In this work, the microstructural character of dissimilar welds between Incoloy 800H and 321 Stainless Steel has been discussed. The microscopic examination of the base metals, fusion zones and interfaces was characterized using an optical microscope and scanning electron microscopy. The results revealed precipitates of Ti (C, N) in the austenitic matrix along the grain boundaries of the base metals. Migration of grain boundaries in the Inconel 82 weld metal was very extensive when compared to Inconel 617 weldment. Epitaxial growth was observed in the 617 weldment which increases the strength and ductility of the weld metal. Unmixed zone near the fusion line between 321 Stainless Steel and Inconel 82 weld metal was identified. From the results, it has been concluded that Inconel 617 filler metal is a preferable choice for the joint between Incoloy 800H and 321 Stainless Steel. © 2015 Elsevier Inc.

Arivazhagan N

Department of Manufacturing Engineering

School of Mechanical Engineering

Vellore Campus

Sayiram G

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Materials Characterization

The present study investigates the dissimilar weld joints between AISI 316L and Duplex 2205 stainless steel. The joints were fabricated with the Pulsed current gas tungsten arc welding with ER316L and ER309L filler wire. The weld joints were subjected to metallurgical and mechanical characterization. The macro examination and optical microstructure examination were carried out to see the defect in the weld joints and structural changes in the fusion zone. The results show that the defect free welding was achieved in the both the filler wire. The optical microstructure shows the ferritic structure in both filler wire. The strength of the weld joints was tested with the tensile test. The results indicate the fracture occurred in the base metal in both cases. © Published under licence by IOP Publishing Ltd.

Fulltext

IOP Conference Series: Materials Science and Engineering

Investigation on microstructure and tensile properties of dissimilar weld joints between AISI 316l and duplex 2205 stainless steel

An attempt is made to reduce the residual stresses by means of vibratory stress relief (VSR) by using an electromagnetic exciter. This paper examines the residual stresses induced in a CO2 laser welded AISI 316 austenitic stainless-steel plates. In this paper, a new approach of reliving stresses has been discussed using an electromagnetic exciter which is easy to apply and overcomes some of the limitations that other VSR procedures currently have. Various tests such as tensile test, impact test, micro- hardness test, and micro-resistivity test were conducted to validate the effectiveness of the residual stress reduction. The residual stress was relived from the AISI 316 welded plates with an average magnitude of 100 MPa. © 2017 Elsevier B.V.

Materials Science and Engineering: A

The residual stress distribution of CO2 laser beam welded AISI 316 austenitic stainless steel and the effect of vibratory stress relief

In the research work, an attempt is made to join nickel-based alloy 825 by employing CO2 laser beam welding. Successful full penetration weld joint of a 5 mm thick plate is achieved with a very low heat input of 120 J-mm−1. Narrow weld bead width of 0.6 mm at the root and 1.6 mm at the cap is observed fusion zone; the interface and base metal microstructures have been examined using both optical and scanning electron microscopic techniques to understand the microstructural changes which have occurred due to laser welding. A range of tests of Vickers micro hardness, tensile and impact tests had been performed on the weldment to ascertain the mechanical properties of the joint. Tensile failure at the base metal and a 180° root bend test conducted on the weldment ascertain the soundness of the weld joint produced. An attempt is made to correlate the microstructure and mechanical properties of the weldment. Intermetallics TiN and Al4C3 observed in the SEM\EDS analysis at the fusion zone are found to have improved the weld metal strength and hardness. © 2017 Canadian Institute of Mining, Metallurgy and Petroleum.

Canadian Metallurgical Quarterly

Investigations on metallurgical and mechanical properties of CO2 laser beam welded Alloy 825

The needs of the dissimilar weld joint between superalloy and stainless steel is increasing in many industries. Gas tungsten arc welding (GTAW) and shield metal arc welding (SMAW) are the most common methods used to fabricate the weld joints in the fabrication industry due to its high versatility in the fabrication of industrial components and parts. The present study investigated the metallurgical and mechanical properties of bimetallic joints fabricated between nickel-based superalloy Incoloy 800 and stainless steel AISI 316L. The weld joints were fabricated by using ERNiCrMo-3 filler wire. The micrograph of weld fusion zone revealed the austenitic microstructure with columnar dendrite and cellular structure in both weldments. SEM/EDS analysis witnessed the precipitation of Nb-rich phase in the weld fusion zone fabricated by SMAW process, and it was minimized in case of GTA welding technique. The strength and toughness of the weld joint fabricated by GTAW improved 14 and 25% respectively when compared to SMAW technique. © 2017, The Indian Institute of Metals - IIM.

Transactions of the Indian Institute of Metals

Comparative Studies on Metallurgical and Mechanical Properties of Bimetallic Combination on Incoloy 800 and SS 316L Fabricated by Gas Metal and Shield Metal Arc Welding

Welding Metallurgy and Weldability

Appendix B Nominal Composition of Stainless Steels

Journal of Alloys and Compounds

Hot workability of AISI 321 and AISI 304 austenitic stainless steels

International Journal of Pressure Vessels and Piping

An assessment of microstructure, mechanical properties and corrosion resistance of dissimilar welds between Inconel 718 and 310S austenitic stainless steel

Finite element simulation of residual stresses induced by the dissimilar welding of a P92 steel pipe with weld metal IN625

Materials & Design

Microstructure and mechanical properties of AISI 347 stainless steel/A335 low alloy steel dissimilar joint produced by gas tungsten arc welding

Microstructural characterization of dissimilar welds between Incoloy 800H and 321 Austenitic Stainless Steel

Journal	Data powered by TypesetMaterials Characterization
Publisher	Data powered by TypesetElsevier BV
ISSN	1044-5803
Open Access	No