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Thermal fatigue behavior of an iron-based laser sintered material

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Title: Thermal fatigue behavior of an iron-based laser sintered material
Authors: Wang, Y. wychongchong@hotmail.com, Bergström, J.1 jens.bergstrom@kau.se, Burman, C.1 christer.burman@kau.se
Source: Materials Science & Engineering: A. Jul2009, Vol. 513-514, p64-71. 8p.
Subjects: Thermal fatigue of metals, Sintering, Industrial lasers, Thermal stresses, Metal fractures, Heat conduction
Abstract: Abstract: Direct metal laser sintering is a rapid manufacturing technique to make intricate and near net-shaped parts. An iron-based laser sintered metal was studied to evaluate its thermal fatigue properties. The test was performed using cylindrical specimens in a high power induction heating system equipped with a laser strain gauge for a contactless surface strain measurement. Initiation of thermal fatigue cracks occurred preferentially at pores and layer interfaces, while propagation of cracks followed along phase boundaries and thin inter-dendritic phases and showed an inter-granular fracture. By using the fundamental Fourier equation for heat conduction, the temperature cycle was modeled and calculated. A thermo elastic ideal plastic model was used to deduce the thermal stress based on surface strain experimentally measured. Finally, the temperature distribution, thermal stresses and mechanical strains were discussed with respect to thermal fatigue damage. [Copyright &y& Elsevier]
Copyright of Materials Science & Engineering: A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 38910853
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Thermal fatigue behavior of an iron-based laser sintered material
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  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Y%2E%22">Wang, Y.</searchLink><i> wychongchong@hotmail.com</i><br /><searchLink fieldCode="AR" term="%22Bergström%2C+J%2E%22">Bergström, J.</searchLink><relatesTo>1</relatesTo><i> jens.bergstrom@kau.se</i><br /><searchLink fieldCode="AR" term="%22Burman%2C+C%2E%22">Burman, C.</searchLink><relatesTo>1</relatesTo><i> christer.burman@kau.se</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+Science+%26+Engineering%3A+A%22">Materials Science & Engineering: A</searchLink>. Jul2009, Vol. 513-514, p64-71. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Thermal+fatigue+of+metals%22">Thermal fatigue of metals</searchLink><br /><searchLink fieldCode="DE" term="%22Sintering%22">Sintering</searchLink><br /><searchLink fieldCode="DE" term="%22Industrial+lasers%22">Industrial lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stresses%22">Thermal stresses</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+fractures%22">Metal fractures</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+conduction%22">Heat conduction</searchLink>
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  Data: Abstract: Direct metal laser sintering is a rapid manufacturing technique to make intricate and near net-shaped parts. An iron-based laser sintered metal was studied to evaluate its thermal fatigue properties. The test was performed using cylindrical specimens in a high power induction heating system equipped with a laser strain gauge for a contactless surface strain measurement. Initiation of thermal fatigue cracks occurred preferentially at pores and layer interfaces, while propagation of cracks followed along phase boundaries and thin inter-dendritic phases and showed an inter-granular fracture. By using the fundamental Fourier equation for heat conduction, the temperature cycle was modeled and calculated. A thermo elastic ideal plastic model was used to deduce the thermal stress based on surface strain experimentally measured. Finally, the temperature distribution, thermal stresses and mechanical strains were discussed with respect to thermal fatigue damage. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Science & Engineering: A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.msea.2009.01.053
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 64
    Subjects:
      – SubjectFull: Thermal fatigue of metals
        Type: general
      – SubjectFull: Sintering
        Type: general
      – SubjectFull: Industrial lasers
        Type: general
      – SubjectFull: Thermal stresses
        Type: general
      – SubjectFull: Metal fractures
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      – SubjectFull: Heat conduction
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              Text: Jul2009
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              Y: 2009
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