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Cracking and Failure Characteristics of Flame Cut Thick Steel Plates

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Cracking and Failure Characteristics of Flame Cut Thick Steel Plates. / Jokiaho, T.; Santa-aho, S.; Peura, P.; Vippola, M.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 51, 2020, p. 1744-1754.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Jokiaho, T, Santa-aho, S, Peura, P & Vippola, M 2020, 'Cracking and Failure Characteristics of Flame Cut Thick Steel Plates', Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, vol. 51, pp. 1744-1754. https://doi.org/10.1007/s11661-020-05639-x

APA

Jokiaho, T., Santa-aho, S., Peura, P., & Vippola, M. (2020). Cracking and Failure Characteristics of Flame Cut Thick Steel Plates. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 51, 1744-1754. https://doi.org/10.1007/s11661-020-05639-x

Vancouver

Jokiaho T, Santa-aho S, Peura P, Vippola M. Cracking and Failure Characteristics of Flame Cut Thick Steel Plates. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 2020;51:1744-1754. https://doi.org/10.1007/s11661-020-05639-x

Author

Jokiaho, T. ; Santa-aho, S. ; Peura, P. ; Vippola, M. / Cracking and Failure Characteristics of Flame Cut Thick Steel Plates. In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 2020 ; Vol. 51. pp. 1744-1754.

Bibtex - Download

@article{1638e074de674ae6ac0a7987e0d8c7b4,
title = "Cracking and Failure Characteristics of Flame Cut Thick Steel Plates",
abstract = "The manufacturing of thick wear-resistant steel plates commonly leads to a layered structure and non-uniform properties in the thickness direction which makes the processing and utilization of the plates problematic. The processing steps of thick plates include flame cutting, which generates a heat-affected zone and high residual stresses into the cut edge. In the worst case, the cutting causes cracking. However, the residual stress level alone is not high enough to break a wear-resistant steel plate that behaves normally. Therefore, high-tensile stress also requires a microstructurally weak factor for crack initiation. For this reason, the main objective of this study is to reveal the main microstructural reasons behind the cracking of plates in flame cutting. To achieve this, plate samples containing cracks are mechanically tested and analyzed by electron microscopy. The results show that cracks are commonly formed horizontally into the tempered region of the heat-affected zone. Cracks initiate in the segregations, which typically have a higher amount of impurity and alloying elements. Increased impurity and alloying content in the segregations decreases the cohesion of the prior austenite grain boundaries. These weakened grain boundaries combined with high-residual tensile stress generate the cracks in the flame-cutting process.",
author = "T. Jokiaho and S. Santa-aho and P. Peura and M. Vippola",
year = "2020",
doi = "10.1007/s11661-020-05639-x",
language = "English",
volume = "51",
pages = "1744--1754",
journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",
issn = "1073-5623",
publisher = "ASM International",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Cracking and Failure Characteristics of Flame Cut Thick Steel Plates

AU - Jokiaho, T.

AU - Santa-aho, S.

AU - Peura, P.

AU - Vippola, M.

PY - 2020

Y1 - 2020

N2 - The manufacturing of thick wear-resistant steel plates commonly leads to a layered structure and non-uniform properties in the thickness direction which makes the processing and utilization of the plates problematic. The processing steps of thick plates include flame cutting, which generates a heat-affected zone and high residual stresses into the cut edge. In the worst case, the cutting causes cracking. However, the residual stress level alone is not high enough to break a wear-resistant steel plate that behaves normally. Therefore, high-tensile stress also requires a microstructurally weak factor for crack initiation. For this reason, the main objective of this study is to reveal the main microstructural reasons behind the cracking of plates in flame cutting. To achieve this, plate samples containing cracks are mechanically tested and analyzed by electron microscopy. The results show that cracks are commonly formed horizontally into the tempered region of the heat-affected zone. Cracks initiate in the segregations, which typically have a higher amount of impurity and alloying elements. Increased impurity and alloying content in the segregations decreases the cohesion of the prior austenite grain boundaries. These weakened grain boundaries combined with high-residual tensile stress generate the cracks in the flame-cutting process.

AB - The manufacturing of thick wear-resistant steel plates commonly leads to a layered structure and non-uniform properties in the thickness direction which makes the processing and utilization of the plates problematic. The processing steps of thick plates include flame cutting, which generates a heat-affected zone and high residual stresses into the cut edge. In the worst case, the cutting causes cracking. However, the residual stress level alone is not high enough to break a wear-resistant steel plate that behaves normally. Therefore, high-tensile stress also requires a microstructurally weak factor for crack initiation. For this reason, the main objective of this study is to reveal the main microstructural reasons behind the cracking of plates in flame cutting. To achieve this, plate samples containing cracks are mechanically tested and analyzed by electron microscopy. The results show that cracks are commonly formed horizontally into the tempered region of the heat-affected zone. Cracks initiate in the segregations, which typically have a higher amount of impurity and alloying elements. Increased impurity and alloying content in the segregations decreases the cohesion of the prior austenite grain boundaries. These weakened grain boundaries combined with high-residual tensile stress generate the cracks in the flame-cutting process.

U2 - 10.1007/s11661-020-05639-x

DO - 10.1007/s11661-020-05639-x

M3 - Article

VL - 51

SP - 1744

EP - 1754

JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

SN - 1073-5623

ER -