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Inverse Thermal Analysis of Alloy 690 Laser and Hybrid Laser–GMA Welds Using Solidification-Boundary Constraints

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Abstract

An inverse thermal analysis of Alloy 690 laser and hybrid laser–GMA welds is presented that uses numerical–analytical basis functions and boundary constraints based on measured solidification cross sections. In particular, the inverse analysis procedure uses three-dimensional constraint conditions such that two-dimensional projections of calculated solidification boundaries are constrained to map within experimentally measured solidification cross sections. Temperature histories calculated by this analysis are input data for computational procedures that predict solid-state phase transformations and mechanical response. These temperature histories can be used for inverse thermal analysis of welds corresponding to other welding processes whose process conditions are within similar regimes.

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Acknowledgment

This work was supported by a Naval Research Laboratory (NRL) internal core program.

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  1. Center for Computational Materials, Code 6390, Materials Science and Technology Division, Naval Research Laboratory, Washington, DC, USA

    S. G. Lambrakos

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  1. S. G. Lambrakos
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Correspondence to S. G. Lambrakos.

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Lambrakos, S.G. Inverse Thermal Analysis of Alloy 690 Laser and Hybrid Laser–GMA Welds Using Solidification-Boundary Constraints. J. of Materi Eng and Perform 26, 3877–3891 (2017). https://doi.org/10.1007/s11665-017-2838-9

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  • DOI: https://doi.org/10.1007/s11665-017-2838-9

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