Tensile and Charpy impact properties of heat-treated high manganese steel at cryogenic temperatures

Park, Minha; Park, Geon-Woo; Kim, Sung-hwan; Choi, Yongwook; Kim, Hyoung Chan; Kwon, Se‐Hun; Noh, Seong Jin; Jeon, Jong Bae; Kim, Byung Jun

doi:10.1016/j.jnucmat.2022.153982

Cited by 13 publications

(3 citation statements)

References 42 publications

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“…The results show that as the austenitizing temperature increases, the impact energy absorption first rises and then falls, reaching a maximum of 67.2 J at 980 • C and decreasing by about 50% at 1200 • C. At different quenching temperatures, the proportion of E i (energy to initiate crack) is higher than E p (energy to propagate crack), indicating that the specimens have better crack initiation resistance, with E i dominating the energy absorption during the entire impact process. In many studies [23][24][25], it was noted that the ratio of crack propagation energy to initiation energy reflects the ductile-brittle fracture state of the material. At different austenitizing temperatures, the E p /E i ratio is <1, suggesting that the material tends to brittle fracture.…”

Section: Resultsmentioning

confidence: 99%

The Variation Patterns of the Martensitic Hierarchical Microstructure and Mechanical Properties of 35Si2MnCr2Ni3MoV Steel at Different Austenitizing Temperatures

Wu,

Yang,

Chen

et al. 2024

Materials

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This study investigates the influence of varying austenitizing temperatures on the microstructure and mechanical properties of 35Si2MnCr2Ni3MoV steel, utilizing Charpy impact testing and microscopic analysis techniques such as scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). The findings reveal that optimal combination of strength and toughness is achieved at an austenitizing temperature of 980 °C, resulting in an impact toughness of 67.2 J and a tensile strength of 2032 MPa. The prior austenite grain size initially decreases slightly with increasing temperature, then enlarges significantly beyond 1100 °C. The martensite blocks’ and packets’ structures exhibit a similar trend. The proportion of high–angle grain boundaries, determined by the density of the packets, peaks at 980 °C, providing maximal resistance to crack propagation. The amount of retained austenite increases noticeably after 980 °C; beyond 1200 °C, the coarsening of packets and a decrease in density reduce the likelihood of trapping retained austenite. Across different austenitizing temperatures, the steel demonstrates superior crack initiation resistance compared to crack propagation resistance, with the fracture mode transitioning from ductile dimple fracture to quasi–cleavage fracture as the austenitizing temperature increases.

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Section: Resultsmentioning

confidence: 99%

The Variation Patterns of the Martensitic Hierarchical Microstructure and Mechanical Properties of 35Si2MnCr2Ni3MoV Steel at Different Austenitizing Temperatures

Wu,

Yang,

Chen

et al. 2024

Materials

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“…HT steels are designed to improve hardness, toughness, and wear resistance through controlled heating and cooling, which is ideal for PIM purposes because they can maintain shape and structural integrity [64,65]. Suitable steels for this purpose, namely AISI H11 (DIN 1.2343), AISI H13 (DIN 1.2344), and AISI L6 (DIN 1.2714) [66], will be addressed in this paper.…”

Section: Ht Steelsmentioning

confidence: 99%

A Concise Review on Materials for Injection Moulds and Their Conventional and Non-Conventional Machining Processes

Pedroso,

Sebbe,

Silva

et al. 2024

Machines

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Injection moulds are crucial to produce plastic and lightweight metal components. One primary associated challenge is that these may suffer from different types of failures, such as wear and/or cracking, due to the extreme temperatures (T), thermal cycles, and pressures involved in the production process. According to the intended geometry and respective needs, mould manufacturing can be performed with conventional or non-conventional processes. This work focuses on three foremost alloys: AMPCO® (CuBe alloy), INVAR-36® (Fe-Ni alloys, Fe-Ni36), and heat-treated (HT) steels. An insight into the manufacturing processes’ limitations of these kinds of materials will be made, and solutions for more effective machining will be presented by reviewing other published works from the last decade. The main objective is to provide a concise and comprehensive review of the most recent investigations of these alloys’ manufacturing processes and present the machinability challenges from other authors, discovering the prospects for future work and contributing to the endeavours of the injection mould industry. This review highlighted the imperative for more extensive research and development in targeted domains.

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“…The four prevailing standards require high-manganese austenitic low-temperature steel plates to be delivered using the hot-rolling followed by the controlled-cooling process. Moreover, a number of researchers have delved into the effects of the various heat treatments [28,[72][73][74][75] and welding procedures [76][77][78] on the intrinsic characteristics of this steel variety. While various processing techniques have been employed by different scholars in their experiments, this treatise shall principally concentrate on unraveling the intricate interplay between the alloy composition and the performance attributes of high-manganese austenitic steel tailored for low-temperature environments.…”

Section: Standardsmentioning

confidence: 99%

Optimization of Mechanical Properties of High-Manganese Steel for LNG Storage Tanks: A Comprehensive Review of Alloying Element Effects

Li,

Zhang

et al. 2024

Metals

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High-manganese austenitic steel represents an innovative variety of low-temperature steel used in the construction of liquefied natural gas (LNG) storage tanks. This steel boasts remarkable characteristics such as exceptional plasticity, superior toughness at cryogenic temperatures, and robust fatigue resistance, all while providing significant cost benefits. By utilizing high-manganese steel, the material manufacturing costs can be considerably lowered, simultaneously ensuring the long-term stability and safety of LNG storage tanks. The alloying design is pivotal in attaining superior performance in high-manganese steel. Choosing the right chemical components to control the stacked fault energy (SFE) of high-manganese steel and fine-tuning its structure can further improve the balance between strength and plasticity. Summarizing the advancements in alloying design for high-manganese steel is of great importance, as it offers a foundational dataset for correlating the chemical composition with the performance. Therefore, this paper outlines the deformation mechanisms and the principles of low-temperature brittleness in high-manganese austenitic steel, and from this foundation, it explicates the precise functions of alloying elements within it. This aims to provide a reference for future alloying designs and the industrial deployment of high-manganese steel in LNG storage tanks.

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Tensile and Charpy impact properties of heat-treated high manganese steel at cryogenic temperatures

Cited by 13 publications

References 42 publications

The Variation Patterns of the Martensitic Hierarchical Microstructure and Mechanical Properties of 35Si2MnCr2Ni3MoV Steel at Different Austenitizing Temperatures

The Variation Patterns of the Martensitic Hierarchical Microstructure and Mechanical Properties of 35Si2MnCr2Ni3MoV Steel at Different Austenitizing Temperatures

A Concise Review on Materials for Injection Moulds and Their Conventional and Non-Conventional Machining Processes

Optimization of Mechanical Properties of High-Manganese Steel for LNG Storage Tanks: A Comprehensive Review of Alloying Element Effects

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