Corrosion behaviors of the iron-based and Ni-based brazing filler metals brazed on the stainless steels in a solution of 3.5MASS% NaCl

<p class="AMSmaintext"><span lang="EN-GB">The corrosion resistance was studied electrochemically for an iron-based brazing filler metal F300 and a Ni-based brazing filler metal Ni613. Both austenitic stainless steel SUS316 and ferritic stainless steel SUS444 were used as base metals for these brazing filling metals. F300 showed a higher corrosion rate than those of Ni613 and both base metals and was less corrosion-resistive. While Ni613 showed a stronger depression effect of an anodic reaction than those of base metals, F300 showed little depression effect of the reaction. As an Fe-Ni phase dissolved preferentially in F300 and a finite laminated corrosive morphology was observed, the corrosion progression along a depth direction was suggested. These corrosion behaviors depend on the difference of chemical composition of these brazing filler metals.</span></p>

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Computer Simulation of Wetting and Flowing Behaviors of Filler Metal during Laser Brazing Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.580-582.271 ◽

2008 ◽

Vol 580-582 ◽

pp. 271-274 ◽

Cited By ~ 5

Author(s):

Kazuyoshi Saida ◽

Woo Hyun Song ◽

Kazutoshi Nishimoto

Keyword(s):

Computer Simulation ◽

Stainless Steel ◽

Filler Metal ◽

Butt Joint ◽

304 Stainless Steel ◽

Base Metals ◽

Laser Brazing ◽

Cu Substrate ◽

Single Beam ◽

Joint Gap

The wetting and flowing behaviors of the filler metal during laser brazing process were analyzed by the computer simulation. Two situations of the wetting and flowing during laser brazing were modelled, i.e., the metled Au-18%Ni and Ag-10%Pd filler metals on the butt joint of Inconel 600, and the melted Cu-8%Sn filler metal on the dissimilar butt joint of type 304 stainless steel to Cu. The filler metal droplet wetted and spread on the base metals and simultaneously infiltrated into the joint gap with the lapse of time. The Au-Ni and Ag-Pd filler metal infiltrated into the 0.3mm wide joint gap at the completion of brazing even in the single beam brazing. The Au-Ni filler metal did not infiltrate into the joint gap completely at the brazing clearances of 0.1-0.2mm in the single beam brazing, however, it could be filled up in the joint gap in the tandem beam brazing. The Cu-Sn filler metal wetted on the both base metals of stainless steel and Cu and filled up the 0.3mm wide joint gap when the location of preheating beam deviated in 0.5mm to Cu substrate, however, it did not infiltrate into the joint gap completely at the deviation distance of preheating beam to Cu substrate being 1.0mm. It followed that the wetting and flowing behaviors of the filler metal during laser brazing process could be predicted by the computer simulation.

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The effect of filler metal and butter layer on microstructural and mechanical properties of pure Cu to AISI304 stainless steel dissimilar joint

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/1464420718796042 ◽

2018 ◽

Vol 233 (9) ◽

pp. 1894-1905 ◽

Cited By ~ 1

Author(s):

M Rafiei ◽

H Mostaan

Keyword(s):

