Microstructure and mechanical properties of a CuNiTi alloy with a large product of strength and elongation

Zhang, Ping; Li, Yunping; Lei, Qian; Tan, Hui; Shi, Runkun; She, Junlin; Li, Shengyao; Zhu, Jian Jun; Sheng, Xiaofei; Zhang, Jian

doi:10.1016/j.jmrt.2019.12.061

Cited by 19 publications

(3 citation statements)

References 36 publications

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“…The PSE value which reflects the balance between ductility and strength for AHSS steels in engineering applications [ 60 ] may also be an indication of the damage tolerance of the material. [ 61 ] First‐generation AHSS steels, such as TRIP and dual‐phase steels, have PSE values close to 20 GPa%, [ 60 ] medium‐manganese steels present PSE values between 30 and 50 GPa%, and may exhibit even higher values depending on the chemical composition and thermomechanical processes employed. [ 62 ] Therefore, a PSE value of around 30 GPa%, as found in this work for the IQP condition, suggests that the resulting microstructure has an excellent balance of mechanical properties, thus being a promising steel for automotive applications.…”

Section: Resultsmentioning

confidence: 99%

Application of Intercritical Austenitizing in a Commercial CMnSi Steel as a Tool for Optimizing a One‐Step Quenching and Partitioning Cycle Aiming to Achieve a Third‐Generation Advanced High‐Strength Steel

Magalhães,

Corrêa,

Faria

2024

steel research int.

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Advanced high‐strength steels (AHSS) have been extensively studied to develop its third generation from relatively low‐cost alloys, but seeking optimized mechanical properties. In this context, the effects of quenching heat treatments are evaluated in this work after intercritical austenitizing (IA) on microstructure, alloying elements partitioning, and Ms temperature for a commercial CMnSi alloy. Applying dilatometric data and microstructural characterization, different heat cycles are evaluated. The obtained experimental results are compared with those ones obtained by computer simulations at equilibrium conditions. Based on this characterization, an optimized one‐step quenching and partitioning (Q&P) cycle (after IA) is proposed and applied to tensile test specimens. Then, the specimen microstructure is characterized by scanning and transmission electron microscopy as well as by X‐ray diffraction. Using the proposed methodology, it is possible to produce a Q&P steel with a product of tensile strength and elongation of 29.5 GPa% and a 7% volumetric fraction of retained austenite. It is concluded that the precise knowledge about the IA effects on the phase transformations and microstructure evolution in a commercial CMnSi alloy has great potential to be applied in defining a one‐step Q&P heat treatment that favors a multiphase microstructure, which meets mechanical properties requirements for a third‐generation AHSS.

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Section: Resultsmentioning

confidence: 99%

Application of Intercritical Austenitizing in a Commercial CMnSi Steel as a Tool for Optimizing a One‐Step Quenching and Partitioning Cycle Aiming to Achieve a Third‐Generation Advanced High‐Strength Steel

Magalhães,

Corrêa,

Faria

2024

steel research int.

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“…This study aimed to produce an alloy steel using ferroalloys. In addition, medium-frequency induction was widely used for casting [19,20] and alloy preparation [21]. Notably, literature on the usage of a medium-frequency induction furnace in the recycling of alloy steel scrap is extremely limited.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics Analysis and Pilot Study of Reusing Medium and High Alloy Steel Scrap Using Induction Melting and Electroslag Remelting Process

Liu

Mei

et al. 2022

Metals

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The annual cumulative quantity of high and medium alloy steel scrap has exceeded 10 million tons. Using the traditional smelting process involving electric arc refining in a smelting furnace for these scraps causes high percentages of alloy losses, which decreases the value of the alloy steel scrap and poses environmental threats. Existing studies have rarely focused on separate smelting of the scrap and oxidation behaviors of the alloying elements. Therefore, this study proposes an induction melting and electroslag remelting scheme to process the scrap. Based on this scheme, the effects of the temperature, oxygen content, and element contents on the recovery percentages of the alloying elements were investigated using pilot experiment and thermodynamic analysis. The experimental results showed that the alloying elements (tungsten, chromium, nickel, molybdenum, and vanadium) exhibited recovery percentages of 97.36%, 94.62%, 97.63%, 95.09%, and 89.49%, respectively; furthermore, the impurity content did not increase during smelting. The thermodynamic analysis indicated that an increase in carbon content improved the oxidation resistance of the alloying elements except for nickel, whereas the increases in the contents of oxygen and alloying elements increase their oxidation. Steam partial pressure and air suction dramatically increase the concentrations of nitrogen, hydrogen and oxygen. This scheme is an alternative for smelting medium and high alloy steel scrap, and the thermodynamic analysis provides a theoretical understanding of the oxidation behaviors of the alloying elements in the steel scrap and the control of impurity.

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“…Microstructural and mechanical properties were similarly modified and improved on other types of materials, like nickel-based coatings [14] and titanium alloys [15,16]. Furthermore, several other types of applications different from the heat treatments were carried out by means of the induction heating, like melting and casting of copper [17] and nickel alloys [18], technological processes implying large deformations [19,20], and innovative welding processes [21,22]. By the present paper, authors proposed experimental methods to quantify the impact on the mechanical properties of a localized induction heat treatment performed on steel hose fittings for hydraulic applications.…”

Section: Introductionmentioning

confidence: 99%

Localized Heat Treatment to Improve the Formability of Steel Pipes for Hydraulic Applications: Process Design and Mechanical Characterization

Bruno

Canto²,

Luciani³

2021

Preprint

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In the present work, authors have demonstrated how a localized induction heat treatment can be advantageously applied, controlled and mechanically characterized on a specific part – i.e. on steel hose fittings for hydraulic applications. More specifically, the study shows how this specific type of heat treatment facilitates the acquisition of significant localization effects on mechanical properties, and how such a treatment could act as a powerful tool for material optimization in diverse applications. The instrumented micro-indentation test was adopted as the investigation method for mechanical characterization and, due to the reduced amount of material required for the test, has the double advantage of retrieving potential spatial gradients of the mechanical properties without causing permanent damage to the entirety of analyzed parts. The measurement of both the Vickers hardness and plastic work required to make the indentation that would be necessary to quantify the strength and ductility capability of the parts’ material. In addition, a customized tensile test, based on the strains measurement obtained through an optical full-field method – i.e. Digital Image Correlation (DIC) – was developed with the aim of identifying and quantifying the correlation between the material properties attainable through a conventional tensile test and those measured by the instrumented micro-indentation test. Finally, it was demonstrated that the proposed customized tensile test, due to the localized heat treatment, is capable of retrieving potential spatial gradients of material properties.

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Microstructure and mechanical properties of a CuNiTi alloy with a large product of strength and elongation

Cited by 19 publications

References 36 publications

Application of Intercritical Austenitizing in a Commercial CMnSi Steel as a Tool for Optimizing a One‐Step Quenching and Partitioning Cycle Aiming to Achieve a Third‐Generation Advanced High‐Strength Steel

Application of Intercritical Austenitizing in a Commercial CMnSi Steel as a Tool for Optimizing a One‐Step Quenching and Partitioning Cycle Aiming to Achieve a Third‐Generation Advanced High‐Strength Steel

Thermodynamics Analysis and Pilot Study of Reusing Medium and High Alloy Steel Scrap Using Induction Melting and Electroslag Remelting Process

Localized Heat Treatment to Improve the Formability of Steel Pipes for Hydraulic Applications: Process Design and Mechanical Characterization

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