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

Zhou, Jinhua; Shen, Yongfeng; Jia, Nan

doi:10.1007/s12613-020-2121-1

Cited by 61 publications

(8 citation statements)

References 118 publications

(132 reference statements)

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“…Nevertheless, there have been preliminary studies on the hot deformation behavior of RAFM cladding tubes. [22][23][24] Fang et al [25] studied the effect of strain rates on the hot deformation and dynamic recrystallization (DRX) in China low-activation martensitic (CLAM) steel. The researchers found that DRX more easily occurs with high strain rates under large deformations.…”

Section: Introductionmentioning

confidence: 99%

Constitutive Equation for the Hot Deformation and Microstructure Evolution of 12Cr‐F/M Steel

Yue

Lin

et al. 2023

steel research int.

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Ferrite/martensite steel is an important material candidate for nuclear reactor claddings owing to its excellent mechanical properties and radiation resistance. In particular, the hot deformation behavior of 12Cr‐ferritic/martensitic (12Cr‐F/M) steel is crucial for the fabrication of cladding tubes, and experiments performed in a wide temperature range could reveal the possible thermal deformation behavior of 12Cr‐F/M steel during tube fabrication. Herein, hot compression experiments of 12Cr‐F/M steel are conducted with strain rates and deformation temperatures ranging from 0.005 to 5 s−1 and 750 to 1200 °C, respectively. According to the thermal deformation flow and thermal expansion curves of the alloy, the Arrhenius‐type constitutive equations before and after the phase transformation of 12Cr‐F/M steel are established, taking 950 °C as the critical point. The results show that for a strain rate of 0.5 s−1, the cooling intensity increases gradually with the deformation temperature. The ferrite transforms into a mixed structure of ferrite and pearlite and finally transforms into martensite. At 950 °C, the degree of austenitization of the alloy increases with the strain rate, and the texture changes from cubic to brass.

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Section: Introductionmentioning

confidence: 99%

Constitutive Equation for the Hot Deformation and Microstructure Evolution of 12Cr‐F/M Steel

Yue

Lin

et al. 2023

steel research int.

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“…Therefore, it is necessary to balance the impact toughness and wear resistance in order to improve the service life of the tools [25][26][27]. Generally speaking, there are many methods to improve the contradictory mechanical properties of steel, such as ultra-pure purification, heat treatment, large forging ratio and so on [21,[28][29][30][31]. However, on a technical level, the tool and die steel for cutting tools has reached a certain limit.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Wear Resistance on H13 Tool and Die Steels by Trace Nanoparticles

Kou

Dai

Wang

et al. 2022

Metals

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In order to improve the impact toughness and wear resistance of the tool and die steels, this study innovatively prepared strengthened H13 steels with different contents of single-phase TiC and dual-phase TiC + TiB2 through in situ nanoparticle/Al master alloys at room temperature. The microstructure evolution and mechanical properties as well as wear resistance were investigated. Results indicate that the H13 steel with 0.02 wt.% dual-phase TiC + TiB2 nanoparticles has a more uniform and finer microstructure, and the mechanical properties and wear resistance are significantly improved. The yield strength, maximum tensile strength, breaking strain, uniform elongation, product of strength plasticity, and unnotched and U-notched impact toughness of H13 steel with 0.02 wt.% dual-phase TiC + TiB2 are higher than that of H13 steel. In addition, the volume wear rate, maximum scratch depth and width reach 7.1 × 10−11 m3/m, 6050 nm and 90 μm, respectively, which are reduced by 44.5%, 30.1% and 45.5% compared with that of H13 steel. Refining the microstructure and improving impact toughness and wear resistance of H13 tool steel through trace nanoparticles can provide important inspiration for industrial applications.

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“…Creep performance is a critical criterion for evaluating durability at elevated temperatures and stresses, which directly determines the development cycle of high-performance heat-resistant alloys. [1][2][3][4][5][6] For commercial martensitic heat-resistant steels, such as grade 91, grade 92, grade 122, etc., the creep performance is one of the remarkable properties required to be provided and the associated creep mechanism is well documented. [4,[7][8][9][10][11] Creep lifetime is one of the essential criteria to evaluate the creep performance, which is obtained by two traditional approaches.…”

Section: Introductionmentioning

confidence: 99%

The Coupling Effect of Hierarchical Structures and MN‐Type Precipitates on the Creep Resistance for the High N Heat‐Resistant Martensitic Steel

Shi

Sun

Ning

et al. 2022

steel research int.

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Microstructure of the high nitrogen heat‐resistant martensitic steel (HNHM) crept using 140–170 MPa loading stresses at 923 K is investigated in correlation with creep lifetime and creep rupture strength. Upon creep deformation, both recrystallized grains and the preexisted hierarchical structures grow via strain‐induced boundaries migration (SIBM) induce the degradation of strengthening. For preexisted hierarchical structures in HNHM, martensitic packets and blocks are more inclined to form at higher stresses (170 MPa), causing the degradation of strength, while laths retain easily at lower stresses (140–155 MPa), retarding the creep damage. Additionally, under all stresses and upon 923 K, the highly stabilized MN precipitates not only pin the hierarchical structural boundaries effectively, but also act as the core for the nucleation of Laves, realizing strengthening. The findings elucidate the coupling contribution of hierarchical structures and MN‐type precipitates on the creep strengthening for HNHMs, challenging the common viewpoint that the coupling coarsening of lath and precipitates dominates the degradation of strengthening, and thus, deepens the understanding of the creep resistance of the HNHM and provides the first insights into obtaining reliable predicted creep life of the novel HNHMs.

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

Cited by 61 publications

References 118 publications

Constitutive Equation for the Hot Deformation and Microstructure Evolution of 12Cr‐F/M Steel

Constitutive Equation for the Hot Deformation and Microstructure Evolution of 12Cr‐F/M Steel

Enhancement of Wear Resistance on H13 Tool and Die Steels by Trace Nanoparticles

The Coupling Effect of Hierarchical Structures and MN‐Type Precipitates on the Creep Resistance for the High N Heat‐Resistant Martensitic Steel

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