Welding Metallurgy of
01 Jan 1987-
About: The article was published on 1987-01-01 and is currently open access. It has received 991 citations till now. The article focuses on the topics: Welding.
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TL;DR: In this paper, the influence of alumina addition on weld appearance, microstructure and mechanical properties of metal inert gas (MIG) welded low carbon mild steel were investigated.
Abstract: In this study, influence of alumina addition on weld appearance, microstructure and mechanical properties of metal inert gas (MIG) welded low carbon mild steel were emphatically investigated. Experimental results show that all the joints were smooth with free of cracks. Microstructures of MIG and laser remelted joints show the presence of columnar and equiaxed dendrites. Furthermore, superior microhardness of MIG welded joint over alumina added and laser remelted joints is ascribed to the presence of columnar dendrites. Fractography of the tensile tested alumina added joint exhibited a mixed mode of ductile and brittle characteristics and this is attributed to the presence of acicular ferrites and bainite in the microstructure.
3 citations
DOI•
01 Oct 2017
TL;DR: In this article, the effect of welding current, pressure of shielding gas, welding speed and diameter of filler material on the formability and mechanical properties of tailor welded blanks is investigated.
Abstract: Welding method and its parameters has an important effect on the formability and mechanical properties of tailor welded blanks(TWBs). In this study gas tungsten arc welding(GTAW) is used to joint aluminum TWBs. Aluminum TWBs consist of 6061 aluminum sheets with different thickness of 1mm and 2mm. Main parameters of GTAW consist of welding current, pressure of shielding gas, welding speed and diameter of filler material are investigated. Design of experiment based on the Tauguchi method is used to investigate the effect of each parameter and also parameters interaction. Erichsen formability test which is an out-of-plane forming test is used for formability investigation of aluminum TWBs. Forming height of Erichsen test is used as a criterion to study the effect of GTAW parameters on the quality of aluminum TWBs. Results of present study shows that shielding gas pressure and welding speed have the greatest impact on the formability of aluminum TWBs.
3 citations
Cites background from "Welding Metallurgy of"
...Gas Tungsten Arc Welding (GTAW), commonly call TIG (tungsten inert gas), is a process that uses a non consumable tungsten electrode and an inert gas for shielding [6]....
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TL;DR: In this article, the effect of using Ni in weld metals on their corrosion parameters and microstructures was examined on weld metals made of weld electrodes of the E8018-G type in conditions equal to industrial standards.
Abstract: Due to the importance of the weld metal corrosion, this study aims at the effect of using Ni in weld metals on their corrosion parameters and microstructures. In this regard, the effect of negligible amounts of Ni up to 8.0 wt.% is examined on weld metals made of weld electrodes of the E8018-G type in conditions equal to industrial standards. The corrosion parameters of the weld metals are evaluated through potentiodynamic polarization and electrochemical impedance spectroscopy experiments in a corrosive solution of 3.5% NaCl. The morphology of the weld metals is examined using field emission scanning electron microscopy and optical microscopy. Through evaluating the morphology, corrosion current density (Jcorr), corrosion rate (CR), and polarization resistance (RP) of the weld metals containing different amounts of Ni, it is indicated that Ni plays an important role in creating anti-corrosion properties. The microstructure studies indicate that a weld metal containing 2.91 wt.% Ni is homogeneous, and its major phase is acicular ferrite (AF). The results also show that an optimal amount of 2.91 wt.% Ni in a weld metal provides the highest corrosion resistance in a corrosive solution.
3 citations
30 Apr 2022-Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
TL;DR: In this article , a novel technology has been developed to recycle steel slag as a flux for the submerged arc welding process, and the chemical, mechanical, and metallurgical properties of welds produced using recycled slag have been evaluated and compared with that of fresh flux available in the market.
Abstract: A novel technology has been developed to recycle steel slag as a flux for the submerged arc welding process. The chemical, mechanical, and metallurgical properties of welds produced using recycled slag have been evaluated and compared with that of fresh flux available in the market. The tensile strengths of weld metal prepared with recycled slag and fresh flux are 462.25 MPa and 471.49 MPa, which are comparable. The impact strength of welds produced using recycled slag is 83.66 J which is acceptable in accordance with AWS SFA 5.17 specifications. The welds produced were subjected to non-destructive tests such as radiography and also dye-penetration test apart from visual inspection to ascertain the soundness of welds produced. Metallurgical investigations were carried out, and a favorable microstructure containing acicular ferrite was obtained in welds deposited using recycled slag. Similar trends of microhardness survey have been observed in both the welds produced.
3 citations
01 Jan 2008
TL;DR: In this article, the quality of traverse crane wheels made of weld repaired Gr. 90-60 material, ASTM A148, was analyzed with three types of weld repair technologies with various filling materials.
Abstract: The article deals with analysis the quality of traverse crane wheels made of weld repaired Gr. 90-60 material, ASTM A148. Three types of weld repair technologies with various filling materials were used. Weared wheel was welded with one interlayer in combination of additional materials wire A 106 with F 1, and two cover layers made in combination of A 508 wire with F 13 addition. Wheel surface was hardened after welding to depth of 3 mm. As a second technology was combination of A 106 wire with F 11 addition. Two cover layers were made by combination of RD 520 wire with F 56 addition. Third technology was realized with one layer of C 113 wire in inert atmosphere 80 % Ar + 20% CO2. Two cover layers were made by wire with self protect Lincore 40-O. Properties of repaired traverse crane wheels were compared with the properties of new wheels with surface hardened layer. The welds were exposed to adhesive wearing where surface resistance was examined by the weight loss. Influence of particular elements on the welds chemical composition was examined by EDX analyzes. .
3 citations
References
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TL;DR: In this article, the state of the art in selective laser sintering/melting (SLS/SLM) processing of aluminium powders is reviewed from different perspectives, including powder metallurgy (P/M), pulsed electric current (PECS), and laser welding of aluminium alloys.
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TL;DR: In this article, the fundamental understanding of structure-properties relationship in automotive steels resistance spot welds is discussed. And a brief review of friction stir spot welding, as an alternative to RSW, is also included.
Abstract: Spot welding, particularly resistance spot welding (RSW), is a critical joining process in automotive industry. The development of advanced high strength steels for applications in automotive industry is accompanied with a challenge to better understand the physical and mechanical metallurgy of these materials during RSW. The present paper critically reviews the fundamental understanding of structure–properties relationship in automotive steels resistance spot welds. The focus is on the metallurgical characteristics, hardness–microstructure correlation, interfacial to pullout failure mode transition and mechanical performance of steel resistance spot welds under quasi-static, fatigue and impact loading conditions. A brief review of friction stir spot welding, as an alternative to RSW, is also included.
369 citations
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