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Título: | Friction stir welding of thick plates of aluminum alloy matrix composite with a high volume fraction of ceramic reinforcement |
Autor: | Cioffi, F.; Fernández, Ricardo CSIC ORCID CVN; Gesto, D.; Rey, Pilar; Verdera, D.; González-Doncel, Gaspar | Palabras clave: | Microstructures Joints/joining Mechanical properties Metal matrix composites |
Fecha de publicación: | 2013 | Editor: | Elsevier | Citación: | Composites Part A: Applied Science and Manufacturing 54: 117-123 (2013) | Resumen: | The microstructure and mechanical properties of joints conducted by friction stir welding, FSW, at different rotational speeds in thick plates of a composite material with a high volume fraction of reinforcement, namely 2124Al/25vol%SiCp, are studied. Original particle-free regions vanish during the stirring process, leading to a homogeneous particle distribution. Occasional breakage of some large particles occurs. Tunnel defects appear at low rpm, and disappear at high rotational speeds. The size of the thermo mechanically affected zone, TMAZ, increases with increasing rpm. Ductility of the welds in the range of 10-15% is achieved in compression tests whereas a rather brittle behavior is obtained in tension. A strength difference, SD, effect between compression and tensile test is obtained. This accounts for the little detrimental effect of the FSW process on the matrix-reinforcement interface. The SD effect is attributed to the presence of a microscopic residual stress. © 2013 Elsevier Ltd. All rights reserved. | URI: | http://hdl.handle.net/10261/112545 | DOI: | 10.1016/j.compositesa.2013.07.011 | Identificadores: | doi: 10.1016/j.compositesa.2013.07.011 issn: 1359-835X |
Aparece en las colecciones: | (CENIM) Artículos |
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