Thermal stresses and their implication on cracking during laser melting of ceramic materials

J. F. Li; L. Li; F. H. Stott

doi:10.1016/j.actamat.2004.06.005

Thermal stresses and their implication on cracking during laser melting of ceramic materials

J. F. Li, L. Li, F. H. Stott

Mechanical and Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A three-dimensional mechanical finite element model has been developed to investigate thermal stresses and their implication on cracking during laser melting of ceramic materials. Special effort has been devoted to the effects of latent heat of fusion and fluid flow of the melt pool on the thermal stresses. Results have indicated that, although the trends in the predicted maximum tensile stresses with respect to laser processing conditions are the same, the contours in the tensile stresses on the surfaces of the treated tracks are significantly different for two simulation cases, using thermal loads provided by different thermal models that either consider or neglect latent heat of fusion and fluid flow of the melt pool. Such simulated results for thermal stresses can be reasonably correlated with the degree of occurrence of cracks and the morphologies of the cracks experimentally formed, under the corresponding laser processing conditions. © 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	4385-4398
Number of pages	13
Journal	Acta Materialia
Volume	52
Issue number	14
DOIs	https://doi.org/10.1016/j.actamat.2004.06.005
Publication status	Published - 16 Aug 2004

Keywords

Ceramics
Finite element analysis
Laser melting
Modelling

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10.1016/j.actamat.2004.06.005

LPRC: Laser Processing Research Centre Impact
Allegre, O. (PI), Crosby, D. (PI), Domingos, M. (PI), Francis, J. (PI), Gillen, D. (PI), Guo, W. (PI), Li, L. (PI), Mativenga, P. (PI), Rogers, B. D. (PI), Whitehead, D. (PI), Wilson, D. (PI), Zhong, S. (PI), Mirhosseini, N. (Researcher), Ouyang, J. (Researcher), Huang, Y. (Researcher), Wei, C. (Researcher), Cheng, D. (PGR student), Suryo Pratomo, E. (PGR student), Zhang, Z. (PGR student), Li, Z. (PGR student), Mo, H. (PGR student), Zhu, M. (PGR student), Li, Q. (PGR student), Liu, W. (PGR student), Wang, L. (PGR student), Guo, H. (PGR student), Heinemann, R. (PI) & Liu, Z. (PI)
1/04/00 → …
Project: Research

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title = "Thermal stresses and their implication on cracking during laser melting of ceramic materials",

abstract = "A three-dimensional mechanical finite element model has been developed to investigate thermal stresses and their implication on cracking during laser melting of ceramic materials. Special effort has been devoted to the effects of latent heat of fusion and fluid flow of the melt pool on the thermal stresses. Results have indicated that, although the trends in the predicted maximum tensile stresses with respect to laser processing conditions are the same, the contours in the tensile stresses on the surfaces of the treated tracks are significantly different for two simulation cases, using thermal loads provided by different thermal models that either consider or neglect latent heat of fusion and fluid flow of the melt pool. Such simulated results for thermal stresses can be reasonably correlated with the degree of occurrence of cracks and the morphologies of the cracks experimentally formed, under the corresponding laser processing conditions. {\textcopyright} 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.",

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author = "Li, {J. F.} and L. Li and Stott, {F. H.}",

year = "2004",

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doi = "10.1016/j.actamat.2004.06.005",

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T1 - Thermal stresses and their implication on cracking during laser melting of ceramic materials

AU - Li, J. F.

AU - Li, L.

AU - Stott, F. H.

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N2 - A three-dimensional mechanical finite element model has been developed to investigate thermal stresses and their implication on cracking during laser melting of ceramic materials. Special effort has been devoted to the effects of latent heat of fusion and fluid flow of the melt pool on the thermal stresses. Results have indicated that, although the trends in the predicted maximum tensile stresses with respect to laser processing conditions are the same, the contours in the tensile stresses on the surfaces of the treated tracks are significantly different for two simulation cases, using thermal loads provided by different thermal models that either consider or neglect latent heat of fusion and fluid flow of the melt pool. Such simulated results for thermal stresses can be reasonably correlated with the degree of occurrence of cracks and the morphologies of the cracks experimentally formed, under the corresponding laser processing conditions. © 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

AB - A three-dimensional mechanical finite element model has been developed to investigate thermal stresses and their implication on cracking during laser melting of ceramic materials. Special effort has been devoted to the effects of latent heat of fusion and fluid flow of the melt pool on the thermal stresses. Results have indicated that, although the trends in the predicted maximum tensile stresses with respect to laser processing conditions are the same, the contours in the tensile stresses on the surfaces of the treated tracks are significantly different for two simulation cases, using thermal loads provided by different thermal models that either consider or neglect latent heat of fusion and fluid flow of the melt pool. Such simulated results for thermal stresses can be reasonably correlated with the degree of occurrence of cracks and the morphologies of the cracks experimentally formed, under the corresponding laser processing conditions. © 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

KW - Ceramics

KW - Finite element analysis

KW - Laser melting

KW - Modelling

U2 - 10.1016/j.actamat.2004.06.005

DO - 10.1016/j.actamat.2004.06.005

M3 - Article

SN - 1873-2453

VL - 52

SP - 4385

EP - 4398

JO - Acta Materialia

JF - Acta Materialia

IS - 14

ER -

Thermal stresses and their implication on cracking during laser melting of ceramic materials

Abstract

Keywords

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LPRC: Laser Processing Research Centre Impact

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