Microstructure and texture evolution of duplex stainless steels with different molybdenum contents

Malta, Paula Oliveira; Dias, Filipi Leles da Costa; Souza, Ana Clara M. de; Santos, Dagoberto Brandão

doi:10.1016/j.matchar.2018.06.006

Cited by 24 publications

(17 citation statements)

References 84 publications

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“…It is well known that, for a given chemical composition, the mechanical properties of DSSs are primarily modified by microstructural parameters, such as the phase fraction and crystallographic texture of each phase. These microstructural parameters can be regulated by the processing conditions [10][11][12][13][14][15][16][17][18]. Due to the two-phase nature of these alloys and the distinct mechanical behaviour between austenite and ferrite, some damage and failure (edge cracks) may be induced during the processing of DSS components.…”

Section: Introductionmentioning

confidence: 99%

Novel Mechanical Characterization of Austenite and Ferrite Phases within Duplex Stainless Steel

Besharatloo

Carpio

Cabrera

et al. 2020

Metals

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The microstructure and micromechanical properties of the constitutive phases of a particular duplex stainless steel in various processing conditions have been characterized. Hardness (H), elastic modulus (E) and H/E cartography maps were obtained by using a high-speed nanoindentation mapping technique. Small-scale H and E evolution at different processing conditions has been investigated by statistical analysis of a large number of nanoindentations (10,000 imprints per sample). Two mechanically distinct phases, ferrite (α) and austenite (γ), were deconvoluted from this dataset using Ulm and Constantinides’ method, with the remaining values assigned to a third mechanical phase linked to composite-like (containing α/γ interphase boundaries) regions. These mechanical property phase assessments were supplemented by overlaying crystallographic phase maps obtained by electron backscattered diffraction. An excellent correlation between microstructure and small-scale mechanical properties was achieved, especially when considering the ratio H/E.

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Section: Introductionmentioning

confidence: 99%

Novel Mechanical Characterization of Austenite and Ferrite Phases within Duplex Stainless Steel

Besharatloo

Carpio

Cabrera

et al. 2020

Metals

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“…The flow stress-strain curve reflects the changes in the material through plastic deformation during dynamic loading [25,32,[62][63][64][65][66]. The flow stress can be influenced by several factors like chemical composition, crystal structure (e.g., steel matrix -bcc, fcc, Mg-base -hcp, and others) [50,67], different phases and compounds [17,30,50,[68][69][70], grain boundaries [25,50,71,72] as well as imperfections [34,50,55,73,74]. Other factors such as friction (σf), thermal (σt) and athermal (σa) terms also affect flow stresses, as indicative by relations in Eq.…”

Section: On Properties Derived From Flow Curves and Relation To Microstructuresmentioning

confidence: 99%

Plastic Deformation Behavior in Steels during Metal Forming Processes: A Review

Kumar¹,

Povoden-Karadeniz²

2021

Plastic Deformation in Materials [Working Title]

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The plastic deformation occurs in steels during metal forming processing such as rolling, forging, high-pressure torsion, etc. which modify mechanical properties of materials through the grain refinement, and the shape change of objects. Several phenomena in the scope of plastic deformation, such as hardening, recovery, and recrystallization are of great importance in designing thermomechanical processing. During the last decades, a focus of research groups has been devoted particularly to the field of metals processing of steel parts through plastic deformation combined with specific heat treatment conditions. In this review chapter, the current status of research work on the role of plastic deformation during manufacturing is illuminated.

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“…In the industrial sequence for obtaining duplex stainless-steel by rolling includes two annealing steps: one intermediate after the hot rolling and the final one after the cold rolling [51,52]. In most applications, the duplex structures are manufactured from hot-rolled and annealed sheets.…”

Section: Microhardness (Hv)mentioning

confidence: 99%

“…In most applications, the duplex structures are manufactured from hot-rolled and annealed sheets. For this reason, its crystallographic texture results from the phenomena of deformation, recrystallization and phase transformation that occur in the austenite and ferrite phases [52,53]. These higher values obtained for phase quantification for the material as received (in the form of sheets) could be related to the crystallographic texture obtained in the processing of the material.…”

Section: Microhardness (Hv)mentioning

confidence: 99%

A New Method to Recycle Stainless–Steel Duplex UNS S31803 Chips

Claudiney

Oliveira

Sachs

et al. 2018

Metals

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Due to the increased consumption of raw materials, energy, and the waste it generates, recycling has become very important and fundamental for the environment and the industrial sector. The production of duplex stainless-steel powders with the addition of vanadium carbide in the high energy mechanical milling process is a new method for recycling materials for the manufacture of components in the industrial sector. This study aims to reuse the chips from the duplex stainless-steel UNS S31803 by powder metallurgy with the addition of Vanadium carbide (VC). The mechanical milling was performed using a planetary ball mill for 50 h at a milling speed of 350 rpm and a ball-to-powder weight ratio of 20:1, and the addition of 3 wt % of VC. The material submitted to milling with an addition of carbide has a particle size of less than 140 µm. After milling, the sample went through a stress relief treatment performed at 1050 • C for 1 h and the isostatic compaction process loaded with 300 MPa. The sintered powders and material was characterized by scanning electron microscopy, X-ray diffraction, and micro-hardness tests. The milling process with an addition of 3% VC produced a particle size smaller than the initial chip size. The measurement of micrometric sizes obtained was between 26 and 132 µm. The sintered material had a measurement of porosity evaluated at 15%. The obtained density of the material was 84% compared to the initial density of the material as stainless-steel duplex UNS S31803. The value of the microhardness measurement was 232 HV. The material submitted for grinding presented the formation of a martensitic structure and after the thermal treatment, the presence of ferrite and austenite phases was observed. Thus, in conclusion, this study demonstrates the efficacy in the production of a metal-ceramic composite using a new method to recycle stainless-steel duplex UNS S31803 chips.

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Microstructure and texture evolution of duplex stainless steels with different molybdenum contents

Cited by 24 publications

References 84 publications

Novel Mechanical Characterization of Austenite and Ferrite Phases within Duplex Stainless Steel

Novel Mechanical Characterization of Austenite and Ferrite Phases within Duplex Stainless Steel

Plastic Deformation Behavior in Steels during Metal Forming Processes: A Review

A New Method to Recycle Stainless–Steel Duplex UNS S31803 Chips

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