Effect of MAG welding transfer mode on sigma phase precipitation and corrosion performance of 316L stainless steel multi-pass welds

Guilherme, Luis Henrique; Benedetti, Assis Vicente; Fugivara, Cecilio Sadao; Magnabosco, Rodrigo; Oliveira, Marcelo Falção de

doi:10.1016/j.jmrt.2020.07.039

Cited by 31 publications

(10 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This experimental investigation considered the industrial surface finish that is related to the average roughness of 0.76 micron (equivalent to 240 grinding paper) and reduced exposed surface area through using an electrochemical minicell. The literature has normally applied a higher polishing procedure and a larger exposed surface area, and as a result these differences can changes the electrochemical parameters 8,[29][30][31] . In spite of the difference between the tests procedure, a similar result to the electrochemical parameters of the AISI 316L base metal was observed when compared the literature data 32,33 with the previous studies of this research team in industrial measurements 19 .…”

Section: Resultsmentioning

confidence: 99%

Passivation Level of AISI 316L Aseptic Tank Surface Quantified by On-Site Electrochemical Techniques

Guilherme¹,

Benedetti

Fugivara

et al. 2022

Mat. Res.

View full text Add to dashboard Cite

Frequently stainless steel AISI 316L aseptic tanks have their passivity and corrosion resistance properties degraded by biofilm formation and localized corrosion processes. Thereby, maintenance projects are performed to repair the surface in food-grade product contact to obtain an aseptic property as defined by ASME BPE. However, the on-site non-destructive testing are limited to the liquid penetrant examination and the average roughness measurement. The on-site open circuit potential and on-site cyclic polarization measurements were conducted using a portable electrochemical minicell. The level of passivation was quantified on the tank surface, and it was performed before and after the repairing maintenance protocol be made. The results of the on-site electrochemical measurements showed a clear difference between as-degraded and repaired surfaces, indicating a sensible response to aseptic surface inspection. The on-site open circuit potential together with the on-site cyclic polarization were considered an advanced tool to support the maintenance projects of the AISI 316L aseptic surfaces.

show abstract

Section: Resultsmentioning

confidence: 99%

Passivation Level of AISI 316L Aseptic Tank Surface Quantified by On-Site Electrochemical Techniques

Guilherme¹,

Benedetti

Fugivara

et al. 2022

Mat. Res.

View full text Add to dashboard Cite

show abstract

“…Furthermore, the other phases, such as the sigma, chromium carbide, and chromium nitride, may occur during equilibrium cooling conditions or long-time heat exposure. The phase heterogeneity in SS 316L promotes the corrosion of the stainless steel [6][7][8]. The corrosion triggers the release of elements such as Fe, Cr, Ni, and other alloy contents.…”

Section: Surface Morphology and Chemical Analysis Of The Latticementioning

confidence: 99%

“…However, the bulk SS316L has much higher density and stiffness than the bone tissue of ribs, which may cause adverse effects such as bone deterioration [5]. Another challenge that may cause the failure of SS316L implant is the potential possibility for secondary phases or precipitation phases in material to occur during implant fabrication or working conditions [6,7]. The precipitates lead to localized corrosion of the SS316L when subjected to human body fluids and release unused elements that may become toxic inside the human body [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Selective Laser Melting of Stainless Steel 316L with Face-Centered-Cubic-Based Lattice Structures to Produce Rib Implants

2021

View full text Add to dashboard Cite

Selective laser melting has a great potential to manufacture biocompatible metal alloy scaffolds or implants with a regulated porosity structure. This study uses five face-centered cubic (FCC) lattice structures, including FCC, FCC-Z, S-FCC, S-FCC-Z, and FCC-XYZ. Specimens with different lattice structures are fabricated using two laser energy densities, 71 J/mm3 and 125 J/mm3. Density, tensile, compressive and flexural test results exhibit the effect of laser parameters and lattice structure geometries on mechanical properties. The higher laser energy density of 125 J/mm3 results in higher properties such as density, strength, and Young’s modulus than the laser energy density of 71 J/mm3. The S-FCC lattice has the lowest density among all lattices. The mechanical tests result show specimen with FCC-XYZ lattice structures fabricated using a laser energy density of 125 J/mm3 meet the tensile properties requirement for human ribs. This structure also meets the requirement in flexural strength performance, but its stiffness is over that of human ribs. The compression test results of lattices are still incomparable due to unavailable compression data of the human ribs. In short, The FCC-XYZ lattice design fabricated by the 125 J/mm3 laser energy density parameter can be used to manufacture customized rib implants.

show abstract

“…Among the welding methods, the most commons in the industrial sector are Metal Active Gas (MAG) for steel (Guilherme et al, 2020) and Tungsten Inert Gas (TIG) for stainless steel and aluminium alloys (ASM, 1993;Bansal et al, 2020). That processes when the welding starts, the heat source is focus in a region where the materials are locally casting and joint (Wang et al, 2020), consequently, this local heat creates nonuniform thermal cycles in the materials (Darmadi et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Thermal evaluation of MAG/TIG welding using numerical extension tool

Marques

Pereira²,

Ribeiro³

2021

Int. J. Appl. Sci. Eng.

View full text Add to dashboard Cite

The manufacturing processes involving thermal transitions have been more used in industries nowadays, being the welding one of the most widely used. The requirement to design and predict adverse conditions are fundamental to the development of any mechanical project. As a result, the market needs have motivated the companies to find faster and more effective solutions, being one of a recent tools an ACT (Ansys Customization Toolkit) called "Moving Heat Source", in which is executed the Gaussian heat source to model welding and laser processes. Based on this, the present work proposes to evaluate the accuracy of that extension implementing a finite element model for the MAG/TIG welding processes in DINCK20 steel and Al6082-T6 aluminium alloy, comparing with one of the first mathematical model proposed by the literature (Rosenthal) and with a recent analytical method of high precision already validated experimentally. The results showed a smaller global error for MAG process (3~10%) when compared to TIG (15~18%) and, the temperatures measured on the surface of the plate presented errors lower than the bottom in both alloys.

show abstract

Effect of MAG welding transfer mode on sigma phase precipitation and corrosion performance of 316L stainless steel multi-pass welds

Cited by 31 publications

References 41 publications

Passivation Level of AISI 316L Aseptic Tank Surface Quantified by On-Site Electrochemical Techniques

Passivation Level of AISI 316L Aseptic Tank Surface Quantified by On-Site Electrochemical Techniques

Selective Laser Melting of Stainless Steel 316L with Face-Centered-Cubic-Based Lattice Structures to Produce Rib Implants

Thermal evaluation of MAG/TIG welding using numerical extension tool

Contact Info

Product

Resources

About