Fracture properties of high performance steels and their welds

Wallin, Kim; Pallaspuro, Sakari; Valkonen, I; Karjalainen-Roikonen, Päivi; Suikkanen, Pasi

doi:10.1016/j.engfracmech.2015.01.007

Cited by 27 publications

(15 citation statements)

References 6 publications

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“…(13) [6]. Similarly to the Charpy-V correlation, it has also been found that the fracture toughness temperature dependence is slightly affected by the materials yield strength and the reference temperature T0 [6,7]. When the temperature dependence is expressed in the form of the parameter , the result has the form of Eq.…”

Section: Basis For Fracture Mechanical Brittle Fracture Analysis In Ementioning

confidence: 91%

“…It has been shown that the correlation between Charpy-V transition temperature and the Master Curve reference temperature is not a simple constant [6]. An improved correlation for bend specimens has the form of Eq.…”

Section: Basis For Fracture Mechanical Brittle Fracture Analysis In Ementioning

confidence: 99%

“…10 applies the median failure probability (Pf = 0.5) and correlates the Master Curve reference temperature T0 to the Charpy-V transition temperature by Eq. (10) Eq (6). and the values in…”

mentioning

confidence: 99%

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13.07: Extension of EN 1993‐1‐10 and EN 1993‐1‐12: To higher strengths and thinner sections

2017

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The Eurocode 3 sections EN 1993-1-10 and EN 1993-1-12 contain tables for the maximum permissible values of element thickness as a function of steel grade, quality and reference temperature. The tables cover steel strengths from S235 to S700 and section thicknesses above 10 mm. The tables have been constructed based on a fracture mechanical brittle fracture analysis using a Charpy-V impact energy criterion as reference.Ultra high strength steels above 700 MPa are not covered by the tables. Such steels are generally used in thinner sections than 10 mm, when the tables in EN 1993-1-10 and EN 1993-1-12 are limited to section thicknesses above 10 mm. Here, the same basic procedure as used for the tables in EN 1993-1-10 and EN 1993-1-12 is used to extend them to higher strength steels and thinner sections. The procedure is modified slightly to account for special characteristics of ultra high strength steels and thin sections. These modifications do not affect the present tables, but they provide a smooth transition to higher strength steels and thinner sections. The strong inherent conservatism in the EN 1993-1-10 procedure is not affected either.

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Section: Basis For Fracture Mechanical Brittle Fracture Analysis In Ementioning

confidence: 91%

Section: Basis For Fracture Mechanical Brittle Fracture Analysis In Ementioning

confidence: 99%

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13.07: Extension of EN 1993‐1‐10 and EN 1993‐1‐12: To higher strengths and thinner sections

2017

Self Cite

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“…There have been various methodologies developed to assess this scatter ranging from impact energy measurement to elastoplastic fracture toughness correlation with temperature. To analyse the fracture data in DBT region and to obtain a parameter, which can describe the DBT, and yet remain independent of different sources of scatter, the most promising and widely used method is the master curve approach, mostly developed by Wallin and standardized as ASTM E1921. The general form of fracture toughness distribution in DBT region, for 1 inch (1 T) thick specimens is expressed according to master curve methodology as

K_{italicJC, 1 T} = A + ((), A_{o} - A) exp ([], C ((), T - T_{o})) .

where K JC , 1T is the 1 T thickness corrected elastic plastic fracture toughness and A o and T o are the reference values of fracture toughness and corresponding temperature.…”

Section: Introductionmentioning

confidence: 99%

Weibull triaxiality: A novel constraint assessment parameter for cleavage fracture in ductile to brittle transition region

Tiwari

Singh

Ståhle

2018

Fatigue Fract Eng Mat Struct

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The cleavage fracture probability of ferritic and ferritic/martensitic steels is generally computed using Beremin's model. In this work, a novel approach is developed for Beremin's model to be applicable to crack tip conditions under nonself similar stress field. The modification of Beremin's model corrects the inaccurate integration of local cleavage fracture probabilities of reference volume elements due to the incorrect assumption of self similar stress field under large‐scale yielding. Under small‐scale yielding condition, where stresses remain self similar, integration of local cleavage failure probability is accurate. However, when the stresses differ along the thickness due to constraint loss, the integration of local cleavage fracture probability is inaccurate due to the fact that the stress levels are not same in all the reference volume elements. The modification developed in this work in the form of a parameter named Weibull Triaxiality, which measures the deviation of a crack tip volume from one under self similar stress field.

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“…However, when dealing with ferritic steels in notched conditions, the analysis of the temperature effect on the fracture resistance cannot be analysed through using the MC, given that it does not consider any notch effect. Consequently, the authors proposed the Notch Master Curve (NMC) [16], which assumes the independence between the temperature and the notch effects and combines the MC with the notch corrections provided by the TCD. The NMC was applied and validated in low and moderate strength ferritic-pearlitic steels (S275JR and S355J2, respectively) by using 25 mm thick (1T) CT notched specimens [1620].…”

Section: Introductionmentioning

confidence: 99%

Application and validation of the notch master curve in medium and high strength structural steels

2015

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This paper applies and validates the Notch Master Curve in two ferritic steels with medium (steel S460M) and high (steel S690Q) strength. The Notch Master Curve is an engineering tool that allows the fracture resistance of notched ferritic steels operating within their corresponding ductile-to-brittle transition zone to be estimated. It combines the Master Curve and the Theory of Critical Distances in order to take into account the temperature and the notch effect respectively, assuming that both effects are independent. The results, derived from 168 fracture tests on notched specimens, demonstrate the capability of the Notch Master Curve for the prediction of the fracture resistance of medium and high strength ferritic steels operating within their ductile-to-brittle transition zone and containing notches.

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Fracture properties of high performance steels and their welds

Cited by 27 publications

References 6 publications

13.07: Extension of EN 1993‐1‐10 and EN 1993‐1‐12: To higher strengths and thinner sections

13.07: Extension of EN 1993‐1‐10 and EN 1993‐1‐12: To higher strengths and thinner sections

Weibull triaxiality: A novel constraint assessment parameter for cleavage fracture in ductile to brittle transition region

Application and validation of the notch master curve in medium and high strength structural steels

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