Influence of a cryogenic treatment on the fracture toughness of an AISI 420 martensitic stainless steel

Prieto, Germán; Tuckart, Walter Roberto; Ipiña, Juan E. Perez

doi:10.17222/mit.2016.126

Cited by 14 publications

(21 citation statements)

References 31 publications

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“…The carbon contents are not observed in the matrix because they are very low percentage (0.34%). These findings have also been reported by [2]. Figure 7 (b, d) revealed chromium and iron content in the carbide particle and represent that there is chromium depletion for carbide particles, because of M23C6 or M7C3 carbides formation.…”

Section: ) Microscopic Examinationsupporting

confidence: 85%

“…Cryogenic treatments have been employed in the development of the most recent three decades in both high-alloy and tool sheets of steel to increase wear resistance [1]. They are progressively used for steels and another group of alloys for enhancing their tribological performance [2]. Cryogenic Treatments (DCT) that associated with temperatures in around (-196°C) are given by using liquid nitrogen or liquid helium (-296°C) as cooling agents [1].…”

Section: Introductionmentioning

confidence: 99%

“…It was found an enrichment of wear properties and hardness after cryogenic treatment [6]. Prieto et al studied the influence of cryogenic treatment on the fracture toughness of an AISI 420 M.S.S, for both tool and high-alloy steels to develop their wear resistance, mainly within the transformation of retained austenite and the precipitation of fine carbides [2]. Khazaei and mollaahmedi investigated AISI 420 MSS that was exposed to rapid tempering, the influence of the mechanical properties was examined, explained that the precipitation of fine carbides M7C3 type may perhaps be answerable for the secondary hardening effect.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Martensitic Stainless Steel (AISI420) Subjected to Conventional and Cryogenic Treatments

Mohamed¹,

Ataiwi²,

Dawood³

2020

ETJ

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Martensitic Stainless Steel (AISI420) MSS are vastly used because of their properties conventional which mix good mechanical and corrosion resistance. Cryogenic up to -196°C for different soaking time and heat treatments at (1000,500,200°C) for 15 minutes is one of the ways that used to enhance mechanical properties of these steels by means transformation of retained austenite, deformation regarding martensite then carbide refinement. the result showed an increase in tensile strength of samples that were treated cryogenically and tempered at 500°C was 933 (MPa) compared to samples that just treated conventionally in austenitizing and tempering at the same temperature that was 880 (MPa). The hardness values increased considerably to 414HV and 321 HV for the specimen that tempered at 200°C and 500°C respectively, precipitation of small carbides was observed that this is responsible for the improvement in the mechanical properties of the material.

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Section: ) Microscopic Examinationsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical Properties of Martensitic Stainless Steel (AISI420) Subjected to Conventional and Cryogenic Treatments

Mohamed¹,

Ataiwi²,

Dawood³

2020

ETJ

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“…10 Especially vacuum heat treatment, deep cryogenic treatment and pulse plasma nitriding have shown very positive effects on the performance of high-speed steels. [11][12][13][14][15] If the substrate is not hard enough to carry the load, elastic and plastic deformation will occur in the substrate under the contact, leading to the failure of the coating. Therefore, on a harder substrate, a higher contact loading can be applied without the coating failure due to fracture, spalling or delamination.…”

Section: Introductionmentioning

confidence: 99%

Influence of the substrate hardness and fracture toughness on the dynamic wear properties of coated tool steels

Sedlaček¹,

Batič²,

Česnik³

et al. 2019

Mater. Tehnol.

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The aim of this work was to determine the impact of various heat-treatment processes and parameters on the substrate hardness and fracture toughness combination and subsequently on the wear properties and subsurface deformation of coated tool steel under dynamic impact loading. Powder-metallurgy steels used as a substrate material were vacuum heat treated under six different conditions and combined with deep cryogenic treatment and nitriding with the aim to modify the hardness and fracture toughness. A TiAlN monolayer with 2-μm thickness was used for all the substrates. In order to evaluate the impact failure of the coating a ball-on-plate impact fatigue test was designed and used. It was shown that the use of a cryogenic treatment can increase the fracture toughness from 10 % up to 67 % while maintaining the same hardness for some cold-work tool steels, when on others it can have a negative effect. Regarding the static load-carrying capacity, the most important feature of the substrate is its hardness, which at working hardness of 63-64 HRc already provides good static load-carrying capacity of the coated substrate. The increased fracture toughness achieved by the deep cryogenic treatment can at very high and/or very low hardness of the substrate have a negative impact on the dynamic wear properties of the coated surfaces. On the other hand, in the case of vacuum heat treatment that ensures an adequate working hardness of 63-64 HRc, the deep cryogenic treatment improves the impact wear resistance of coated surfaces.

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“…A slight reduction in the macroscale friction coefficient has also been observed [11] and an increase in fracture toughness (ca. 30%) was reported in deep cryogenically treated specimens [12]. …”

Section: Introductionmentioning

confidence: 99%

Nanotribological behavior of deep cryogenically treated martensitic stainless steel

Prieto¹,

Bakoglidis²,

Tuckart³

et al. 2017

Beilstein J. Nanotechnol.

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Cryogenic treatments are increasingly used to improve the wear resistance of various steel alloys by means of transformation of retained austenite, deformation of virgin martensite and carbide refinement. In this work the nanotribological behavior and mechanical properties at the nano-scale of cryogenically and conventionally treated AISI 420 martensitic stainless steel were evaluated. Conventionally treated specimens were subjected to quenching and annealing, while the deep cryogenically treated samples were quenched, soaked in liquid nitrogen for 2 h and annealed. The elastic–plastic parameters of the materials were assessed by nanoindentation tests under displacement control, while the friction behavior and wear rate were evaluated by a nanoscratch testing methodology that it is used for the first time in steels. It was found that cryogenic treatments increased both hardness and elastic limit of a low-carbon martensitic stainless steel, while its tribological performance was enhanced marginally.

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Influence of a cryogenic treatment on the fracture toughness of an AISI 420 martensitic stainless steel

Cited by 14 publications

References 31 publications

Mechanical Properties of Martensitic Stainless Steel (AISI420) Subjected to Conventional and Cryogenic Treatments

Mechanical Properties of Martensitic Stainless Steel (AISI420) Subjected to Conventional and Cryogenic Treatments

Influence of the substrate hardness and fracture toughness on the dynamic wear properties of coated tool steels

Nanotribological behavior of deep cryogenically treated martensitic stainless steel

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