A physically-based high temperature yield strength model for 9Cr steels

Barrett, Richard A.; O’Donoghue, P.E.; Leen, Seán B.

doi:10.1016/j.msea.2018.05.086

Cited by 43 publications

(21 citation statements)

References 59 publications

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“…17Cr1 HR in Fig. 3a), when directly compared to ferritic-martensitic steel [51]. Rolling at lower temperature (i.e.…”

Section: Tensile Strengthmentioning

confidence: 99%

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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“…17Cr1 HR in Fig. 3a), when directly compared to ferritic-martensitic steel [51]. Rolling at lower temperature (i.e.…”

Section: Tensile Strengthmentioning

confidence: 99%

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

Kuhn¹,

Talik²,

Fischer³

et al. 2020

Preprint

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“…The cast MarBN material shows comparable performance to the rolled P91, with superior cyclic strength (Figure 4(a)) at the initial (up to 28.5%) and half-life (up to 34.4%) cycles, and equivalent fatigue life (Figure 4(b)). This is attributed to (i) improved solid solution strengthening via W solute atoms and (ii) a more refined low-angle boundary microstructure, resulting from a finer distribution of M23C6 carbides as tungsten content increases [43]. The stress range of the forged material is similar to that of cast MarBN; however, the fatigue life is significantly increased, by a factor of approximately 2, indicating the key influence of manufacturing process on fatigue life.…”

Section: Discussionmentioning

confidence: 96%

Experimental and computational characterization of the effect of manufacturing-induced defects on high temperature, low-cycle fatigue for MarBN

O'Hara

Phelan

Osgerby³

et al. 2020

Materialia

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Manufacturing-induced defects are a key source of crack initiation and component failure under high temperature cyclic loading. In this work, 3D X-ray micro-computed tomography and microstructural analysis of manufacturing-induced defects is presented for forged and cast MarBN martensitic-ferritic steel, along with high temperature, low cycle fatigue testing, for assessment of the comparative effects of two manufacturing processes.Forging is found to significantly reduce the volume fraction and complexity of manufacturing defects, compared to the cast material, and as a result, approximately double fatigue life. A voxel-based finite element methodology for experimentallyidentified cast and forged manufacturing defects is presented, in conjunction with a multiaxial, critical-plane damage model, within a unified viscoplastic user-material subroutine. The effect of the complex morphologies of the manufacturing defects on high 2 temperature fatigue crack initiation is thus quantified, highlighting the relative effects of the two different manufacturing processes.

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“…As mentioned above, SSDs and GNDs are regarded as the two dominant factors in contribution to hardening performance of materials during deformation. Based on the Taylor hardening theory, 17,18 the representative yield strength (r R y ) coupled in a linear form by SSDs (r SSD y ) and GNDs (r GND y ) can be defined as 12…”

Section: Analytical Descriptionmentioning

confidence: 99%

A dislocation-based yield strength model for nano-indentation size effect

Tao

Gong

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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This paper presents a dislocation-based yield strength model for the nano-indentation size effect. The model is based on functional expressions involving the densities of statistically stored dislocations and geometrically necessary dislocations. A single-phase austenitic stainless steel (316L) and a ferrite-austenite dual-phase steel (2205) are used here as the case-study materials to validate the proposed model. Experimental testing and finite element modelling of nano-indentation of the two materials are presented. Experimental tests are performed in the indentation load range from 1000[Formula: see text] to 10000[Formula: see text]. For 2205 steel, finite element modelling is performed using a dual-phase microstructure-based model. It is shown that, with consideration of statistically stored dislocations and geometrically necessary dislocations, finite element modelling results can reproduce measured load–displacement curves and hence, the size effect, within an error range of about 5%.

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A physically-based high temperature yield strength model for 9Cr steels

Cited by 43 publications

References 59 publications

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

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

Experimental and computational characterization of the effect of manufacturing-induced defects on high temperature, low-cycle fatigue for MarBN

A dislocation-based yield strength model for nano-indentation size effect

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