Microstructure, crystallographic texture and strain hardening behavior in hot tensile tests of UNS S32304 Lean Duplex stainless steel

Moura, Ariane Neves de; Neto, Carlos Alberto Rosa; Castro, Nicolau Apoena; Vieira, Estéfano Aparecido; Orlando, M. T. D.

doi:10.1016/j.jmrt.2021.03.023

Cited by 17 publications

(8 citation statements)

References 65 publications

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“…The KAM ave values of the Al0/Al0, Al0/Al0.75, and Al0.75/Al0.75 weld beads were 0.04154 °, 0.05214 °, and 0.06410 °, respectively. Based on Equation (1) [24,25], the KAM ave can be used to quantitatively calculate the geometrically necessary dislocations density ( ρ GND ). where μ is the step size (4 μm), and b is the Burgers vector (2.35 × 10 −10 ) [26].…”

Section: Resultsmentioning

confidence: 99%

Laser welding of FeCoCrNiMnAl_x (x = 0, 0.75) high-entropy alloys fabricated by additive manufacturing

Shan

Wang

Cai

et al. 2022

Materials Science and Technology

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In the present study, the laser melting deposition (LMD) technology was adopted to fabricate FeCoCrNiMn and FeCoCrNiMnAl0.75 high entropy alloys (HEAs). Then, laser welding method was used to join the HEAs in forms of similar (FeCoCrNiMnAl/FeCoCrNiMnAl and FeCoCrNiMnAl0.75/FeCoCrNiMnAl0.75) and dissimilar (FeCoCrNiMnAl0/FeCoCrNiMnAl0.75) combinations, respectively. Ultra-depth field microscope and electron backscatter diffraction detection were used to observe the macro-morphology and microstructure, respectively. It was found that the width of the weld bead and heat-affected zone with higher aluminium content was larger. In both base metals and welded joints, aluminium promoted the face-centered cubic (FCC) phase transfer into body-centered cubic (BCC), significantly refined the grain and the dislocation density of HEA is also increased, which increased strength and hardness, and decreased ductility. Highlights The FeCoCrNiMn/FeCoCrNiMn, FeCoCrNiMn/FeCoCrNiMnAl0.75, FeCoCrNiMnAl0.75/FeCoCrNiMnAl0.75 joints were produced by laser welding. The widths of the weld bead and heat-affected zone increased with higher Al content. The weld bead with higher content of Al exhibited higher strength and hardness, but lower ductility.

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Section: Resultsmentioning

confidence: 99%

Laser welding of FeCoCrNiMnAl_x (x = 0, 0.75) high-entropy alloys fabricated by additive manufacturing

Shan

Wang

Cai

et al. 2022

Materials Science and Technology

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“…As temperature decreases and strain rate increases, strain hardening increases. This is due to the emergence of crystal defects, mainly dislocations, strain-induced stages, or twin boundaries through plastic deformation [ 190 , 191 , 192 ]. Both the strain strength coefficient and strain-hardening index rise very quickly in the initial strain, followed by a decrease and steady value at high strain rates [ 14 , 193 ].…”

Section: Discussion and Summarymentioning

confidence: 99%

On the Prediction of the Flow Behavior of Metals and Alloys at a Wide Range of Temperatures and Strain Rates Using Johnson–Cook and Modified Johnson–Cook-Based Models: A Review

et al. 2023

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This paper reviews the flow behavior and mathematical modeling of various metals and alloys at a wide range of temperatures and strain rates. Furthermore, it discusses the effects of strain rate and temperature on flow behavior. Johnson–Cook is a strong phenomenological model that has been used extensively for predictions of the flow behaviors of metals and alloys. It has been implemented in finite element software packages to optimize strain, strain rate, and temperature as well as to simulate real behaviors in severe conditions. Thus, this work will discuss and critically review the well-proven Johnson–Cook and modified Johnson–Cook-based models. The latest model modifications, along with their strengths and limitations, are introduced and compared. The coupling effect between flow parameters is also presented and discussed. The various methods and techniques used for the determination of model constants are highlighted and discussed. Finally, future research directions for the mathematical modeling of flow behavior are provided.

