Strain hardening of cold-rolled lean-alloyed metastable ferritic-austenitic stainless steels

Papula, Suvi; Anttila, Severi; Talonen, Juho; Sarikka, Teemu; Virkkunen, Iikka; Hänninen, Hannu

doi:10.1016/j.msea.2016.09.038

Cited by 30 publications

(12 citation statements)

References 31 publications

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“…This change in slope is due to the predominance of transformation or twinning dominated deformation over dislocation plasticity in material which makes the θ value to be sustained over certain plastic strain 1 – 4 , 20 – 24 . Thus, the WH curve for M-pass specimen gets clearly divided in to two sub-stages of stage III namely dislocation (I) and transformation plasticity dominated (II) 1 – 4 , 20 – 24 . However, rate of work hardening during this sub-stage II (i.e.…”

Section: Rapid Work Hardening and Resultant Mechanical Propertiesmentioning

confidence: 99%

Extremely high strength and work hardening ability in a metastable high entropy alloy

Nene

Frank

Liu

et al. 2018

Sci Rep

117

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Design of multi-phase high entropy alloys uses metastability of phases to tune the strain accommodation by favoring transformation and/or twinning during deformation. Inspired by this, here we present Si containing dual phase Fe42Mn28Co10Cr15Si5 high entropy alloy (DP-5Si-HEA) exhibiting very high strength (1.15 GPa) and work hardening (WH) ability. The addition of Si in DP-5Si-HEA decreased the stability of f.c.c. (γ) matrix thereby promoting pronounced transformation induced plastic deformation in both as-cast and grain refined DP-5Si-HEAs. Higher yet sustained WH ability in fine grained DP-5Si-HEA is associated with the uniform strain partitioning among the metastable γ phase and resultant h.c.p. (ε) phase thereby resulting in total elongation of 12%. Hence, design of dual phase HEAs for improved strength and work hardenability can be attained by tuning the metastability of γ matrix through proper choice of alloy chemistry from the abundant compositional space of HEAs.

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Section: Rapid Work Hardening and Resultant Mechanical Propertiesmentioning

confidence: 99%

Extremely high strength and work hardening ability in a metastable high entropy alloy

Nene

Frank

Liu

et al. 2018

Sci Rep

117

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“…According to Fargas et al., the α and γ phases present in DSSs do not exhibit the same behavior during plastic deformation and posterior annealing, as a result of the heterogeneous strain partitioning that happens between them. Whereas the ferrite phase mainly deforms by dislocation glide due to its numerous slip systems, the austenite can deform by dislocation slip, twinning‐induced plasticity (TWIP), or transformation‐induced plasticity (TRIP), depending on its stability, which is basically established by the stacking fault energy (SFE) value of this phase . Moreover, the final annealing process consequently promotes an extensive recovery in ferrite, and the development of recrystallization in austenite, especially at phase interfaces, deformation twins, and shear bands …”

Section: Introductionmentioning

confidence: 99%

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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“…Therefore it is crucial to understand the mechanical response of LDSS 2101 under shock conditions. Many studies [6][7][8][9] have reported that DSS alloys have an anisotropic response due to its heterogeneous microstructure and the manufacturing process. Mateo et al [6] and Hutchinson et al [7] reported that DSS 2205 has anisotropic mechanical properties, and the Transverse Direction (TD) has a higher mechanical properties (yield stress, ultimate tensile strength and uniform elongation) when compared against those along the Rolling Direction (RD).…”

Section: Introductionmentioning

confidence: 99%

The effect of loading direction on the dynamic damage in lean duplex stainless steel 2101

Ameri¹,

Escobedo-Diaz²,

Quadir³

et al. 2018

AIP Conference Proceedings

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Abstract. The effect of loading direction on the spall strength and damage in Lean Duplex Stainless Steel 2101 (LDSS 2101) has been investigated. Experiments were conducted in a single stage gas-gun to test the spall strength of LDSS 2101 along the Rolling Direction (RD), Transverse Direction (TD) and Normal Direction (ND). Microstructural examinations were conducted using optical microscopy and Electron Backscatter Diffraction (EBSD). LDSS 2101 showed similar spall strength in all considered directions. However, the amount of spall damage was dependent on the loading direction. Moreover, most of the spall damage was accommodated within the ferrite phase.

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Strain hardening of cold-rolled lean-alloyed metastable ferritic-austenitic stainless steels

Cited by 30 publications

References 31 publications

Extremely high strength and work hardening ability in a metastable high entropy alloy

Extremely high strength and work hardening ability in a metastable high entropy alloy

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

The effect of loading direction on the dynamic damage in lean duplex stainless steel 2101

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