A Comprehensive Comparison of the Analytical and Numerical Prediction of the Thermal History and Solidification Microstructure of Inconel 718 Products Made by Laser Powder-Bed Fusion.
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| Title: | A Comprehensive Comparison of the Analytical and Numerical Prediction of the Thermal History and Solidification Microstructure of Inconel 718 Products Made by Laser Powder-Bed Fusion. |
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| Authors: | Promoppatum, Patcharapit1, Shi-Chune Yao1 scyao@cmu.edu, Pistorius, P. Chris2, Rollett, Anthony D.2 |
| Source: | Engineering (00137782). Oct2017, Vol. 3 Issue 5, p685-694. 10p. |
| Subjects: | Finite element method, Microstructure, Three-dimensional printing |
| Abstract: | The finite-element (FE) model and the Rosenthal equation are used to study the thermal and microstructural phenomena in the laser powder-bed fusion of Inconel 718. A primary aim is to comprehend the advantages and disadvantages of the Rosenthal equation (which provides an analytical alternative to FE analysis), and to investigate the influence of underlying assumptions on estimated results. Various physical characteristics are compared among the FE model, Rosenthal equation, and experiments. The predicted melt pool shapes compared with reported experimental results from the literature show that both the FE model and the analytical (Rosenthal) equation provide a reasonably accurate estimation. At high heat input, under conditions leading to keyholing, the reported melt width is narrower than predicted by the analytical equation. Moreover, a sensitivity analysis based on choices of the absorptivity is performed, which shows that the Rosenthal approach is more sensitive to absorptivity, compared with the FE approach. The primary reason could be the effect of radiative and convective losses, which are assumed to be negligible in the Rosenthal equation. In addition, both methods predict a columnar solidification microstructure, which agrees well with experimental reports, and the primary dendrite arm spacing (PDAS) predicted with the two approaches is comparable with measurements. [ABSTRACT FROM AUTHOR] |
| Copyright of Engineering (00137782) is the property of Media Culture Ltd. 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: 139852985 AccessLevel: 6 PubType: Periodical PubTypeId: serialPeriodical PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A Comprehensive Comparison of the Analytical and Numerical Prediction of the Thermal History and Solidification Microstructure of Inconel 718 Products Made by Laser Powder-Bed Fusion. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Promoppatum%2C+Patcharapit%22">Promoppatum, Patcharapit</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Shi-Chune+Yao%22">Shi-Chune Yao</searchLink><relatesTo>1</relatesTo><i> scyao@cmu.edu</i><br /><searchLink fieldCode="AR" term="%22Pistorius%2C+P%2E+Chris%22">Pistorius, P. Chris</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Rollett%2C+Anthony+D%2E%22">Rollett, Anthony D.</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Engineering+%2800137782%29%22">Engineering (00137782)</searchLink>. Oct2017, Vol. 3 Issue 5, p685-694. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Three-dimensional+printing%22">Three-dimensional printing</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The finite-element (FE) model and the Rosenthal equation are used to study the thermal and microstructural phenomena in the laser powder-bed fusion of Inconel 718. A primary aim is to comprehend the advantages and disadvantages of the Rosenthal equation (which provides an analytical alternative to FE analysis), and to investigate the influence of underlying assumptions on estimated results. Various physical characteristics are compared among the FE model, Rosenthal equation, and experiments. The predicted melt pool shapes compared with reported experimental results from the literature show that both the FE model and the analytical (Rosenthal) equation provide a reasonably accurate estimation. At high heat input, under conditions leading to keyholing, the reported melt width is narrower than predicted by the analytical equation. Moreover, a sensitivity analysis based on choices of the absorptivity is performed, which shows that the Rosenthal approach is more sensitive to absorptivity, compared with the FE approach. The primary reason could be the effect of radiative and convective losses, which are assumed to be negligible in the Rosenthal equation. In addition, both methods predict a columnar solidification microstructure, which agrees well with experimental reports, and the primary dendrite arm spacing (PDAS) predicted with the two approaches is comparable with measurements. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Engineering (00137782) is the property of Media Culture Ltd. 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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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/J.ENG.2017.05.023 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 685 Subjects: – SubjectFull: Finite element method Type: general – SubjectFull: Microstructure Type: general – SubjectFull: Three-dimensional printing Type: general Titles: – TitleFull: A Comprehensive Comparison of the Analytical and Numerical Prediction of the Thermal History and Solidification Microstructure of Inconel 718 Products Made by Laser Powder-Bed Fusion. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Promoppatum, Patcharapit – PersonEntity: Name: NameFull: Shi-Chune Yao – PersonEntity: Name: NameFull: Pistorius, P. Chris – PersonEntity: Name: NameFull: Rollett, Anthony D. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 00137782 Numbering: – Type: volume Value: 3 – Type: issue Value: 5 Titles: – TitleFull: Engineering (00137782) Type: main |
| ResultId | 1 |
