The effects of nanosized particles on microstructural evolution of an in-situ TiB2/6063Al composite produced by friction stir processing

Z Chen 1 J Li 2 Andras Borbely 3, 4, 5 G Ji 6 S.Y. Zhong 1 Y Wu 1 M.L. Wang 7 H.W. Wang 7, 1
1 Shanghai Jiao Tong University [Shanghai]
2 Inst Nucl Phys & Chem
3 LGF-ENSMSE - Laboratoire Georges Friedel
4 SMS-ENSMSE - Centre Science des Matériaux et des Structures
5 PMM-ENSMSE- Département Physique et Mécanique des Matériaux
6 UMET - Unité Matériaux et Transformations - UMR 8207
7 School of Mechanical Engineering Shanghai Jiao Tong University
Abstract : The homogenous redistribution of nanosized TiB2 particles in a fine-grained in-situ AA6063/TiB2 composite has been achievedby friction stir processing (FSP). The effects of TiB2 particles on as-deformed structure in the nugget zone and its thermal stability after additional T6 heat treatment are quantitatively evaluated by using neutron diffraction, scanning electron microscopy associated with electron backscatter diffraction and synchrotron X-ray line profile analysis. The results are compared to those obtained from a FSPed AA6063 alloy and, show first that, average grain size of the FSPedAA6063/TiB2 composite is smaller than that of the FSPed AA6063 alloy, while grain size distribution is more uniform. Second, dislocation density estimated in the FSPed AA6063/TiB2 composite is higher than that in the FSPed AA6063 alloy. Third, a small number of grains are dynamically recrystallized in the FSPed AA6063/TiB2 composite compared to its alloy counterpart, which indicates that recrystallization and grain growth during FSP and T6 heat treatment are effectively inhibited by the presence of nanosized TiB2 particles. (C) 2015 Elsevier Ltd. All rights reserved.
Keywords : Metal-matrix composites (MMCs) X-ray diffraction (XRD) Transmission electron microscopy (TEM) Neutron diffraction Friction stir processing SEVERE PLASTIC-DEFORMATION HIGH-PRESSURE TORSION MECHANICAL-PROPERTIES GRAIN-REFINEMENT ALUMINUM-ALLOYS TIB2 PARTICLES DISLOCATION DENSITY PROFILE ANALYSIS WELDED-JOINTS STRENGTH
Type de document :
Article dans une revue
Materials and Design, Elsevier, 2015, 88, pp. 999-1007 〈10.1016/j.matdes.2015.09.127 〉
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https://hal-emse.ccsd.cnrs.fr/emse-01500450
Contributeur : Géraldine Fournier-Moulin <>
Soumis le : lundi 3 avril 2017 - 11:57:53
Dernière modification le : mardi 23 octobre 2018 - 14:36:10

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Z Chen, J Li, Andras Borbely, G Ji, S.Y. Zhong, et al.. The effects of nanosized particles on microstructural evolution of an in-situ TiB2/6063Al composite produced by friction stir processing . Materials and Design, Elsevier, 2015, 88, pp. 999-1007 〈10.1016/j.matdes.2015.09.127 〉. 〈emse-01500450〉

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