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“…2304 grade) are one of the most significant classes of stainless steels. [1][2][3] Their microstructure is made up of ferrite and austenite phases with equal volume fractions (roughly 50% vs. 50%). 1,2 These steels possess superior mechanical properties, such as high strength, proper elastic modulus between 180 and 200 GPa at 300°C, and good fracture toughness as well as excellent corrosion/corrosion-mechanical behavior due to their microstructure.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] Their microstructure is made up of ferrite and austenite phases with equal volume fractions (roughly 50% vs. 50%). 1,2 These steels possess superior mechanical properties, such as high strength, proper elastic modulus between 180 and 200 GPa at 300°C, and good fracture toughness as well as excellent corrosion/corrosion-mechanical behavior due to their microstructure. [4][5][6][7][8][9] The applications of duplex stainless steels can include important industries, such as automotive, naval, nuclear, oil, gas, petrochemical, pulp, and paper industries, as well as heat exchangers and subsea equipment.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7][8][9] The applications of duplex stainless steels can include important industries, such as automotive, naval, nuclear, oil, gas, petrochemical, pulp, and paper industries, as well as heat exchangers and subsea equipment. 2,6,8,10,11 Inconel 718, as a nickeland iron-based superalloy, is of high importance among high-temperature alloys and is a precipitate-hardenable alloy. [12][13][14][15] Its microstructure normally comprises nickelbased solid solution, such as γ phase (matrix), twins, and carbides.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and tensile-shear behavior of dissimilar resistance spot welds between 2304 duplex stainless steel and Inconel 718 superalloy

Badkoobeh

Mostaan

Rafiei

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Dissimilar joints between duplex stainless steels and nickel-based superalloys are of high significance in some industries. In this research, 2304 duplex stainless steel and Inconel 718 superalloy were welded by the resistance spot welding technique. The studies showed that the fusion zone microstructure was composed of a dendritic structure related to the grains of nickel-based solid solution ( γ-phase) and γ′ islands. The heat-affected zone microstructure of 2304 duplex stainless steel includes the austenite phase with a slight volume fraction and the ferrite phase with a high volume fraction. The austenite phase was formed with two morphologies of Widmanstätten and grain boundary allotriomorphs. The heat-affected zone microstructure of Inconel 718 superalloy also contained γ phase (nickel-based solid solution), annealing twins, and some precipitates. The results of the tensile-shear test revealed that tensile-shear strength (i.e. peak load) and fracture energy were increased by increasing the welding current from 1 to 2 kA and the welding time from 1 to 2 s. However, they were reduced by increasing the welding current from 2 to 4 kA and the welding time from 2 to 4 s. This was caused by the surface splash between the electrodes and the sheets. In the above-mentioned range, an increase in the welding current and time may also intensify the surface splash. It was also found that when the welding time was constant (i.e. 2 s), the spot weld obtained at the welding current of 1 kA failed by interfacial fracture mode. All spot welds obtained at the welding currents of 2, 3, and 4 kA failed by pull-out fracture mode. On the other hand, all spot welds associated with the welding times of 1, 2, 3, and 4 s failed by PF mode when the welding current was constant (i.e. 3 kA).

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Microstructure, crystallographic texture and strain hardening behavior in hot tensile tests of UNS S32304 Lean Duplex stainless steel

Cited by 17 publications

References 65 publications

Laser welding of FeCoCrNiMnAl_x (x = 0, 0.75) high-entropy alloys fabricated by additive manufacturing

Laser welding of FeCoCrNiMnAl_x (x = 0, 0.75) high-entropy alloys fabricated by additive manufacturing

On the Prediction of the Flow Behavior of Metals and Alloys at a Wide Range of Temperatures and Strain Rates Using Johnson–Cook and Modified Johnson–Cook-Based Models: A Review

Microstructure and tensile-shear behavior of dissimilar resistance spot welds between 2304 duplex stainless steel and Inconel 718 superalloy

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Microstructure, crystallographic texture and strain hardening behavior in hot tensile tests of UNS S32304 Lean Duplex stainless steel

Cited by 17 publications

References 65 publications

Laser welding of FeCoCrNiMnAlx (x = 0, 0.75) high-entropy alloys fabricated by additive manufacturing

Laser welding of FeCoCrNiMnAlx (x = 0, 0.75) high-entropy alloys fabricated by additive manufacturing

On the Prediction of the Flow Behavior of Metals and Alloys at a Wide Range of Temperatures and Strain Rates Using Johnson–Cook and Modified Johnson–Cook-Based Models: A Review

Microstructure and tensile-shear behavior of dissimilar resistance spot welds between 2304 duplex stainless steel and Inconel 718 superalloy

Contact Info

Product

Resources

About

Laser welding of FeCoCrNiMnAl_x (x = 0, 0.75) high-entropy alloys fabricated by additive manufacturing

Laser welding of FeCoCrNiMnAl_x (x = 0, 0.75) high-entropy alloys fabricated by additive manufacturing