Effect of thermo-mechanical treatment on tensile properties of reduced activation ferritic-martensitic steel

Prakash, P.; Vanaja, J.; Srinivasan, N.; Rao, G. Appa; Laha, K.

doi:10.1016/j.msea.2018.03.080

Cited by 39 publications

(17 citation statements)

References 34 publications

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“…Along the through‐thickness direction of the plate, the yield strength, tensile strength, and hardness initially decreased and then increased. This was due to that under slow cooling conditions, the large thickness of the steel plate and the low cooling rate in its core, granular bainite was easy to form, which affected the strength and toughness of the position …”

Section: Resultsmentioning

confidence: 99%

Effect of Different Heat Exchange Zones on Microstructure and Properties of Ultra‐Heavy Steel Plate During Jet Quenching

Han

Wang

et al. 2019

steel research int.

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The temperature drop curves of an ultra-heavy plate with a thickness of 137 mm after quenching are measured at different positions using a jet quenching equipment and a multi-channel steel plate temperature recorder. The effect of the jet impact (Z1), intersection interference (Z2), and transverse flow (Z3) heat transfer zones on the temperature gradient of an ultra-heavy steel plate during jet quenching was investigated. The corresponding relationships and interaction mechanisms between cooling rate, microstructure, and mechanical properties during jet quenching are studied. The results indicate that Z2 and Z3 had a greater influence on temperature gradient and microstructure evolution, and Z1 and Z2 had a greater influence on the cooling rate and mechanical properties. The experimental results have guiding significance for the development of new quenching equipment for ultra-heavy steel plates and their industrial application.

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Section: Resultsmentioning

confidence: 99%

Effect of Different Heat Exchange Zones on Microstructure and Properties of Ultra‐Heavy Steel Plate During Jet Quenching

Han

Wang

et al. 2019

steel research int.

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“…Meanwhile, the precipitation of MX carbides instead of M 23 C 6 carbides is promoted. Finally, the steel is annealed at 650-800°C to obtain completely recrystallized grains and completely precipitate M 23 C 6 carbides [114]. In 2016, Hoffmann et al [111] treated the Eurofer 97 steel by using TMT at a thermal deformation temperature of 700°C and annealing temperature of 750°C.…”

Section: Machining Strengthened Rafm Steelmentioning

confidence: 99%

Strengthening mechanisms of reduced activation ferritic/martensitic steels: A review

Zhou

Shen

Jia

2021

Int J Miner Metall Mater

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This review summarizes the strengthening mechanisms of reduced activation ferritic/martensitic (RAFM) steels. High-angle grain boundaries, subgrain boundaries, nano-sized M 23 C 6 , and MX carbide precipitates effectively hinder dislocation motion and increase high-temperature strength. M 23 C 6 carbides are easily coarsened under high temperatures, thereby weakening their ability to block dislocations. Creep properties are improved through the reduction of M 23 C 6 carbides. Thus, the loss of strength must be compensated by other strengthening mechanisms. This review also outlines the recent progress in the development of RAFM steels. Oxide dispersion-strengthened steels prevent M 23 C 6 precipitation by reducing C content to increase creep life and introduce a high density of nano-sized oxide precipitates to offset the reduced strength. Severe plastic deformation methods can substantially refine subgrains and MX carbides in the steel. The thermal deformation strengthening of RAFM steels mainly relies on thermo-mechanical treatment to increase the MX carbide and subgrain boundaries. This procedure increases the creep life of TMT(thermo-mechanical treatment) 9Cr-1W-0.06Ta steel by ~20 times compared with those of F82H and Eurofer 97 steels under 550°C/260 MPa.

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“…23) Additionally, Prakash et al reported an improvement of hardness, tensile strength, ductility and work-hardening rate in RAFM steels (9Cr-1W-0.06Ta) by hot-rolling treatment at 973 K due to both matrix and precipitation refinement. 24) In addition, based on the fixed composition and rolling process, many researchers also attempted to optimize the heat treatment process to refine the microstructure. 25,26) It was demonstrated that the mixed microstructure of martensite and ferrite with coarse M 23 C 6 at ferrite grain boundaries in RAFM steels could decrease the Charpy impact properties in the normalized and tempered conditions.…”

Section: Design Of Reduced Activation Ferritic/martensitic Steels By mentioning

confidence: 99%

Design of Reduced Activation Ferritic/Martensitic Steels by Multiphase Optimization during the Entire Processing

et al. 2019

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Effect of thermo-mechanical treatment on tensile properties of reduced activation ferritic-martensitic steel

Cited by 39 publications

References 34 publications

Effect of Different Heat Exchange Zones on Microstructure and Properties of Ultra‐Heavy Steel Plate During Jet Quenching

Effect of Different Heat Exchange Zones on Microstructure and Properties of Ultra‐Heavy Steel Plate During Jet Quenching

Strengthening mechanisms of reduced activation ferritic/martensitic steels: A review

Design of Reduced Activation Ferritic/Martensitic Steels by Multiphase Optimization during the Entire Processing

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