Analysis of size and temperature effects in the ductile to brittle transition region of ferritic steels

Berejnoi, Carlos; Ipiña, Juan E. Perez

doi:10.1016/j.engfracmech.2015.09.041

Cited by 8 publications

(4 citation statements)

References 15 publications

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“…The values of K Jmean obtained using MC methodology at different temperatures and sizes are also shown, being clearly different from the MC. When only valid datasets of 1-inch size are considered [4], the values of K 0 and K med obtained using a 3P-W distribution are in concordance with those obtained using ASTM E1921-15a ε1 [1], although b k and K min were different. The fixed values stated in ASTM standard could not be appropriated when a size conversion criterion and/or some censoring procedure are included.…”

Section: Stable Crack Growth and Loss Of Constraint Limitationssupporting

confidence: 75%

“…The use of small datasets does not allow a correct K min and b K estimation. Berejnoi and Perez Ipiña [4] have shown that the threshold parameter K min and Weibull slope b K are clearly dependent on temperature and different from the values of 20 MPa.m 0.5 and 4, which are considered in the MC. This was found even for 1-inch size sets with all valid data.…”

Section: Stable Crack Growth and Loss Of Constraint Limitationsmentioning

confidence: 98%

“…Figure 1 shows the fracture behavior of different materials with temperature, including some that don't have a transition zone. The characterization of fracture resistance of ferritic steels in this region is problematic due to scatter in results, as well as size and temperature dependences [2][3][4][5][6][7][8][9].…”

mentioning

confidence: 99%

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Fracture Toughness of Ferritic Steels in the Ductile-to-Brittle Transition Region

Berejnoi¹,

Ipiña²

2016

Fracture Mechanics - Properties, Patterns and Behaviours

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Ferritic steels, as other materials, have different failure modes depending on the temperature. At elevated temperatures, they behave as ductile materials, while at low temperatures they are brittle. There is an intermediate temperature region where these alloys have a failure mode resulting from the competition between cleavage and ductile mechanisms. This region is known as the ductile-to-brittle transition zone. The characterization of fracture resistance of ferritic steels in the ductile-to-brittle transition region is problematic due to scatter in results, as well as size and temperature dependences. American Society for Testing and Materials (ASTM) has standardized the determination of a temperature reference (T 0 ) for the fracture toughness characterization of ferritic steels in this region. This chapter presents the evolution of the statistical treatment of fracture toughness data until the present, including some comments on T 0 determination, and some aspects that require a deeper analysis.

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Section: Stable Crack Growth and Loss Of Constraint Limitationssupporting

confidence: 75%

Section: Stable Crack Growth and Loss Of Constraint Limitationsmentioning

confidence: 98%

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Fracture Toughness of Ferritic Steels in the Ductile-to-Brittle Transition Region

Berejnoi¹,

Ipiña²

2016

Fracture Mechanics - Properties, Patterns and Behaviours

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“…On this account, knowledge about the structural performance of steel members subject to the spillage of cryogenic liquids is limited. A few studies in recent years have investigated the structural behaviour of steel at low temperatures (Berejnoi and Ipiña 2015;Majzoobi et al 2016;Bruchhausen et al 2017;Paik et al 2017;Nam et al 2018;Li et al 2019;Paik et al 2020). These studies confirmed the risk of ductile-to-brittle fracture transition in steel at cryogenic temperatures, which might lead to disastrous structural failures in LNG carriers and offshore structures.…”

Section: Introductionmentioning

confidence: 84%

Thermal analysis of marine structural steel EH36 subject to non-spreading cryogenic spills. Part I: experimental study

Nam

Mokhtari

Amdahl

2021

Ships and Offshore Structures

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Liquefied Natural Gas (LNG) spills may cause steel to embrittle, leading to the brittle fracture of marine structures due to the cryogenic temperatures. For the integrity assessment of marine steel structures in the event of an LNG spill, first and foremost, an accurate heat transfer analysis is required. This study presents an experimental set-up that allows for thermal-structural analysis of steel structures subject to non-spreading cryogenic spills. A local, non-spreading cryogenic spill was replicated by building a liquid nitrogen (LN 2 ) pool at the central zone of an EH36 steel plate under tensile loading. Six pool boiling tests were conducted on six different specimens. Temperature histories recorded by nine thermocouples are presented and discussed as well as the effect of surface roughness on cooling rates and boiling regimes. Numerical simulations of the experiments, discussed in Part II of this study, resulted in a heat flux curve for EH36 steel-LN 2 pool boiling.

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A discussion of “An engineering methodology for constraint corrections of elastic–plastic fracture toughness – Part II: Effects of specimen geometry and plastic strain on cleavage fracture predictions” by C. Ruggieri, R.G. Savioli, R.H. Dodds [Eng. Fract. Mech. 146 (2015) 185–209]

Lei¹

2017

Engineering Fracture Mechanics

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Analysis of size and temperature effects in the ductile to brittle transition region of ferritic steels

Cited by 8 publications

References 15 publications

Fracture Toughness of Ferritic Steels in the Ductile-to-Brittle Transition Region

Fracture Toughness of Ferritic Steels in the Ductile-to-Brittle Transition Region

Thermal analysis of marine structural steel EH36 subject to non-spreading cryogenic spills. Part I: experimental study

A discussion of “An engineering methodology for constraint corrections of elastic–plastic fracture toughness – Part II: Effects of specimen geometry and plastic strain on cleavage fracture predictions” by C. Ruggieri, R.G. Savioli, R.H. Dodds [Eng. Fract. Mech. 146 (2015) 185–209]

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