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Journal ArticleDOI

On dissimilar metal welding of AISI4140 and AISI410 by GTAW

01 Nov 2017-Vol. 263, Iss: 6, pp 062067
TL;DR: In this paper, the results of metallurgical and mechanical examinations of Gas Tungsten Arc Welding of dissimilar steels AISI4140 and SS410 were presented.
Abstract: This paper presents the results of metallurgical and mechanical examinations of Gas Tungsten Arc Welding of dissimilar steels AISI4140 and AISI410. Two different filler materials viz., ERNiCr3 and SS410 were used. The various properties of the weldments made using the fillers were compared to select the most appropriate one to get the sound joint. The ultimate tensile and yield strengths of the weldments of SS410 were greater than those of ERNiCr3. The fracture occurred at the weld in weldments made with ERNiCr3, whereas, in the base metal of AISI410 for weldments made with SS410. Microstructure of fusion zone of ERNiCr3 was fully austenitic. Microhardness values in the weld of SS410 were higher and fluctuating compared to those in the weld of ERNiCr3. From this research work, it shall be concluded that SS410 is the best filler material to weld these base materials.
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TL;DR: In this paper , the weldability and metallurgical characteristics of the dissimilar joints of high nitrogen steel and low alloy martensitic steel were compared by three types of consumables.
Abstract: Dissimilar welding of high nitrogen steel and low alloy martensitic steel has a large application prospect in power plants and offshore structures. In this paper, the weldability was studied by comparing and analyzing the metallurgical characteristics and mechanical properties of the dissimilar joints by three types of consumables. Among the welding materials of austenitic ER 307Mo, duplex ER 2209, and martensitic ER 120S-G, macroscopic gas pores appeared in the weld with ER 2209 and ER 120S-G, which were both caused by the mix of the nitrogen-containing molten metal and low alloy steel, where the elements that promote nitrogen solubility were rapidly diluted, resulting in a violent escape of nitrogen. In ER 307Mo weld, because of the high content of alloying elements and the minimal fusion ratio, nitrogen only escaped as the micropores and small precipitates, which have no obvious effect on the performance of the weld. It is a good solution to solve the problems of dissimilar welding by selecting a filler metal that does not contain nitrogen but can dissolve nitrogen, and using the dissolution of high nitrogen steel to strengthen the weld based on controlling the fusion ratio. Finally, nitrogen behavior during the welding process was discussed and analyzed combined with porosity distribution, nitrogen distribution, and microstructure.

1 citations

References
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Journal ArticleDOI
TL;DR: A survey of state-of-the-art EBW of dissimilar metals, with special emphasis on showing the potential of the process for achieving high-quality dissimilar-metal joints is presented in this paper.

341 citations

Journal ArticleDOI
TL;DR: In this paper, the authors compared welding of AISI 310 austenitic stainless steel to Inconel 657 nickel-chromium superalloy and showed that Inconels A showed the least susceptibility to hot cracking.

223 citations

Journal ArticleDOI
TL;DR: In this article, the microstructure and mechanical properties of AISI 304 stainless steel and low alloy steel joints by Gas Tungsten Arc Welding, Electron Beam Welding (EBW), and Friction Welding were investigated.

219 citations

Journal ArticleDOI
TL;DR: In this paper, the microstructure and corrosion resistance of dissimilar weld-joints between stainless steel SAF 2205 and stainless steel AISI 316L were investigated, and different types of welding wires AWS ER 347, AWS ER 316L and AWS ER 309L were used to verify soundness of welded samples.

94 citations

Journal ArticleDOI
TL;DR: In this article, the replacement compatibility of most widely used conventional austenitic stainless steel (type 304) was investigated by employing dissimilar weldments with high nitrogen stainless steels (type 201) using scanning electron microscope coupled with EDS and X-ray diffraction techniques.

79 citations