401 Oxidation behavior in stainless steel 316L in AA-TIG welding process

2012 ◽  
Vol 2012.20 (0) ◽  
pp. _401-1_-_401-2_
Author(s):  
Toshiya IKEGAMI ◽  
Takahisa YAMAZAKI ◽  
Akio SUZUMURA ◽  
Toshi-taka IKESHOJI
Keyword(s):  
Stainless Steel ◽  
Oxidation Behavior ◽  
Welding Process ◽  
Tig Welding ◽  
Stainless Steel 316L

An Investigation of Dissimilar Welding Aluminum Alloys to Stainless Steel by the Tungsten Inert Gas (TIG) Welding Process

2017 ◽  
Vol 904 ◽  
pp. 19-23
Author(s):  
Van Nhat Nguyen ◽  
Quoc Manh Nguyen ◽  
Dang Thi Huong Thao ◽  
Shyh Chour Huang
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Welding Process ◽  
Dissimilar Materials ◽  
Welding Current ◽  
Tig Welding ◽  
Inert Gas ◽  
Dissimilar Welding ◽  
Adjacent Area ◽  
Welding Seam

Welding dissimilar materials has been widely applied in industries. Some of them are considered this as a strategy to develop their future technology products. Aluminum alloy and stainless steel have differences in physical, thermal, mechanical and metallurgic properties. However, selecting a suitable welding process and welding rods can solve this problem. This research aimed to investigate the T-joint welding between A6061 aluminum alloy and SUS304 stainless steel using new welding rods, Aluma-Steel by the Tungsten Inert Gas (TIG) welding process. The mechanical properties, the characteristics of microstructure, and component analysis of the welds have been investigated by the mechanical testing, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). As a result, the fracture occurred at the adjacent area between welding seam and A6061 alloys plate. The thermal cracking appeared at central welding-seam along the base metals if high welding current. A large amount of copper elements found in the welds due to using the new welding rod, Aluma-Steel rod.

Analysis of Filler Metal Composition on Weld Dilution of Austenitic Stainless Steel by TIG and MIG Welding

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
G.T. Gopalakrishna ◽  
B.S. Ajaykumar ◽  
K.R. Vishnu
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Tensile Test ◽  
Base Material ◽  
Welding Process ◽  
Nuclear Industry ◽  
Tig Welding ◽  
Bending Test ◽  
Mig Welding ◽  
Weld Region

Austenitic stainless steels are very important material and extensively used for various applications in fertilizer industry, petrochemical industry, nuclear industry and food industry. Austenitic stainless steel 316L alloyed with small percentage of nitrogen is called 316LN. 316LN is widely used only in nuclear applications and it is also called high temperature steels. This nitrogen alloyed steels 316LN will work at higher temperature environment along with radiation environment without losing its properties. The welding of this 316LN steel poses challenge due to problems like sensitization to inter granular corrosion, stress corrosion cracking and even hot cracking. Selecting the type of welding and filler material is more important for welding the 316LN austenitic stainless steel (SS). In this paper SS 316LN material is being welded with TIG and MIG welding. Three pairs of SS 316LN plates were used for experimental work. Filler electrode ER316L is used for TIG and MIG121 is used for MIG welding. After the welding process, hardness test, tensile test and bending test were performed to check the mechanical properties of the specimen. Microstructure of the specimen is observed at the weld region. The results show that the welded joint is stronger than the base material in TIG welding process compared to MIG welding, combination of TIG and MIG welding. Hardness values are observed to be higher at the weld region than the base material. Tensile test results show that the ultimate tensile strength of welded plate is greater than that of base materials and TIG welding process is better than other two processes. The microstructure images show that there is a continuous and uniform welding and the joint is defect free from cracks.