Stainless Steel ◽

Electron Microscope ◽

Scanning Electron Microscope ◽

Heat Affected Zone ◽

Filler Metal ◽

Welding Process ◽

Dissimilar Joint ◽

Pure Cu ◽

Filler Metals ◽

Scanning Electron

In this research, dissimilar joint properties of pure Cu to AISI304 stainless steel using three different filler metals were studied. In this regard, the welding process was done with gas tungsten arc welding process using ER308L, ER309L, and ERNiCrMo3 filler metals and ERNi1 butter layer. The microstructural evaluations were carried out using optical microscope and scanning electron microscope. The mechanical tests were conducted by microhardness, tensile, bending and impact tests, and the fracture surfaces of impact and tensile tests were studied by scanning electron microscope. The results show that there is no crack or discontinuity in the welded samples. Energy-dispersive spectroscopy analysis revealed that the diffusion of Cu from base metal to butter layer has been occurred during welding. The microhardness profiles indicated the increase of hardness in heat-affected zone and butter layer. The welded sample with ERNiCrMo3 filler metal showed higher microhardness (200 HV) as compared with two other welded samples. The welded sample with ER309L filler metal had lower microhardness of about 150 HV. The tensile test revealed that the welded sample with ER309L filler metal showed maximum (193 MPa) and the welded sample with ER308L showed minimum (147 MPa) of ultimate tensile strength. In bending test of the welded samples with ER308L and ERNiCrMo3 filler metals, the crack and discontinuity were revealed in weld metal and heat-affected zone of Cu, respectively, while in the welded sample with ER309L filler metal no crack and discontinuity were seen. Also the welded sample with ER309L filler metal had highest impact energy of about 90 J as compared to other samples (81 and 88 J for the welded samples with ER308L and ERNiCrMo3 filler metals, respectively). The welded sample with ER309L filler metal showed more ductile fracture surface as compared with other samples.

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Study on Microstructure and Properties of 12Ag–Cu–Zn–Sn Cadmium-Free Filler Metals with Trace in Addition

Crystals ◽

10.3390/cryst11050557 ◽

2021 ◽

Vol 11 (5) ◽

pp. 557

Author(s):

Jie Wu ◽

Songbai Xue ◽

Zhen Yao ◽

Weimin Long

Keyword(s):

Stainless Steel ◽

Filler Metal ◽

304 Stainless Steel ◽

Scanning Electron Microscopy Examination ◽

Melting Characteristics ◽

Saving Effect ◽

Filler Metals ◽

Microscopy Examination ◽

Liquidus Temperatures ◽

Strength Effect

The effect of different In contents on the melting characteristics, mechanical properties, and microstructure of 12Ag–Cu–Zn–Sn filler metal was investigated in this paper, and flame brazing of 304 stainless steel and copper plates was done using the 12Ag–Cu–Zn–Sn–xIn filler metal. The results indicate that adding appropriate amount of In can evidently decrease the solidus and liquidus temperatures and improve the wettability of the low silver based filler metals. In addition, the shear strength of 304 stainless steel and copper plates joint brazed by 12Ag–Cu–Zn–Sn–1In are satisfactory due to the solution strength effect, and scanning electron microscopy examination of the braze-zone revealed that more relatively sound joints were obtained when brazing was done with 12Ag–Cu–Zn–Sn–xIn filler metal than with Indium free one; its performance is comparable to that of the joint brazed with the 20Ag–Cu–Zn–Sn filler metal, having a remarkable silver-saving effect.

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Solidification Cracking Susceptibility of Alloy 52 Weld Overlay on 316L Stainless Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.704-705.529 ◽

2011 ◽

Vol 704-705 ◽

pp. 529-534

Author(s):

Wei Chih Chung ◽

Lv Wen Tsay ◽

Chun Chen

Keyword(s):

Stainless Steel ◽

Heat Input ◽

Nuclear Power ◽

Filler Metal ◽

Solidification Cracking ◽

Weld Overlay ◽

Overlay Welding ◽

Solidification Cracks ◽

Filler Metals ◽

Weld Overlays

Nickel-based filler metals are widely used in the nuclear power industry for overlay welding of austenitic stainless steel components. However, solidification cracking in the weld metal has been observed in a number of cases after the initial deposit of Alloy 52 filler metal on the 316L substrate. In this study, Alloy 52 and its 52M modification were employed to perform overlay welding on 316L specimens. With proper welding heat input, no solidification cracks were observed in the transition zone of both weld overlays. As the heat input increased, solidification cracks could be found in the welds but was found to a lesser extent in Alloy 52M overlays. Nevertheless, such cracks could be eliminated by applying 309L filler metal as a buffer. This could be related to lower S and P contents in the buffer layer to reduce solidification cracking susceptibility of the subsequent weld passes. Additionally, the results of spot Varestraint tests also indicated that Alloy 52M had better solidification and ductility-dip cracking resistances than Alloy 52.

