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In this paper, an algorithm based on pair correlation functions (PCFs) [3-4] has been utilized to characterize and reconstruct three-dimensional microstructures in AA5754 automotive aluminum alloy and its Plasma Arc and Nd:YAG laser tailor welded blank joints. PCFs are quantified and discussed in detail for three orthogonal sections of microstructures in base metal, heat-affected zone (HAZ) and weldment. Three-dimensional virtual microstructures in the form of ellipsoids are then reconstructed for each region of the welded joint that target to mimic the experimental PCFs on the corresponding section. The generated virtual microstructure could be directly used for numerical analysis (e.g. finite element method) in delineating a quantitative microstructure-mechanical properties relationship.
References
1. Viewpoint Set on 3D characterization and analysis of materials, Scripta Materialia, 55 (2006), 3
2. Torquato, S, Random heterogeneous materials: microstructure and macroscopic properties,
3. Marthisen, K., Fridy, J.M., Rouns, T.N., Lippert, K.B., Nes, E., Scripta Materialia, 39 (1998), 1177-1183.
4. Rollett, A.D., Campman, R., Saylor D., Materials Science Forum, Vols. 519-521 (2006), 1-10.