Influence of shielding gases on grain refinement in welds of stabilized 21 % Cr ferritic stainless steel

Anttila, Severi; Porter, David

doi:10.1007/s40194-014-0160-9

Cited by 8 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results indicate that increasing the N 2 , O 2 , and NO contents in the Ar-based shielding gas not only affected the macrostructure of the welds but also affected the angular distortion and, consequently, the mechanical properties of the welded joints. Anttila and Porter [4] investigated the effect of shielding gases on grain refinement in welds formed by GTAW of stabilized 21wt% Cr ferritic stainless steel. They found that the use of N 2 as a shielding gas component led to extensive nitride precipitation in GTA welds and, subsequently, to a reduction in impact energy.…”

Section: Macrostructure and Appearance Of Jointsmentioning

confidence: 99%

“…They found that, compared to the pulsed GMAW technique, the DP-GMAW technique, despite having a theoretically greater potential for pore generation, did not increase the susceptibility of the Al to pore formation during welding. Anttila and Porter [4] investigated the effect of shielding gas mixtures of Ar, N 2 , and O 2 in welds of stabilized 21wt% Cr ferritic stainless steel in autogenous gas tungsten arc welding (GTAW) and laser welding to explore the possibility of inducing grain refinement. They found that N 2 addition alone was inadequate because O 2 was needed to produce oxide inoculants for nitrides and to produce a uniform slag to protect the solidifying weld pool surface from N 2 outgassing.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of shielding gas on the mechanical and metallurgical properties of DP-GMA-welded 5083-H321 aluminum alloy

Koushki

Goodarzi

Paidar

2016

Int J Miner Metall Mater

View full text Add to dashboard Cite

In the present research, 6-mm-thick 5083-H321 aluminum alloy was joined by the double-pulsed gas metal arc welding (DP-GMAW) process. The objective was to investigate the influence of the shielding gas composition on the microstructure and properties of GMA welds. A macrostructural study indicated that the addition of nitrogen and oxygen to the argon shielding gas resulted in better weld penetration. Furthermore, the tensile strength and bending strength of the welds were improved when oxygen and nitrogen (at concentrations as high as approximately 0.1vol%) were added to the shielding gas; however, these properties were adversely affected when the oxygen and nitrogen contents were increased further. This behavior was attributed to the formation of excessive brown and black oxide films on the bead surface, the formation of intermetallic compounds in the weld metal, and the formation of thicker oxide layers on the bead surface with increasing nitrogen and oxygen contents in the argon-based shielding gas. Analysis by energy-dispersive X-ray spectroscopy revealed that most of these compounds are nitrides or oxides.

show abstract

Section: Macrostructure and Appearance Of Jointsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of shielding gas on the mechanical and metallurgical properties of DP-GMA-welded 5083-H321 aluminum alloy

Koushki

Goodarzi

Paidar

2016

Int J Miner Metall Mater

View full text Add to dashboard Cite

show abstract

“…Currently, in arc welding, various possibilities are currently used to influence the weld seam characteristics. These are, among others, the modification of the viscosity of the melt and the arc characteristics through the use of different shielding gases [1,2], and modern welding process controls [3,4]. The use of nanoparticles on the welding filler surface is also currently being investigated for the modification of the weld metal properties and the arc [5].…”

Section: Introductionmentioning

confidence: 99%

Usage of Ti-surface-modified filler material to increase the joint strength of High-Strength Low Alloyed (HSLA) steels under different load types

Treutler

Wesling

2020

SN Appl. Sci.

View full text Add to dashboard Cite

Welding-related loss of strength, especially in the case of fatigue, significantly reduces the range of applications for high-strength fine-grained structural steels. In order to counteract this situation, the aim of the work is to increase the strength of welded joints made of high-strength fine-grained structural steels by using coated welding consumables. This is described using the example of a titanium coating for quasi-static and abrupt dynamic load and fatigue. The thermomechanical rolled fine-grained structural steel S700MC is used as the base material, using a welding filler of the same type. MAG welding was used to produce the fillet welds on a T-joint. In addition to tensile tests at four different load speeds up to 2 m/s, the results of fatigue tests are presented. In addition, the microstructure of the weld seams is examined by metallographic methods and the scanning electron microscope. A comparison with two joints from an unmodified variant and another steel grade with comparable properties (S690QL) serves to classify the results. It is shown that the use of modified filler metals has a significant influence on the overall strength of the welded joint due to the rounding of the weld toe. Thus, the fatigue strength can be increased by around 50%. In addition, the strength under sudden dynamic load can be increased by 10%.

show abstract

Research status of welding technology of ferritic stainless steel

Dong

Lee

et al. 2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Influence of shielding gases on grain refinement in welds of stabilized 21 % Cr ferritic stainless steel

Cited by 8 publications

References 7 publications

Influence of shielding gas on the mechanical and metallurgical properties of DP-GMA-welded 5083-H321 aluminum alloy

Influence of shielding gas on the mechanical and metallurgical properties of DP-GMA-welded 5083-H321 aluminum alloy

Usage of Ti-surface-modified filler material to increase the joint strength of High-Strength Low Alloyed (HSLA) steels under different load types

Research status of welding technology of ferritic stainless steel

Contact Info

Product

Resources

About