Effects of Al content on the high-temperature mechanical properties of Al-TRIP steel

Cui, Heng; Chen, Dayu; Kaitian, Zhang

doi:10.1080/02670836.2019.1710928

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…This reduces the stress concentration and the deformation resistance generated during the deformation process. So the steel can withstand greater deformation before fracture, which increases the plasticity of the steel [12]. On the other hand, as the stretching temperature increases, the cracks shift from the grain boundaries to the inner grain, as shown in Figure 8.…”

Section: Discussionmentioning

confidence: 99%

“…DU et al [11] find that the thermoplasticity of the material increases with the degree of recrystallization during high-temperature deformation by studying the tensile properties of NiFeCoCrMn high-entropy alloy after machining. CUI et al [12] in their study of the effect of Al content in Al-TRIP steels on their high-temperature mechanical properties find that recrystallization to form uniform grains can disperse deformation and reduce the strain difference between intercrystalline and grain boundaries, which further reduces stress concentration to enhance the plasticity of the steel. By investigating the thermoplastic properties of niobium microalloying with niobium containing 1800 MPa grade at different high-temperature conditions and analyzing the fracture failure mechanism of 0.04Nb steel in different temperature intervals, LIU et al [13] also shows that the precipitated phase of Nb inhibits dynamic recrystallization.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Nb and V microalloying on the thermoplasticity of new martensitic low-density steels

Sun,

Li,

Guo

et al. 2023

Matéria (Rio J.)

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By performing tensile tests in the temperature range of 800°C to 1200°C, the thermoplastic behavior of microalloyed and unmicroalloyed new martensitic low-density steels were investigated, and the mechanism of the effect of Nb and V microalloying on the thermoplasticity was revealed. The results showed that both microalloyed and unmicroalloyed steels have good thermoplasticity and the plasticity increased with increasing deformation temperature. The microalloyed steels above 1000°C could have their high-temperature plasticity significantly enhanced by Nb, V microalloying, while the microalloyed steels at or below 1000°C could have their plasticity reduced. When the deformation temperature exceeds 1000°C, complete recrystallization occurs in both microalloyed and unmicroalloyed steels. The Nb, V microalloys were able to refine the recrystallized grains, which could obtain a stronger resistance to crack expansion and give the microalloyed steels better high-temperature plasticity. When the deformation temperature at or below 1000°C, the unmicroalloyed steel exhibited significant recrystallization. The presence of numerous small-sized NbC precipitation phases, abundant in the microalloyed steel, hindered the recrystallization. This made dynamic recrystallization of microalloyed steels almost non-existent when deformation occurred at lower temperatures, which lead to lower plasticity compared to the unmicroalloyed steel.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Nb and V microalloying on the thermoplasticity of new martensitic low-density steels

Sun,

Li,

Guo

et al. 2023

Matéria (Rio J.)

View full text Add to dashboard Cite

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Chemical Composition Optimization and Isothermal Transformation of δ‐Transformation‐Induced Plasticity Steel for the Third‐Generation Advanced High‐Strength Steel Grade

Okur,

Davut,

Palumbo

et al. 2024

steel research int.

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A new low‐manganese transformation‐induced plasticity steel is designed with optimized nickel content to achieve superior strength and ductility while minimizing the use of expensive nickel. The steel is optimized using JMatPro software, then cast, and hot rolled. To assess the effect of intercritical annealing on austenite (martensite at room temperature) volume fraction and carbon content, hot‐rolled steel samples quenched from different annealing temperatures (680–1100 °C) are used. Additionally, hot‐rolled steel coupons are intercritically annealed at about 50% austenite formation temperature (740 °C) and then subjected to isothermal treatments at 300–425 °C for varying times (10–90 min). After optimizing these treatments to maximize retained austenite (RA), tensile specimens are heat‐treated first at 740 °C and then isothermally at 325 °C. Thermodynamic calculations suggest that aluminum combined with silicon may lead to the δ ferrite formation, and even minimal nickel content can stabilize a considerable amount of austenite. In the experimental studies, it is shown that lower‐temperature bainitic holding enhances austenite stability by enriching the carbon content. Optimized two‐stage heat treatments yield up to 25.8% RA, with a tensile strength of 867.2 MPa and elongation of 40.6%, achieving a strength‐elongation product of 35.2 GPa×%, surpassing the third‐generation advanced high‐strength steel grades minimum requirement of 30 GPa×%.

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Effects of Al content on the high-temperature mechanical properties of Al-TRIP steel

Cited by 2 publications

References 27 publications

Effects of Nb and V microalloying on the thermoplasticity of new martensitic low-density steels

Effects of Nb and V microalloying on the thermoplasticity of new martensitic low-density steels

Chemical Composition Optimization and Isothermal Transformation of δ‐Transformation‐Induced Plasticity Steel for the Third‐Generation Advanced High‐Strength Steel Grade

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