Measurement of local brittle fracture stress for dynamic crack propagation in steel

Yanagimoto, Fuminori; Shibanuma, Kazuki; Kawabata, Tomoya; Suzuki, Katsuyuki; Aihara, Shuji

doi:10.1016/j.prostr.2016.06.051

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…Tear ridges are formed during the cleavage fracture process in the shear lip zone, which enable part of the energy to be released [21]. In the fiber zone, more secondary cracks are generated during the cleavage fracture process, which is the main energy release mechanism.…”

Section: Fractographymentioning

confidence: 99%

“…The fracture process of TiC during the stretching process can be divided into three steps (Figure 9b): (1) Under tensile stress, the TiC inclusion is divided into two sections; (2) a hole forms between the substrates; and (3) with the deformation of the matrix, the hole between the substrates becomes a long and narrow gap under the tensile stress. Tear ridges are formed during the cleavage fracture process in the shear lip zone, which enable part of the energy to be released [21]. In the fiber zone, more secondary cracks are generated during the cleavage fracture process, which is the main energy release mechanism.…”

Section: Fracture Behavior Of Micron-scale Tin and Tic Inclusionsmentioning

confidence: 99%

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Study of the Fracture Behavior of TiN and TiC Inclusions in NM550 Wear-Resistant Steel during the Tensile Process

Liu

Zhong-yang

Liu

et al. 2022

Metals

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NM550 wear-resistant steel is widely used in large-scale engineering and mining machinery under extremely harsh working conditions. In NM550 steel, the addition of Ti can cause the formation of micron-scale TiN and TiC inclusions, easily triggering cleavage fractures. The fracture behavior and precipitation rule of micron-scale TiN and TiC inclusions on the tensile process in NM550 steel was investigated by scanning electron microscopy, transmission electron microscopy, and energy spectrum analysis combined with thermodynamic theory. The TiN precipitated in the solid–liquid two-phase region at a precipitation temperature of 1710 K, whereas that of TiC was 1158 K along the austenite grain boundary. The sizes of the TiN precipitated in the liquid phase and the TiC precipitated in austenite were both at the micron scale, which is prone to cleavage fracture during the stretching process. Under tensile stress, microcracks were first initiated at the TiN inclusion, which were further separated forming a hole, whereas the TiC inclusion was divided into two sections with a long and narrow gap formed between the substrates. The sizes of the TiN and TiC were related to the cooling rate, Ti, and N contents. The larger the cooling rate and the lesser the Ti and N content, the smaller the TiN and TiC sizes.

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Section: Fractographymentioning

confidence: 99%

Section: Fracture Behavior Of Micron-scale Tin and Tic Inclusionsmentioning

confidence: 99%

Study of the Fracture Behavior of TiN and TiC Inclusions in NM550 Wear-Resistant Steel during the Tensile Process

Liu

Zhong-yang

Liu

et al. 2022

Metals

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Hydrogen-induced fast fracture in notched 1500 and 1700 MPa class automotive martensitic advanced high-strength steel

Venezuela

Hill

Zhou³

et al. 2021

Corrosion Science

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Increasing the Strength and Impact Toughness of Carbon Steel Using a Nanosized Eutectoid Resulting from Time-Controlled Quenching

Brykov,

Mierzwiński,

Efremenko

et al. 2024

Materials

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High-carbon steels are normally used as tool materials. The use of such steels for construction is limited due to their increased brittleness and poor weldability. However, it appears that high-carbon steels possess certain hidden reserves for enhanced plasticity and strength if properly heat-treated. An unconventional heat treatment was applied to carbon eutectoid steel (0.8 wt.% C) in order to increase its strength and impact toughness simultaneously. Samples for tensile and impact testing were held at 800 °C for different time ranges from 3 min to 9 min with subsequent cooling in oil. It was established that for each type of sample, an optimal holding time exists that is responsible for increased strength and high impact toughness. The hardness and microhardness levels of the surface and under-surface regions of the samples reached 390 HV after optimal heat treatment. An X-ray revealed a shift of the (211)α-peak to the lower 2-theta angles after heat treatment with the optimal holding time; this indicates an increase in carbon content in alpha solid solutions of approximately 0.12 wt.%. Thus, a nanostructured mixture of low-carbon martensite and thin cementite plates is formed in the under-surface region of carbon eutectoid steel after heat treatment, with a controlled holding time at the austenitizing temperature.

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Measurement of local brittle fracture stress for dynamic crack propagation in steel

Cited by 3 publications

References 14 publications

Study of the Fracture Behavior of TiN and TiC Inclusions in NM550 Wear-Resistant Steel during the Tensile Process

Study of the Fracture Behavior of TiN and TiC Inclusions in NM550 Wear-Resistant Steel during the Tensile Process

Hydrogen-induced fast fracture in notched 1500 and 1700 MPa class automotive martensitic advanced high-strength steel

Increasing the Strength and Impact Toughness of Carbon Steel Using a Nanosized Eutectoid Resulting from Time-Controlled Quenching

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