Precipitation Behavior and Microstructural Evolution of Vanadium-Added TRIP-Assisted Annealed Martensitic Steel

Li, Lili; Yu, Hao; Song, Chenghao; Lü, Jun; Hu, Junli; Zhou, Tao

doi:10.1002/srin.201600234

Cited by 13 publications

(3 citation statements)

References 42 publications

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“…Precipitation strengthening is influenced by many factors, [21,220,221] including: size, structure, composition and chemical ordering of precipitates; interface coherency and orientation relationship of precipitate and matrix; number density, inter-particle spacing and particle size distribution. Based on whether a dislocation can pass through the precipitate or has to loop around a precipitate, the strengthening mechanism is usually divided into two types: shearing and Orowan looping.…”

Section: Understanding Of Precipitation Strengthening By In Situ Analysis Of Precipitate-dislocation Interactionsmentioning

confidence: 99%

On the role of transmission electron microscopy for precipitation analysis in metallic materials

Zhou

Babu

Hou

et al. 2021

Critical Reviews in Solid State and Materials Sciences

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Precipitation hardening is one of the most important strengthening mechanisms in metallic materials, and thus, controlling precipitation is often critical in optimizing mechanical performance. Also other performance requirements such as functional and degradation properties are critically depending on precipitation. Control of precipitation in metallic materials is, thus, vital, and the approach presently in the limelight for this purpose is an integrated approach of theory, computations and experimental characterization. An empirical understanding is essential to build physical models upon and, furthermore, quantitative experimental data is needed to build databases and to calibrate the models. The most versatile tool for precipitation characterization is the transmission electron microscope (TEM). The TEM has sufficient resolving power to image even the finest precipitates, and with TEMbased microanalysis, overall quantitative data such as particle size distribution, volume fraction and number density of particles can be gathered. Moreover, details of precipitate structure, morphology and chemistry, can be revealed. TEM-based postmortem and in situ analysis of precipitation has made significant progress over the last decade, largely stimulated by the widespread application of aberration corrected microscopes and accompanying novel analytics. The purpose of this report is to review these recent developments in precipitation analysis methodology, including sample preparation. Application examples are provided for precipitation analysis in metals, and future prospects are discussed.

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Section: Understanding Of Precipitation Strengthening By In Situ Analysis Of Precipitate-dislocation Interactionsmentioning

confidence: 99%

On the role of transmission electron microscopy for precipitation analysis in metallic materials

Zhou

Babu

Hou

et al. 2021

Critical Reviews in Solid State and Materials Sciences

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“…During manufacturing, the final heat treatment is quench-hardening to form the supersaturated martensite, followed by an ageing treatment at about 450-525°C to stimulate precipitation from the supersaturated matrix [6][7][8]. These alloys can make use of multiple alloying elements for the precipitation [9][10][11][12][13][14][15], Cu being one of the most common elements. Cu has high solubility in the austenite and low solubility in the martensite, and its high supersaturation in the martensite enables the formation of a significant amount of very fine precipitates early during ageing [16,17].…”

Section: Introductionmentioning

confidence: 99%

Langer–Schwartz–Kampmann–Wagner precipitation simulations: assessment of models and materials design application for Cu precipitation in PH stainless steels

et al. 2020

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Quantitative modelling of precipitation kinetics can play an important role in a computational material design framework where, for example, optimization of alloying can become more efficient if it is computationally driven. Precipitation hardening (PH) stainless steels is one example where precipitation strengthening is vital to achieve optimum properties. The Langer–Schwartz–Kampmann–Wagner (LSKW) approach for modelling of precipitation has shown good results for different alloy systems, but the specific models and assumptions applied are critical. In the present work, we thus apply two state-of-the-art LSKW tools to evaluate the different treatments of nucleation and growth. The precipitation modelling is assessed with respect to experimental results for Cu precipitation in PH stainless steels. The LSKW modelling is able to predict the precipitation during ageing in good quantitative agreement with experimental results if the nucleation model allows for nucleation of precipitates with a composition far from the equilibrium and if a composition-dependent interfacial energy is considered. The modelling can also accurately predict trends with respect to alloy composition and ageing temperature found in the experimental data. For materials design purposes, it is though proposed that the modelling is calibrated by measurements of precipitate composition and fraction in key experiments prior to application. Graphic abstract

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“…The VC nano-precipitates were found to produce an effective precipitation hardening effect. Li et al [12] studied the precipitation behavior and microstructural evolution of vanadium-added martensitic steel, and also found that the precipitation strengthening contribution of the nano-sized VC particles was 167 MPa by the Ashby-Orowan mechanism.…”

Section: Introductionmentioning

confidence: 99%

Influence of Vanadium Microalloying on Microstructure and Property of Laser-Cladded Martensitic Stainless Steel Coating

Zhu

et al. 2020

Materials

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Martensitic stainless steel (MSS) coatings with different vanadium (V) contents (0–1.0 wt%) by microalloying have been successfully fabricated utilizing a unique laser cladding technique. The microstructure and properties of the resulting MSS coatings, with and without element V addition, have been carefully investigated by various advanced techniques, including XRD, SEM, TEM, microhardness tester, universal material testing machine, and electrochemical workstation. It was found that the V-free coating was mainly composed of martensite (M) and ferrite (F), trace M23C6 and M2N, while the V-bearing coatings consisted of M, F, M23C6, and VN nano-precipitates, and their number density increased with the increase of V content. The V microalloying can produce a significant impact on the mechanical properties of the resulting MSS laser-cladded specimens. As the V content increased, the elongation of the specimen increased, while the tensile strength and microhardness increased firstly and then decreased. Specifically, the striking comprehensive performance can be optimized by microalloying 0.5 wt% V in the MSS coating, with microhardness, tensile strength, yield strength, and elongation of 500.1 HV, 1756 MPa, 1375 MPa, and 11.9%, respectively. However, the corrosion resistance of the specimens decreased successively with increasing V content. The microstructure mechanisms accounting for the property changes have been discussed in detail.

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Precipitation Behavior and Microstructural Evolution of Vanadium-Added TRIP-Assisted Annealed Martensitic Steel

Cited by 13 publications

References 42 publications

On the role of transmission electron microscopy for precipitation analysis in metallic materials

On the role of transmission electron microscopy for precipitation analysis in metallic materials

Langer–Schwartz–Kampmann–Wagner precipitation simulations: assessment of models and materials design application for Cu precipitation in PH stainless steels

Influence of Vanadium Microalloying on Microstructure and Property of Laser-Cladded Martensitic Stainless Steel Coating

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