Identification of fracture toughness parameters to understand the fracture resistance of advanced high strength sheet steels
Document identifier: oai:DiVA.org:ltu-77937
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10.1016/j.engfracmech.2020.106949Keyword: Engineering and Technology,
Mechanical Engineering,
Applied Mechanics,
Teknik och teknologier,
Maskinteknik,
Teknisk mekanik,
Fracture toughness,
J-integral,
Essential work of fracture,
Kahn tear tests,
Advanced high strength steel sheets,
Hållfasthetslära,
Solid MechanicsPublication year: 2020Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: The fracture toughness of four advanced high strength steel (AHSS) thin sheets is evaluated through different characterization methodologies, with the aim of identifying the most relevant toughness parameters to describe their fracture resistance. The investigated steels are: a Complex Phase steel, a Dual Phase steel, a Trip-Aided Bainitic Ferritic steel and a Quenching and Partitioning steel. Their crack initiation and propagation resistance is assessed by means of J-integral measurements, essential work of fracture tests and Kahn-type tear tests. The results obtained from the different methodologies are compared and discussed, and the influence of different parameters such as specimen geometry or notch radius is investigated. Crack initiation resistance parameters are shown to be independent of the specimen geometry and the testing method. However, significant differences are found in the crack propagation resistance values. The results show that, when there is a significant energetic contribution from necking during crack propagation, the specific essential work of fracture (we) better describes the overall fracture resistance of thin AHSS sheets than JC. In contrast, energy values obtained from tear tests overestimate the crack propagation resistance and provide a poor estimation of AHSS fracture performance. we is concluded to be the most suitable parameter to describe the global fracture behaviour of AHSS sheets and it is presented as a key property for new material design and optimization.
Authors
D. Frómeta
Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, Spain
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S. Parareda
Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, Spain
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A. Lara
Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, Spain
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S. Molas
Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, Spain
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D. Casellas
Luleå tekniska universitet; Material- och solidmekanik; Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, Spain
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P. Jonsén
Luleå tekniska universitet; Material- och solidmekanik
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J. Calvo
Universitat Politècnica de Catalunya, Spain
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header:
identifier: oai:DiVA.org:ltu-77937
datestamp: 2021-04-19T12:50:17Z
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recordCreationDate: 2020-03-03
identifier:
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77937
10.1016/j.engfracmech.2020.106949
2-s2.0-85080882787
titleInfo:
@attributes:
lang: eng
title: Identification of fracture toughness parameters to understand the fracture resistance of advanced high strength sheet steels
abstract: The fracture toughness of four advanced high strength steel (AHSS) thin sheets is evaluated through different characterization methodologies with the aim of identifying the most relevant toughness parameters to describe their fracture resistance. The investigated steels are: a Complex Phase steel a Dual Phase steel a Trip-Aided Bainitic Ferritic steel and a Quenching and Partitioning steel. Their crack initiation and propagation resistance is assessed by means of J-integral measurements essential work of fracture tests and Kahn-type tear tests. The results obtained from the different methodologies are compared and discussed and the influence of different parameters such as specimen geometry or notch radius is investigated. Crack initiation resistance parameters are shown to be independent of the specimen geometry and the testing method. However significant differences are found in the crack propagation resistance values. The results show that when there is a significant energetic contribution from necking during crack propagation the specific essential work of fracture (we) better describes the overall fracture resistance of thin AHSS sheets than JC. In contrast energy values obtained from tear tests overestimate the crack propagation resistance and provide a poor estimation of AHSS fracture performance. we is concluded to be the most suitable parameter to describe the global fracture behaviour of AHSS sheets and it is presented as a key property for new material design and optimization.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Engineering and Technology
Mechanical Engineering
Applied Mechanics
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Maskinteknik
Teknisk mekanik
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lang: eng
topic: Fracture toughness
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lang: eng
topic: J-integral
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lang: eng
topic: Essential work of fracture
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lang: eng
topic: Kahn tear tests
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lang: eng
topic: Advanced high strength steel sheets
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lang: swe
authority: ltu
topic: Hållfasthetslära
genre: Research subject
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lang: eng
authority: ltu
topic: Solid Mechanics
genre: Research subject
language:
languageTerm: eng
genre:
publication/journal-article
ref
note:
Published
7
Validerad;2020;Nivå 2;2020-03-20 (alebob)
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Frómeta
D.
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affiliation: Eurecat Centre Tecnològic de Catalunya Unit of Metallic and Ceramic Materials Spain
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Parareda
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Luleå tekniska universitet
Material- och solidmekanik
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affiliation: Universitat Politècnica de Catalunya Spain
originInfo:
dateIssued: 2020
publisher: Elsevier
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titleInfo:
title: Engineering Fracture Mechanics
identifier:
0013-7944
1873-7315
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type: volume
number: 229
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type: artNo
number: 106949
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