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 article, in-situ measurements of heat transfer conditions were taken for welding and additive manufacturing with reference to spatial and temporal variations in heat transfer, and the results showed that there is a synergy between additive manufacturing and welding.
Abstract: There is a synergy between welding and additive manufacturing with reference to spatial and temporal variations of heat transfer. In this research, in-situ measurements of heat transfer conditions ...
8 citations
TL;DR: In this article, the welding direction dependence on the rolling direction was investigated for a welded DP1000, a sheet made from a gas metal arc welding (GMAW) process.
Abstract: Since gas metal arc welding (GMAW) is a common procedure to join different sheets in the industry, the welding direction dependence on the rolling direction was investigated for a welded DP1000, a ...
8 citations
Cites background from "Welding Metallurgy of"
...The allotriomorphic Ferrite nucleates at the grain boundaries of Austenite and grows in a planar manner at high temperatures (Kou, 2003)....
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TL;DR: In this article, the presence of TiO2 nanoparticle-based activated flux combined with orbital welding of seamless thick-walled pipes of stainless steel and lowcycle pulse current was done, representing a novel combination of welding processes parameters.
Abstract: In this work, the presence of TiO2 nanoparticle-based activated flux combined with orbital welding of seamless thick-walled pipes of stainless steel and lowcycle pulse current was done, representing a novel combination of welding processes parameters. Control specimens were welded without flux and consumable material, and without flux with the consumable material. Experimental welding with different welding parameters was done. Special attention was given to characterize the flux by zetasizer method, representing a new approach, versus the conventional approach where the nominal oxide particle size is reported. The obtained welds were visually tested, macroanalyzed, their microstructures examined, and their tensile and bending properties determined. The results show that the flux influences a significant increase in penetration depth, up to full penetration, which has a positive effect on the increase in the tensile and bending properties of the weld metal. Material behavior model was developed, based on microstructural features of the near weld-line. Without the flux, grain enlargement occurred near the surface, while with flux, it occurred under the weld, which can be attributed to recrystallization and a reversed Marangoni convection.
8 citations
Cites background from "Welding Metallurgy of"
...As a result, this process offers a low cost and is time-saving [10-17]....
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TL;DR: In this paper, a new relationship between the corrosion resistance and the microstructure characteristic of the SCSP hybrid weld was established, which suggests better weld corrosion resistance than the BM is obtained when the [Cr]E≥ 15.5 percent.
Abstract: Superior weld corrosion resistance to base metal (BM) of stainless clad steel plate (SCSP) was achieved by laser-arc hybrid welding with only one pass. Under optimized parameters, the charge transfer resistance of the weld reached 2.3 times higher than the BM, and the corrosion current density decreased to 70 pct of the BM. Considering the inhomogeneity caused by dendrites, an equivalent Cr content, i.e., [Cr]E, was proposed to establish a new relationship between the corrosion resistance and the microstructure characteristic of the SCSP hybrid weld. It suggests better weld corrosion resistance than the BM is obtained when the [Cr]E ≥ 15.5 pct. The results would be suitable to predict the corrosion resistance of the SCSP weld, and promote its industrial application.
8 citations
Cites background from "Welding Metallurgy of"
...On the other hand, more wires are added into the molten pool, which accelerates the heterogeneous nucleation, and promotes the growth of cellular grains but suppresses the growth of dendrites.([21]) These combined effects cause the little variation of the fraction of dendrites with increasing wire filling rate....
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...According to welding metallurgy theories,([21]) increasing laser power increases the heat input into the molten pool, and therefore, decreases the temperature gradient and slows the cooling rate....
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02 Sep 2013
TL;DR: In this article, the influence of welding heat input on the microstructure, hardness, ultimate tensile strength and toughness of submerged arc welding of plain carbon steel was investigated, and an attempt was made to investigate the effect of welding temperature input on carbon steel microstructures.
Abstract: This article investigates the influence of welding heat input on the microstructure, hardness, ultimate tensile strength and toughness of submerged arc welding of plain carbon steel. An attempt was...
8 citations
Cites background from "Welding Metallurgy of"
...Submerged arc welding (SAW) process is widely used in the nuclear plant, power generation, shipbuilding, offshore and construction industries due to its inherent advantages of deep penetration, smooth bead, superior quality and high efficiency.(1,2) It is well known that high efficiency and high quality are the developing targets of welding technology....
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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.
1,172 citations
TL;DR: In this article, the authors show that the pre-existing dislocation network, which maintains its configuration during the entire plastic deformation, is an ideal modulator that is able to slow down but not entirely block the dislocation motion.
557 citations
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
TL;DR: In this article, a unified equation to compute the energy density is proposed to compare works performed with distinct equipment and experimental conditions, covering the major process parameters: power, travel speed, heat source dimension, hatch distance, deposited layer thickness and material grain size.
369 citations
TL;DR: This study attempted to predict solidification defects by DNN regression with a small dataset that contains 487 data points and found that a pre-trained and fine-tuned DNN shows better generalization performance over shallow neural network, support vector machine, and DNN trained by conventional methods.
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