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EFFECT OF FILLER METALS ON THE MECHANICAL PROPERTIES OF DISSIMILAR WELDING OF STAINLESS STEEL 316L AND CARBON STEEL A516 GR 70

Jurnal Teknologi ◽

10.11113/jt.v75.5174 ◽

2015 ◽

Vol 75 (7) ◽

Cited By ~ 1

Author(s):

Abdollah Bahador ◽

Esah Hamzah ◽

Mohd Fauzi Mamat

Keyword(s):

Tensile Strength ◽

Stainless Steel ◽

Carbon Steel ◽

Weld Metal ◽

Dissimilar Welding ◽

Hardness Profile ◽

Base Metals ◽

Stainless Steel 316L ◽

Sharp Drop ◽

Filler Metals

This paper describes an investigation on the effect of using three different filler metals to weld two dissimilar metals namely, stainless steel 316L and low alloy carbon steel A516 gr 70. Manual Gas Tungsten Arc welding (GTAW) with three filler metals including ER 80S-Ni1, ER309L, ER NiCrMo-3 were selected to weld the two metals. Radiography and penetrant tests were performed on the welded metals to ensure the surface and internal soundness of the welds based on the tensile tests results, all the specimens failed at the carbon steel A516 gr 70 base metals with fully ductile fracture mode (cup and cone). Welded samples using Inconel 615 filler metal has the highest strength of 512 MPa while other samples show almost similar strength of 481 and 487 MPa. The tensile strength of all the welded samples is found to be in between the tensile strength of the base metals. Micro-hardness test showed that ER80S-Ni1weld has the highest hardness, meanwhile hardness profile of ER309L presented a sharp drop in the stainless steel side and ER NiCrMo-3 weld metal illustrated hardness above the two base metals with fewer variations across the weld metal.

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Influences of Groove Angles and Filler Metals on 304L Stainless Steel to AISI 1040 Carbon Steel Dissimilar Joint by Gas Tungsten Arc Welding

E3S Web of Conferences ◽

10.1051/e3sconf/201913001008 ◽

2019 ◽

Vol 130 ◽

pp. 01008

Author(s):

Eriek Wahyu Restu Widodo ◽

Vuri Ayu Setyowati ◽

Suheni ◽

Ahmad Rilo Hardianto

Keyword(s):

Tensile Strength ◽

Stainless Steel ◽

Carbon Steel ◽

Pressure Vessel ◽

Arc Welding ◽

Filler Metal ◽

Gas Tungsten Arc Welding ◽

304L Stainless Steel ◽

Gas Tungsten Arc ◽

Filler Metals

Dissimilar joint commonly applied on pressure vessel application in power plan field as joining between the tank and the stanchion of pressure vessel. This paper presents the investigations carried out to study the influence of groove angles and filler metals on 304L Stainless Steel to AISI 1040 Carbon Steel dissimilar joints. Gas Tungsten Arc Welding with 120 A of current was used on this research, joined the two different metals. The 30°, 45°, and 60° were used in this welding as parameters of V-groove angles. ER 308L-16 filler metal of stainless steel and ER 70S-6 filler metal of carbon steel were used as filler metals. Tensile test was conducted to obtain tensile strength of joint and to analysis of the effect of the welding parameters to the mechanical properties. The highest tensile strength was obtained from the 60° groove angle using ER 308L-16 filler metal of 614.54 MPa. In the other hand, 45° groove angle using ER 70S-6 filler metal obtained the lowest tensile strength of 578.66 MPa. The joining process of dissimilar welding using ER 308L-16 filler metal, filler metal for stainless steel, has obtained the highest tensile strength with wider groove angle as well.

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Characteristics comparison of weld metal zones welded to cast and forged steels for piston crown material

Modern Physics Letters B ◽

10.1142/s0217984915400497 ◽

2015 ◽

Vol 29 (06n07) ◽

pp. 1540049

Author(s):

Kyung-Man Moon ◽

Yun-Hae Kim ◽

Myeong-Hoon Lee ◽

Tae-Sil Baek

Keyword(s):

