Identification, size classification and evolution of Laves phase precipitates in high chromium, fully ferritic steels

Barrilao, Jennifer Lopez; Kuhn, Bernd; Wessel, E.

doi:10.1016/j.micron.2017.07.010

Cited by 25 publications

(34 citation statements)

References 18 publications

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“…Cold-rolled and recrystallization + precipitation annealed (RX+PA) 17Cr2/3 surpasses grade 92 [57] and approximately matches the performance of the novel 12 Cr steel Super VM12 [58]. While creep deformation of intermetallic particle strengthened HiperFer is controlled by growth of the strengthening Laves phase precipitates [16,47,59,60], creep damage and failure are mainly related to the accumulation of plastic deformation in PFZs (cf. Fig.…”

Section: Creep Rupture Strengthmentioning

confidence: 98%

Science and Technology of High Performance Ferritic (HiperFer) Stainless Steels

Kuhn¹,

Talik²,

Fischer³

et al. 2020

Preprint

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Future, flexible thermal energy conversion systems require new, demand-optimized highperformance materials. The High performance Ferritic (HiperFer) stainless steels, under development at the Institute of Microstructure and Properties of Materials (IEK-2) at Forschungszentrum Jülich GmbH in Germany, provide a balanced combination of fatigue, creep and corrosion resistance at reasonable price. This paper outlines the scientific background of alloy performance development, which resulted in an age-hardening ferritic, stainless steel grade. Furthermore, technological properties are addressed and the potential concerning application is estimated by benchmarking versus conventional state of the art materials.

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Section: Creep Rupture Strengthmentioning

confidence: 98%

Science and Technology of High Performance Ferritic (HiperFer) Stainless Steels

Kuhn¹,

Talik²,

Fischer³

et al. 2020

Preprint

Self Cite

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“…A misorientation angle of >3 • was applied for the definition of fatigue-induced sub-grain boundaries. The generated micrographs were post-processed, binarized and quantitatively analyzed applying the commercial software package AnalysisPro ® with regard to grain size evolution and the freely available package ImageJ [37] concerning precipitate size evolution, following the method outlined in [38].…”

Section: Microstructural Observationmentioning

confidence: 99%

Impact of Thermomechanical Fatigue on Microstructure Evolution of a Ferritic-Martensitic 9 Cr and a Ferritic, Stainless 22 Cr Steel

2020

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The highly flexible operation schemes of future thermal energy conversion systems (concentrating solar power, heat storage and backup plants, power-2-X technologies) necessitate increased damage tolerance and durability of the applied structural materials under cyclic loading. Resistance to fatigue, especially thermomechanical fatigue and the associated implications for material selection, lifetime and its assessment, are issues not considered adequately by the power engineering materials community yet. This paper investigates the principal microstructural evolution, damage and failure of two steels in thermomechanical fatigue loading: Ferritic-martensitic grade 91 steel, a state of the art 9 wt % Cr power engineering grade and the 22 wt % Cr, ferritic, stainless Crofer® 22 H (trade name of VDM Metals GmbH, Germany; under license of Forschungszentrum Juelich GmbH) steel. While the ferritic-martensitic grade 91 steel suffers pronounced microstructural instability, the ferritic Crofer® 22 H provides superior microstructural stability and offers increased fatigue lifetime and more forgiving failure characteristics, because of innovative stabilization by (thermomechanically triggered) precipitation of fine Laves phase particles. The potential for further development of this mechanism of strengthening against fatigue is addressed.

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“…Cold-rolled and recrystallization + precipitation annealed (RX + PA) 17Cr2 surpasses grade 92 [57] and approximately matches the performance of the novel 12 Cr steel Super VM12 [58]. While creep deformation of intermetallic particle strengthened HiperFer is controlled by growth of the strengthening Laves phase precipitates [16,47,59,60], creep damage and failure are mainly related to the accumulation of plastic deformation in PFZs (cf. Figure 11), evolving along high angle grain boundaries [36,47], in long-term application.…”

Section: Creep Rupture Strengthmentioning

confidence: 99%

“…Intragranular solid solution strengthening and particle volume fraction, as well as grain boundary particle coverage, were successfully increased and PFZ width alongside grain boundaries diminished in the 17Cr5 variant. controlled by growth of the strengthening Laves phase precipitates [16,47,59,60], creep damage and failure are mainly related to the accumulation of plastic deformation in PFZs (cf. Figure 11), evolving along high angle grain boundaries [36,47], in long-term application.…”

Section: Creep Rupture Strengthmentioning

confidence: 99%

Science and Technology of High Performance Ferritic (HiperFer) Stainless Steels

Kuhn

Talik

Fischer

et al. 2020

Metals

Self Cite

View full text Add to dashboard Cite

Future, flexible thermal energy conversion systems require new, demand-optimized high-performance materials. The High performance Ferritic (HiperFer) stainless steels, under development at the Institute of Microstructure and Properties of Materials (IEK-2) at Forschungszentrum Jülich GmbH in Germany, provide a balanced combination of fatigue, creep and corrosion resistance at reasonable price. This paper outlines the scientific background of alloy performance development, which resulted in an age-hardening ferritic, stainless steel grade. Furthermore, technological properties are addressed and the potential concerning application is estimated by benchmarking versus conventional state of the art materials.

show abstract

Identification, size classification and evolution of Laves phase precipitates in high chromium, fully ferritic steels

Cited by 25 publications

References 18 publications

Science and Technology of High Performance Ferritic (HiperFer) Stainless Steels

Science and Technology of High Performance Ferritic (HiperFer) Stainless Steels

Impact of Thermomechanical Fatigue on Microstructure Evolution of a Ferritic-Martensitic 9 Cr and a Ferritic, Stainless 22 Cr Steel

Science and Technology of High Performance Ferritic (HiperFer) Stainless Steels

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