Interpretation of Charpy impact energy characteristics by microstructural evolution of dynamically compressed specimens in three tempered martensitic steels

Kim, Hyunmin; Park, Jaeyeong; Kang, Minju; Lee, Sunghak

doi:10.1016/j.msea.2015.09.099

Cited by 32 publications

(11 citation statements)

References 42 publications

(89 reference statements)

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“…~10J) during high strain impact/compressive loading conditions could enhance localised severe deformations along shear bands, resulted in subsurface white etching layers formation [54]. This is in agreement with the findings of other researchers who also reported that white etching layers can be extensively formed in low toughness temperedmartensite steels during dynamic compressive deformations [55]. They showed that a lower absorbed compressive deformation could be responsible for the formation of white etching (adiabatic shear) layers.…”

Section: Subsurface Microstructure Evolutionsupporting

confidence: 89%

Case study: Wear mechanisms of NiCrVMo-steel and CrB-steel scrap shear blades

Abbasi

Luo

Owens³

2018

Wear

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Shear blades are extensively used in the recycling of metal scrap. A comparative study was conducted on used medium carbon NiCrVMo and CrB containing steel scrap shear blades to better understand their wear mechanisms under service conditions. The microstructure and hardness of worn cutting edges and bulk material were characterised by optical microscopy, scanning electron microscopy and microanalysis, X-ray diffraction analysis and macro/micro hardness testing. Moreover, tensile and Charpy impact properties were obtained from the bulk material. Several wear mechanisms were identified in both blades which are categorised in two main groups, i.e. spalling and progressive wear. The progressive wear due to abrasive, adhesive and oxidation wear was observed in both blades. In NiCrVMo-steel blades, spalling and crack propagation from surface/subsurface white etching layers mainly caused the severe wear. However, spalling due to delamination wear and crack propagation from severely deformed subsurface layers was the dominant severe wear mechanism in CrB-steel blades.

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Section: Subsurface Microstructure Evolutionsupporting

confidence: 89%

Case study: Wear mechanisms of NiCrVMo-steel and CrB-steel scrap shear blades

Abbasi

Luo

Owens³

2018

Wear

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“…show that all the Charpy specimen fractures contain an initiation zone, a stable crack propagation zone, an unstable crack propagation zone, an arrest zone of unstable crack propagation and a shear lip, as illustrated in Fig. 9 [15]. The unstable crack propagation zones are fractured in quasi-cleavage mode, and the other zones are fractured primarily in dimple mode, as shown in Figs. 10-14.…”

Section: Fractographs Of Charpy Impact Specimensmentioning

confidence: 80%

Influence of carbides on the high-temperature tempered martensite embrittlement of martensitic heat-resistant steels

Zhang

Liu

2016

Materials Science and Engineering: A

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“…It can be supposed that the change in the fracture mechanism for 12Cr1MoV steel at the testing temperature of −40 °C is related to appreciable fluctuations of the rate of energy supply to the specimen at a certain stage of high‐rate deformation. As a result, the specimen remains in an excited state, while the excess of energy being supplied to the material dissipates in the zone adjacent to the concentrator …”

Section: Resultsmentioning

confidence: 99%

The role of notch tip shape and radius on deformation mechanisms of 12Cr1MoV steel under impact loading. Part 1. Energy parameters of fracture

Panin

Maruschak

Власов

et al. 2016

Fatigue Fract Eng Mat Struct

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Impact loading curves and fracture energy of the notched 12Cr1MoV ductile steel specimens are analysed. The qualitative description and quantitative parameters are obtained for major stages of ductile and brittle fracture depending on the shape of the notch and the stress stiffness ahead. It was shown that a zone with enhanced plasticity forms in the vicinity of V‐, U‐ and I‐shaped notches at 20 °C testing temperature, giving rise to ductile fracture. The stress stiffness at the notch tip increased with testing temperature reduced to −40 °C. We demonstrated that the size of shear lips on a fracture surface is a quantitative characteristic of fracture. Using this approach, which is close by nature to non‐linear fracture mechanics, together with the quantitative description of fracture surfaces, a physical–mechanical scheme of the specimen fracture was suggested for the case of enhanced and localized (constrained) plasticity near the stress concentrator tip.

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Interpretation of Charpy impact energy characteristics by microstructural evolution of dynamically compressed specimens in three tempered martensitic steels

Cited by 32 publications

References 42 publications

Case study: Wear mechanisms of NiCrVMo-steel and CrB-steel scrap shear blades

Case study: Wear mechanisms of NiCrVMo-steel and CrB-steel scrap shear blades

Influence of carbides on the high-temperature tempered martensite embrittlement of martensitic heat-resistant steels

The role of notch tip shape and radius on deformation mechanisms of 12Cr1MoV steel under impact loading. Part 1. Energy parameters of fracture

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