Performance of weld bead profile during A-TIG welding on nitrogen alloyed stainless steel

2021 ◽  
Author(s):  
Akash Deep ◽  
Vivek Singh ◽  
Som Ashutosh ◽  
M. Chandrasekaran ◽  
Dixit Patel
Keyword(s):  
Stainless Steel ◽  
Welding Process ◽  
Weld Bead ◽  
Tig Welding ◽  
Inert Gas ◽  
Bead Geometry ◽  
Depth Of Penetration ◽  
Weld Bead Geometry ◽  
A Tig Welding ◽  
Arc Welding Process

Abstract Austenitic stainless steel (ASS) is widely fabricated by tungsten inert gas (TIG) welding for aesthetic look and superior mechanical properties while compared to other arc welding process. Hitherto, the limitation of this process is low depth of penetration and less productivity. To overcome this problem activated tungsten inert gas (A-TIG) welding process is employed as an alternative. In this investigation the welding performance of conventional TIG welding is compared with A-TIG process using TiO2 and SiO2 flux with respect to weld bead geometry. The experimental investigation on A-TIG welding of ASS-201 grade shows TiO2 flux helps in achieve higher penetration as compared to SiO2 flux. While welding with SiO2 the hardness in HAZ and weld region higher than that of TIG welding process.

Residual Stress Analysis of TIG Welding Process of Thin-Walled Stainless Steel and Red Copper

2013 ◽  
Vol 834-836 ◽  
pp. 1553-1556
Author(s):  
Han Wu Liu ◽  
Lei Huang ◽  
Xiang Guo ◽  
Yu Long Lv
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Welding Process ◽  
Dissimilar Materials ◽  
Hot Water ◽  
Tig Welding ◽  
Stress Distributions ◽  
Welding Seam ◽  
Junction Area ◽  
Thin Walled

The connecting pipe in solar hot water system is made by TIG welding of thin-walled stainless steel and copper. As the welding of stainless steel and copper belongs to dissimilar metal welding and their physical properties are very different, thus the welding process is difficult and it is likely to cause a variety of defects in the welding process. In this paper, ANSYS software is used to simulate the welding process of stainless steel and copper, and the residual stress distributions in the welding process are obtained. The results show that: at the end of the welding cooling, large residual stress (253MPa) is remained in the junction area of the starting and ending position of welding, which is close to the yield strength of material at the same temperature. Therefore, there will be greater deformation in the junction area and more cracks inside. Meanwhile, the stress distributions of stainless steel and copper tubes in the welding process are greatly different. Different volume changes emerge in two tubes, which are harmful to the welding seam and also leads to the unfitness of dimensional tolerance of welding parts, resulting in the scrapping of welding parts. The results provide references and theoretical basis for the welding technology of dissimilar materials.

Study of Type 316L Stainless Steel TIG Welding with MoO3 Powder

2011 ◽  
Vol 291-294 ◽  
pp. 901-904 ◽  
Author(s):  
Kuang Hung Tseng ◽  
Ko Jui Chuang
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
316L Stainless Steel ◽  
Tig Welding ◽  
Steel Plates ◽  
Angular Distortion ◽  
Stainless Steel 316L ◽  
Surface Appearance ◽  
Type 316L ◽  
Type 316L Stainless Steel

In the present work, a specific oxide flux was used to systematically investigate the effects of activated tungsten inert gas (TIG) welding on the surface appearance, weld morphology, angular distortion, residual stress, and ferrite structure in type 316L stainless steel plates. MoO3 flux used was packed in powdered form. The results showed that MoO3 flux assisted TIG welding technique can produce a significant improvement in power density of heat source and weld aspect ratio, resulting in low angular distortion and residual stress levels. The MoO3 flux assisted TIG welding associated with a rapid cooling rate of the welds, therefore exhibiting higher ferrite content in austenitic stainless steel 316L weld metals during the solidification after welding.

Optimization of laser welding process parameters of stainless steel 316L using FEM, Kriging and NSGA-II

2016 ◽  
Vol 99 ◽  
pp. 147-160 ◽  
Author(s):  
Ping Jiang ◽  
Chaochao Wang ◽  
Qi Zhou ◽  
Xinyu Shao ◽  
Leshi Shu ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Laser Welding ◽  
Process Parameters ◽  
Welding Process ◽  
Stainless Steel 316L ◽  
Nsga Ii ◽  
Laser Welding Process
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