This paper presents the investigations carried out to study the microstructure and mechanical properties of AISI 304 stainless steel and AISI 4140 low alloy steel joints by Gas Tungsten Arc Welding (GTAW), Electron Beam Welding (EBW) and Friction Welding (FRW). For each of the weldments, detailed analysis was conducted on the phase composition, microstructure characteristics and mechanical properties. The results of the analysis shows that the joint made by EBW has the highest tensile strength (681. MPa) than the joint made by GTAW (635. Mpa) and FRW (494. Mpa). From the fractographs, it could be observed that the ductility of the EBW and GTA weldment were higher with an elongation of 32% and 25% respectively when compared with friction weldment (19%). Moreover, the impact strength of weldment made by GTAW is higher compared to EBW and FRW. © 2011 Elsevier Ltd.

Arivazhagan N

Department of Manufacturing Engineering

School of Mechanical Engineering

Vellore Campus

Singh S

Prakash S

Reddy G.M.

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 & Design

Plasma Arc Welding (PAW) is one of the important arc welding processes used in electronics, medical, automotive and aerospace industries due its high accuracy and ability of welding any hard materials which is more tolerant to joint misalignment than Laser Beam Welding (LBW) at a lower cost. Thickness of 1.6mm plates were used to obtain full penetration and a strong joint with a very narrow Heat Affected Zone. The present study deals with the effect of mechanical and corrosion resistance properties of butt welded 1.6 mm thick martensitic stainless steel-similar (SS410 and SS410) joints made by plasma arc welding technique. Similar butt Welded joints were analyzed by using mechanical (Bend test, Erichsen cup test, Tensile test) characterization methods. Their corresponding corrosion resistance properties were also investigated by potentiodynamic polarization corrosion testing technique. The tensile strength was found to be 341 MPa for similar SS410 weld. During tensile test the failure occurred on the base metal on both similar joints Keywords: SS304; SS410; PAW; Butt weld; Erichsen Cup Test; Microstructure.

Materials Science Forum

Effect of Mechanical Properties and Corrosion Behaviour of Martensitic Stainless Steel 410 1.6mm Butt Welded by Plasma Arc Welding

This review article summarizes the extensive research works carried out on ferrous alloys and critically examine several aspects of FSW in these materials. Particularly suitable tool materials, tool geometry, effect of tool geometry in metallurgical and mechanical properties of weldment were being discussed. Ever since The Welding Institute (TWI) developed the Friction Stir Welding (FSW) process, extensive studies were being carried out by joining different materials in various laboratory. Initially FSW process was developed for aluminium alloys slowly the technique is adopted for other softer materials such as magnesium, lead and zinc. Later, improvement in tool material lead to use of the eco-friendly welding process (FSW) to other hard materials such as copper, brass, stainless steel, hardened steel and superalloys. Even though several studies shows the capacity of FSW process to join hard materials, the process creates high stress and temperature at the stir zone (approximately 1300°C) which endorses fast tool degradation is the major concern during the process. High tool cost due to fast tool degradation, makes commercial application of FSW on hard metal as challenging. Introduction of polycrystalline cubic boron nitride (PCBN) and tungsten alloys tool materials made FSW possible on stainless steel, hardened steel and superalloys with outstanding results in terms of weld strength and microstructural properties. © 2017 Elsevier Ltd.

Materials Today: Proceedings

Review on friction stir welding of steels

Fulltext

IOP Conference Series: Materials Science and Engineering

On dissimilar metal welding of AISI4140 and AISI410 by GTAW

High temperature corrosion resistance of welded components in power plant industry, hot sections of gas turbines, boilers, industrial waste incinerators, metallurgical furnaces and petrochemical installations is one of the serious necessity. The failure of hot sections of welded component is due to the deposition of molten salt which accelerates the hot corrosion reactions in the weld joint. In this research work, the oxy-chlorination of dissimilar weldments between AISI 304L austenitic stainless steel and AISI 4340 alloy steel at 600°C in eutectic mixture of K2SO4 + 60% NaCl under molten salt conditions was investigated. Corrosion kinetics for this dissimilar joints calculated from the thermogravimetric charts were represented. Corrosion on the dissimilar joint employing E309L filler in pulsed current gas tungsten arc welding process is found to be very aggressive, due to the fragmented delta ferrites at numerous locations resulting in the formation of the micro electrochemical cells, which act as sites for corrosion initiation and thus leading to higher corrosion rate. However, in the case of continuous current, the joint is able to protect itself better in this environment due to lower amounts of delta ferrites in weld zone, which is attributed to the higher temperature available in continuous mode leading to austenisation of delta ferrites in the multipass welding. © 2017 Institute of Materials, Minerals and Mining Published by Taylor &amp; Francis on behalf of the Institute.

Corrosion Engineering, Science and Technology

Hot-corrosion resistance of dissimilar AISI 4340 and AISI 304L weldments in the molten salt environment at 600°C

Bimetallic joints of low alloy steel and stainless steel are widely used in high temperature corrosive environments. In the present investigation, an attempt has been made to investigate the weldability of AISI 4140 and AISI 316 by Gas Tungsten Arc Welding (GTAW) process with and without filler metal. The filler metal employed for joining these dissimilar metals was ER309L. Microscopic examination was carried out across the composite region of the weldment. Hardness and Tensile studies were performed to characterize the weldments for their mechanical properties. SEM fractography is carried out to get insight information on the mode of fracture. Also SEM/EDAX analysis has been performed to determine the structure-property relationships. © 2013 The Authors. Published by Elsevier Ltd.

Procedia Engineering

Assessment of Mechanical Properties of AISI 4140 and AISI 316 Dissimilar Weldments

Journal of Testing and Evaluation

Stress Concentration Factors for ASTM E8/E8M-16a Standard Round Specimens for Tension Testing

Optics and Lasers in Engineering

Study on microstructure and mechanical properties of 304 stainless steel joints by TIG, laser and laser-TIG hybrid welding

Investigation of the mechanical properties and microstructure of friction welded joints between AISI 4140 and AISI 1050 steels

Optimization of tensile strength of ferritic/austenitic laser-welded components

Pulsed Nd:YAG laser welding of AISI 304 to AISI 420 stainless steels

Investigation on AISI 304 austenitic stainless steel to AISI 4140 low alloy steel dissimilar joints by gas tungsten arc, electron beam and friction welding

Journal	Data powered by TypesetMaterials & Design
Publisher	Data powered by TypesetElsevier BV
ISSN	0261-3069
Open Access	No