Fracture toughness of a hot work tool steel-TiC composite produced by mechanical milling and spark plasma sintering

Henschel, Sebastian; Kietov, Volodymyr; Deirmina, Faraz; Pellizzari, M.; Krüger, Lutz

doi:10.1016/j.msea.2017.10.053

Cited by 19 publications

(9 citation statements)

References 22 publications

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“…Accordingly, the K IC obtained by this method was not rigorously valid because it did not fulfill the requirement of ASTM standard. Therefore, as suggested in previous articles of the authors, an apparent fracture toughness K app was reported . This value was generally higher than K IC measured according to ASTM E399, i.e., with a crack tip radius close to zero …”

Section: Methodssupporting

confidence: 49%

Fracture Toughness of a Hot Work Tool Steel Fabricated by Laser‐Powder Bed Fusion Additive Manufacturing

Pellizzari

Furlani

Deirmina

et al. 2019

steel research int.

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The fracture toughness of AISI H13 tool steel, additively manufactured by laser powder bed fusion (L-PBF) technique, is studied. The influence of the building direction on fracture toughness is investigated on small notched bending samples heat treated according to two different thermal cycles, namely, quenching and tempering (QT) and only tempering (T). The notch is electrodischarge machined parallel (P || ), perpendicular (P ⊥ ), and longitudinal (L) to the building direction. Both heat treatments, even if to a different extent, delete the as-built (AB) microstructure, producing secondary carbides precipitation in the martensitic matrix. The microstructure of the directly tempered parts is finer than the quenched and tempered ones. The fracture toughness increases moving from P ⊥ to P || . The T samples show a higher apparent fracture toughness in the P || , despite the higher hardness. Secondary cracks formation allows reducing the main crack opening driving force increasing the fracture toughness in P || samples. This effect is more pronounced in T samples where the stronger precipitation of carbides at the prior melt boundaries promotes secondary cracks. Moreover, in P || samples the laser tracks act as barriers to crack propagation and as stress dissipators.

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Section: Methodssupporting

confidence: 49%

Fracture Toughness of a Hot Work Tool Steel Fabricated by Laser‐Powder Bed Fusion Additive Manufacturing

Pellizzari

Furlani

Deirmina

et al. 2019

steel research int.

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“…For measuring the acoustic emissions, a piezoelectric transducer (type Pico, Physical Acoustics Corporation) was mounted on the surface of the specimen. This transducer shows high sensitivity for frequencies of 400 to 600 kHz, which corresponds to cleavage fracture [12]. The position is shown in Fig.…”

Section: Fig 2 Setup For Dynamic Tensile Tests (Left) and Charpy Impact Tests (Right)mentioning

confidence: 99%

“…Based on parameters of the signal such as amplitude, duration and frequency, conclusions on the cause of acoustic emissions can be drawn. This has been studied recently on steel and nodular cast iron [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of ceramic particles on the dynamic strength, deformation and toughness behavior of 42CrMo4

et al. 2021

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In this study, the effect of non-metallic inclusions on the material behavior of 42CrMo4 was investigated. By adding aluminum oxide particles to steel powder, different inclusion contents were simulated. The mechanical and fracture toughness properties were measured under dynamic loading. The damage was examined using the acoustic emissions. With an increasing inclusion content, a decreasing strength, deformability and fracture toughness were observed. The distribution of the inclusions along the surfaces of the prior steel particles lead to small distances between inclusions and favors the initiation of cracks at low stress. The early appearance of material damage was proven by acoustic emissions.

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“…The SiC addition promoted reaction layers between the steel that reduced mechanical strength compared with unreinforced ferritic steel after FAST. Deirmina and Pellizzari [50] and Henschel et al [51] both aimed to improve the fracture toughness of H13 tool steel through addition of reinforcing particles. Deirmina [50] added partially stabilised zirconia to take advantage of its transformation toughening effect.…”

Section: Multi Materials Systemsmentioning

confidence: 99%

Processing metal powders via field assisted sintering technology (FAST): A critical review

Weston

Thomas

Jackson

2019

Materials Science and Technology

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The current status of field assisted sintering technology (FAST) of structural metals from powder is critically reviewed. Recently, there have been significant increases in the uptake of FAST for metallic systems, composites and porous materials at the laboratory-scale. It is clear that FAST is tolerant of powder/particulate feedstock, allowing rapid production of materials, some of which would be challenging through conventional sintering techniques. Yet, the underlying mechanisms allowing this are not fully understood. Final specimen sizes tend to be small, which restricts rigorous mechanical assessment. This review demonstrates the clear benefits in transitioning laboratory-scale demonstrators to the industrial scale over the next few years. However, consideration will need to be given to size, throughput, and shape complexities to attract commercial investment.

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Fracture toughness of a hot work tool steel-TiC composite produced by mechanical milling and spark plasma sintering

Cited by 19 publications

References 22 publications

Fracture Toughness of a Hot Work Tool Steel Fabricated by Laser‐Powder Bed Fusion Additive Manufacturing

Fracture Toughness of a Hot Work Tool Steel Fabricated by Laser‐Powder Bed Fusion Additive Manufacturing

Effect of ceramic particles on the dynamic strength, deformation and toughness behavior of 42CrMo4

Processing metal powders via field assisted sintering technology (FAST): A critical review

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