Strain hardening behavior and microstructural evolution during plastic deformation of dual phase, non-grain oriented electrical and AISI 304 steels

Soares, Guilherme Corrêa; Gonzalez, Berenice Mendonça; Santos, Leandro de Arruda

doi:10.1016/j.msea.2016.12.094

Cited by 34 publications

(16 citation statements)

References 30 publications

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“…For this reason, considering the previous discussions, the stage I, in this case, is associated with mobile dislocation interaction and dynamic softening in austenite, which tend to be the dominant hardening mechanisms in this phase at lower deformation levels . At the end of this stage, before the change in the curve inclination, some ε‐martensite may be formed .…”

Section: Discussionmentioning

confidence: 76%

“…Studies done by Guo et al ,. Soares et al., and De et al . revealed that the reduction in the work hardening rate decay can be associated with α′‐martensite formation in the microstructure with the progress of deformation.…”

Section: Discussionmentioning

confidence: 99%

“…In low‐SFE alloys, ε‐martensite forms at the beginning of plastic deformation, but only when a minimum value of stress, capable of offering ideal conditions for the transformation, is reached . With the increase of the straining level, ε‐martensite tends to transform into α′‐martensite, acting as a precursor of this phase . In fact, Breda et al .…”

Section: Discussionmentioning

confidence: 99%

“…The partial transformation of γ into α′ is important for the work hardening behavior of the material once it promotes a delay of necking during tensile tests. Eventually, the martensite fraction reaches a saturation level, and d σ /d ε decreases again …”

Section: Discussionmentioning

confidence: 99%

“…Final stages that present a curve decay with increasing deformation, but before the beginning of necking, have been associated with the occurrence of a dynamic recovery process and highly dense dislocation walls. Therefore, previous deformation mechanisms that govern the hardening of the material are less active in this stage …”

Section: Discussionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of Warm Rolling and Annealing on Microstructure, Texture, and Mechanical Properties of a 2205 Duplex Stainless Steel

Tavares

Rodrigues

Santos

2020

steel research int.

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The effect of warm rolling and annealing processes on the microstructure, microtexture, and mechanical properties of a 2205 duplex stainless steel is investigated in this work. To evaluate the microstructure, scanning (SEM) and transmission electron microscopy (TEM) and electron backscatter diffraction are used as the main techniques. The mechanical properties are assessed through tensile tests. A transition from a bamboo type into a pearl structure is observed as the thickness reduction increases. Furthermore, the ferrite phase presents a weakening of the α‐fiber (<011>//rolling direction, RD) and a development of γ‐fiber (<111>//normal direction, ND), whereas the austenite has a reduction in the intensity of the {110}<112> brass component and a strengthening of the {110}<001> Goss and {112}<111> copper components. Multistage work hardening behavior is observed by Jaoul–Crussard analysis, which indicates the presence of secondary deformation mechanisms during the plastic deformation of the steel. Post‐deformation SEM and TEM results reveal the formation of α′ and ε‐martensite at deformed regions. The orientation relationship that develops between γ‐ and ε‐martensite is Shoji–Nishiyama (S–N) <110>γ//<2110>ε.

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of Warm Rolling and Annealing on Microstructure, Texture, and Mechanical Properties of a 2205 Duplex Stainless Steel

Tavares

Rodrigues

Santos

2020

steel research int.

View full text Add to dashboard Cite

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The Correlation Between the Microstructural Parameters and Mechanical Properties of Reduced Activation Ferritic–Martensitic (RAFM) Steel: Influence of Roll Deformation and Medium Temperature Tempering

Mao

Liu

et al. 2020

Metall Mater Trans A

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Strain Rate Dependent Ductility and Strain Hardening in Q&P Steels

Finfrock

Thrun

Bhattacharya

et al. 2021

Metall Mater Trans A

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Due to their high strength, formability and affordable cost, quenched and partitioned (Q&P) steels have shown the potential to reduce the mass of vehicles, thereby decreasing fuel consumption during service. Furthermore, because a lower mass of steel is used in each vehicle, energy consumption associated with the steelmaking process is also reduced. Q&P steels utilize the deformation-induced martensitic transformation (DIMT) of metastable retained austenite to enhance ductility and strain hardening. Accordingly, improvement of mechanical performance is contingent on the ability to precisely control the chemical and mechanical stability of austenite. Considering the multitude of factors that influence austenite stability, optimizing microstructures to delay necking or fracture is challenging, particularly as temperature and strain rate increase. Tensile tests of an intercritically annealed C-Mn-Si Q&P steel were performed over a range of strain rates (10 À4 to 10 À1 s À1 ) to evaluate effects on the DIMT and sheet tensile properties. As strain rates increased from 10 À4 to 10 À1 s À1 , the uniform elongation decreased from approximately 19 to 14 pct. This reduction in uniform elongation is associated with a decrease in the strain hardening exponent near the onset of strain localization. Based on experimental data from this study and review of previous research, it is postulated that the strengthening contribution of DIMT is controlled by competing effects of: (i) a decreasing chemical driving force for DIMT caused by deformation-induced heat accumulation at higher strain rates and (ii) an increasing number of martensite nucleation sites. This suggests that tailoring austenite stability for specific deformation conditions could enable further optimization of formability and vehicle crash behavior.

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Strain hardening behavior and microstructural evolution during plastic deformation of dual phase, non-grain oriented electrical and AISI 304 steels

Cited by 34 publications

References 30 publications

Effect of Warm Rolling and Annealing on Microstructure, Texture, and Mechanical Properties of a 2205 Duplex Stainless Steel

Effect of Warm Rolling and Annealing on Microstructure, Texture, and Mechanical Properties of a 2205 Duplex Stainless Steel

The Correlation Between the Microstructural Parameters and Mechanical Properties of Reduced Activation Ferritic–Martensitic (RAFM) Steel: Influence of Roll Deformation and Medium Temperature Tempering

Strain Rate Dependent Ductility and Strain Hardening in Q&P Steels

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