Corrosion Resistance ◽

Weld Metal ◽

Filler Metal ◽

Point Of View ◽

The Other ◽

Inconel 625 ◽

Chemical Components ◽

Base Metals ◽

Piston Crown ◽

Filler Metals

An optimum repair welding for the piston crown which is one of the engine parts exposed to the combustion chamber is considered to be very important to prolong the engine lifetime from an economical point of view. In this study, two types of filler metals such as 1.25 Cr –0.5 Mo , 0.5 Mo were welded with SMAW method and the other two types of filler metals such as Inconel 625 and 718 were welded with GTAW method, respectively, and the used base metals were the cast and forged steels of the piston crown material. The weld metal zones welded with Inconel 625 and 718 filler metals exhibited higher corrosion resistance compared to 1.25 Cr –0.5 Mo and 0.5 Mo filler metals. In particular, the weld metal zone welded with Inconel 718 and 0.5 Mo , filler metals indicated the best and worst corrosion resistance, respectively. Consequently, it is suggested that the corrosion resistance of the weld metal zone surely depends on the chemical components of each filler metal and welding method irrespective of the types of piston crown material.

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Effect of In and Pr on the Microstructure and Properties of Low-Silver Filler Metal

Crystals ◽

10.3390/cryst11080929 ◽

2021 ◽

Vol 11 (8) ◽

pp. 929

Author(s):

Jie Wu ◽

Songbai Xue ◽

Peng Zhang

Keyword(s):

Mechanical Properties ◽

Stainless Steel ◽

Melting Temperature ◽

Filler Metal ◽

304 Stainless Steel ◽

The Novel ◽

Spreading Area ◽

Brazed Joint ◽

Filler Metals ◽

Liquidus Temperatures

The novel low-silver 12AgCuZnSn filler metals containing In and Pr were used for flame brazing of copper and 304 stainless steel in this study. The effects of In and Pr content on the melting temperature, wettability, mechanical properties and microstructure of 12AgCuZnSn filler metal were analyzed. The results indicate that the solidus and liquidus temperatures of filler metals decrease with the addition of In. Trace amounts of Pr have little impact on the melting temperature of the low-silver filler metals. In addition, the spreading area of filler metals on copper and 304 stainless steel is improved. The highest shear strength of brazed joint is 427 MPa when the content of In and Pr are 2 wt.% and 0.15 wt.%, respectively. Moreover, it is observed that the trace amount of Pr significantly refines the microstructure of brazed joint matrix. A bright Pr3Cu4Sn4 phase is found in filler metal and brazing seam when the contents of In and Pr are 5 wt.% and 0.5 wt.%, respectively.

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Corrosion behaviors of 316LN stainless steel joints brazed with Sn-plated silver filler metals

International Journal of Modern Physics B ◽

10.1142/s0217979218501989 ◽

2018 ◽

Vol 32 (16) ◽

pp. 1850198 ◽

Cited By ~ 2

Author(s):

Xingxing Wang ◽

Shuai Li ◽

Jin Peng

Keyword(s):

Stainless Steel ◽

Base Metal ◽

Galvanic Corrosion ◽

Oxalic Acid Solution ◽

Local Corrosion ◽

316Ln Stainless Steel ◽

Electrolytic Etching ◽

Brazed Joints ◽

Corrosion Behaviors ◽

Filler Metals

AgCuZnSn filler metals were prepared from the BAg34CuZnSn filler metal by a combinative process of brush plating and thermal diffusion, and the prepared filler metals were applied to the induction brazing of the 316LN stainless steel. The corrosion behaviors of the brazed joints was evaluated based on local corrosion analyses, where the morphology of the joints was analyzed by scanning electron microscopy (SEM) after immersion in a 3.5 wt.% NaCl aqueous solution and electrolytic etching in a 10 vol.% oxalic acid solution. The microstructure of the brazed joints with the Sn-plated filler mainly consisted of the Ag phase, Cu phase, CuZn phase, Cu5Zn8 phase, Cu[Formula: see text]Sn[Formula: see text] phase and Ag3Sn phase. The local corrosion analysis results indicated that galvanic corrosion occurred near the interface between the stainless steel base metal and the brazing seam. With increasing local corrosion time, the corrosion rates of both the brazing seam and the base metal first exhibited an increasing trend, followed by a decreasing trend, and the corrosion rate of the brazing seam was slightly greater than that of the base metal. The corrosion behaviors analysis indicated that the corrosion resistance of the brazing seam was reduced, and concave defects emerged after electrolytic etching for 90 s.

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