Microstructural Evolution and Constitutive Relationship of M350 Grade Maraging Steel During Hot Deformation

Chakravarthi, K. V. A.; Koundinya, N.T.B.N.; Murty, S. V. S. Narayana; Rao, B. Nageswara

doi:10.1007/s11665-017-2539-4

Cited by 30 publications

(13 citation statements)

References 23 publications

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“…Its physical and mechanical properties are shown in Table 2. After solid solution treatment, air cooling, and aging, the metallographic structure of ultra-high strength steel is characterized by a high density of dislocations and single-phase Fe-Ni lath martensite structure [3], as shown in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

“…According to the studies from Ref. [35][36][37], the relationship between the flow stress and the strain rate at low stress can be described by the exponential function of Equation 2, and at high stress by the power exponential function of Equation (3). Equations (2) and 3…”

Section: = Expmentioning

confidence: 99%

“…18~20% Ni) is a kind of low carbon Fe-Ni martensite steel with inter-metallic compound precipitated and hardened by aging treatment. It is used in a wide variety of applications in transportation industries owing to its unique comprehensive mechanical properties, i.e., ultra-high strength up to 2.2 GPa, good plasticity and toughness, high hardness, excellent fatigue resistance and low crack propagation rate [1][2][3][4]. While due to the high nickel content, it has very low thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Behaviors and Microstructure Evolution of Iron–Nickel Based Ultra-High Strength Steel by SHPB Testing

Wang

Xie

et al. 2019

Metals

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Iron–nickel based ultra-high strength steel (wt. 18~20% Ni) is characterized by its high strength and low thermal conductivity, and is normally used to make key components by forming and machining processes. The optimization of these processes is based on a deep understanding of the mechanical and dynamic behaviors under high strain, high strain rate, and high temperature. In this paper, the relationship of stress to strain, strain rate, and temperature is systematically investigated by the dynamic compression tests combined with quasi-static compression tests, and the hardening and softening is associated with the transformation in microstructures. According to the analysis, dynamic recrystallization around 600 °C is assumed to be one important influencing factor, hence hot deformation equations are established and the critical strain for dynamic recrystallization and the volume fraction of the dynamic recrystallized grains are defined.

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Section: Methodsmentioning

confidence: 99%

Section: = Expmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic Behaviors and Microstructure Evolution of Iron–Nickel Based Ultra-High Strength Steel by SHPB Testing

Wang

Xie

et al. 2019

Metals

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“…In short, after 60 years of its existence, there are still several knowledge gaps related to maraging steels. In the area of mechanical working 70,71 , the lack of results on hot working processing maps in the 900 to 1300 °C temperature range is notorious for ultra-high-strength maraging steels 400 and 450. There are few studies on oxidation, especially on the role of molybdenum.…”

Section: Future Perspectivesmentioning

confidence: 99%

A Short Review on Ultra-High-Strength Maraging Steels and Future Perspectives

et al. 2021

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Maraging steels are among the highest strength steels commercially available. Despite being relatively rare and expensive, they may present a yield strength around 3 GPa and are indispensable for various applications. In the present paper, several aspects will be reviewed related to maraging steels including a brief history of its development, microstructure and acting hardening mechanisms, loss of toughness with the tensile strength increase, resistance to oxidation, and corrosion, nitriding behavior, and future perspectives.

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“…In the past, researches on maraging steels were mainly focused on the strengthening mechanism, precipitation behavior and heat treatment [3,5,9,10]. Less work has been done on the hot deformation behavior and the microstructure evolution of this class of materials [11,12]. The processing map (PM) technology based on the dynamic materials model (DDM) is a powerful approach to analyze the deformation mechanisms and optimize the processing parameters of materials due to its convenience and accuracy [13].…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior of an Ultra-High-Strength Fe–Ni–Co-Based Maraging Steel

Zhang

Wang

Shahzad

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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Hot processing behavior of an ultra-high-strength Fe-Ni-Co-based maraging steel was studied in temperature range of 900-1200 °C and strain rate range of 0.001-10 s −1 . Deformation processing parameters and optimum hot working window were characterized via flow stress analysis, constitutive equation construction, hot processing map calculation and microstructure evolution, respectively. Critical strain value for dynamic recrystallization was determined through theoretical mathematical differential method: the inflection point of θ-σ and − ∂θ/∂σ − σ curves. It was found that the flow stress increased with the decrease in deformation temperature and increase in the strain rate. The power dissipation maps in the strain range of 0.1-0.6 were entirely similar with the tendency of contour lines which implied that strain had no strong effect on the dissipation maps. Nevertheless, the instability maps showed obvious strain sensitivity with increasing strain, which was ascribed to the flow localization and instability. The optimized hot processing window of the experimental steel was obtained as 1100-1200 °C/0.001-1 s −1 and 1000-1100 °C/0.001-0.1 s −1 , with the efficiency range of 20-40%. Owing to high Mo content in the experimental steel, high dynamic activation energy, Q = 439.311 kJ mol −1 , was achieved, indicating that dynamic recrystallization was difficult to occur in the hot deformation process, which was proved via microstructure analysis under different hot deformation conditions.

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Microstructural Evolution and Constitutive Relationship of M350 Grade Maraging Steel During Hot Deformation

Cited by 30 publications

References 23 publications

Dynamic Behaviors and Microstructure Evolution of Iron–Nickel Based Ultra-High Strength Steel by SHPB Testing

Dynamic Behaviors and Microstructure Evolution of Iron–Nickel Based Ultra-High Strength Steel by SHPB Testing

A Short Review on Ultra-High-Strength Maraging Steels and Future Perspectives

Hot Deformation Behavior of an Ultra-High-Strength Fe–Ni–Co-Based Maraging Steel

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