilar Welding ◽  
Aisi 316L ◽  
Dissimilar Joints ◽  
316L Austenitic Stainless Steel

AbstractIn the present work, dissimilar joints between AISI 409 ferritic stainless steel and AISI 316L austenitic stainless steel were made by gas metal arc welding (GMAW) using ESAB AUTO Rod 316L as a filler wire. Welding was conducted as per the L9 orthogonal array using the Taguchi method. Three levels of the input parameters: welding current, gas flow rate and nozzle to plate distance were selected. After welding, visual inspection and an X-ray radiographic test were conducted on the weld specimens to detect surface and sub-surface defects of weld specimens made from dissimilar stainless steels. The quality of the weld was evaluated in terms of yield strength, ultimate tensile strength and percentage of elongation of the welded specimens. The observed data are interpreted, discussed and analyzed using Taguchi desirability analyses.

Observations of Gas Bubbles in an Austenitic Stainless Steel Charged with3H

1980 ◽  
Vol 38 ◽  
pp. 388-389
Author(s):  
P. S. Sklad
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Gas Phase ◽  
Stainless Steels ◽  
Fusion Reactor ◽  
High Strength ◽  
Tensile Tests ◽  
Weight Percent ◽  
High Energy ◽  
High Energy Rate

Nitronic 40 is a high-strength austenitic stainless steel. Investigations are in progress to explore the possibility of using this material as a high-strength substitute for 300 series stainless steels, especially in hydrogen environments. There is also interest in determining the influence of helium on the mechanical properties of this material from the viewpoint of fusion reactor systems. The alloy is nominally (in weight percent) 21 Cr, 6 Ni, 9 Mn, and 63 Fe and is strengthened by 0.35 wt % N. Smooth bar tensile specimens approximately 3.5 mm in diameter with 25 mm gage lengths were machined from high energy rate forged (HERF) stock. These specimens were then gas phase charged with 2H at 64 MPa pressure at 470 K or 3H at 47.5 MPa at 345 K for 1450 h. Due to the nature of the charging the 3H distribution was nonuniform, ranging from approximately 1300 ppm at the specimen surface to less than 5 ppm at a depth of 0.5 mm from the surface. Following charging, the specimens were stored at ˜250 K for 5.5 years. Approximately one-third of the tritium decayed to 3He during this period, yielding a maximum of 900 ppm of 3He at the surface of the specimens. Tensile tests at 298 K revealed a significantly greater loss in ductility in the specimens charged with 3H. Following tensile testing TEM specimens of suitable size were sectioned near the fracture surface, thinned using conventional techniques for radioactive specimens, and examined. Electron microscopy was performed in a Philips EM 400T equipped with a field emission gun.

scholarly journals Effect of Heat Input on the Microstructural, Mechanical, and Corrosion Properties of Dissimilar Weldment of Conventional Austenitic Stainless Steel and Low-Nickel Stainless Steel

2020 ◽  
Vol 9 (5) ◽  
pp. 668-677
Author(s):  
Vipin Tandon ◽  
Manish A. Thombre ◽  
Awanikumar P. Patil ◽  
Ravindra V. Taiwade ◽  
Himanshu Vashishtha
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Fusion Zone ◽  
Heat Input ◽  
Dissimilar Welding ◽  
Input Process ◽  
Stainless Steel 316L ◽  
Corrosion Properties ◽  
Gas Tungsten Arc ◽  
Mechanical And Corrosion Properties

AbstractIn the present investigation, an attempt has been made to investigate the replacement compatibility of conventional austenitic stainless steel (316L) with low-Ni austenitic stainless steel (201) by employing their dissimilar welding using gas tungsten arc welding technique with varying heat input. The effects of heat input on the microstructural, mechanical, and corrosion properties were studied. The result depicts the balanced austenite/ferrite content in the fusion zone for both the heat inputs. The low heat input process, which results in a faster cooling rate, demonstrates higher tensile strength and microhardness. Similarly, the pitting corrosion resistance of the fusion zone demonstrates better properties on the low heat input process attributed to the lesser dendritic length and lesser interdendritic arm spacing.

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