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Title: Influence of extrusion temperature on the aging behavior of 6061Al-15vol%SiC{sub w} composites

Abstract

It is known that some discontinuously reinforced metal matrix composites, MMCs, with precipitation hardenable matrices, like 6061Al with SiC whiskers or particles, show faster aging behavior than the unreinforced alloys. Regarding the influence of processing techniques on the aging behavior, some investigations have found acceleration on aging of materials consolidated by powder metallurgy (PM) with respect to materials consolidated by ingot metallurgy (IM). This was attributed to the higher presence of oxide inclusions in the PM than in the IM materials. For a given composite preparation technique, however, the influence of the processing variables on the aging response has been barely studied. In this work, the effect of extrusion temperature on the aging of 6061Al-15vol%SiC{sub w} composites processed by a powder metallurgy route is investigated. The results obtained in this research go deep into the influence of the dislocation density on both the accelerated aging and the increase in strength of composites. Whereas the effect of dislocation density on accelerated aging is well documented, its effect on the strength of MMCs is not yet clear.

Authors:
; ; ; ;  [1]
  1. Centro Nacional de Investigaciones Metalurgicas, Madrid (Spain). Dept. de Metalurgia Fisica
Publication Date:
OSTI Identifier:
201052
Resource Type:
Journal Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 34; Journal Issue: 3; Other Information: PBD: 1 Feb 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; EXTRUSION; AGING; ALUMINIUM BASE ALLOYS; DISLOCATIONS; SILICON CARBIDES; POWDER METALLURGY; TEMPERATURE DEPENDENCE; MECHANICAL PROPERTIES; PRECIPITATION; NUCLEATION; GRAIN GROWTH; DIFFUSION

Citation Formats

Borrego, A, Ibanez, J, Lopez, V, Lieblich, M, and Gonzalez-Doncel, G. Influence of extrusion temperature on the aging behavior of 6061Al-15vol%SiC{sub w} composites. United States: N. p., 1996. Web. doi:10.1016/S0956-716X(95)00542-4.
Borrego, A, Ibanez, J, Lopez, V, Lieblich, M, & Gonzalez-Doncel, G. Influence of extrusion temperature on the aging behavior of 6061Al-15vol%SiC{sub w} composites. United States. https://doi.org/10.1016/S0956-716X(95)00542-4
Borrego, A, Ibanez, J, Lopez, V, Lieblich, M, and Gonzalez-Doncel, G. 1996. "Influence of extrusion temperature on the aging behavior of 6061Al-15vol%SiC{sub w} composites". United States. https://doi.org/10.1016/S0956-716X(95)00542-4.
@article{osti_201052,
title = {Influence of extrusion temperature on the aging behavior of 6061Al-15vol%SiC{sub w} composites},
author = {Borrego, A and Ibanez, J and Lopez, V and Lieblich, M and Gonzalez-Doncel, G},
abstractNote = {It is known that some discontinuously reinforced metal matrix composites, MMCs, with precipitation hardenable matrices, like 6061Al with SiC whiskers or particles, show faster aging behavior than the unreinforced alloys. Regarding the influence of processing techniques on the aging behavior, some investigations have found acceleration on aging of materials consolidated by powder metallurgy (PM) with respect to materials consolidated by ingot metallurgy (IM). This was attributed to the higher presence of oxide inclusions in the PM than in the IM materials. For a given composite preparation technique, however, the influence of the processing variables on the aging response has been barely studied. In this work, the effect of extrusion temperature on the aging of 6061Al-15vol%SiC{sub w} composites processed by a powder metallurgy route is investigated. The results obtained in this research go deep into the influence of the dislocation density on both the accelerated aging and the increase in strength of composites. Whereas the effect of dislocation density on accelerated aging is well documented, its effect on the strength of MMCs is not yet clear.},
doi = {10.1016/S0956-716X(95)00542-4},
url = {https://www.osti.gov/biblio/201052}, journal = {Scripta Materialia},
number = 3,
volume = 34,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 1996},
month = {Thu Feb 01 00:00:00 EST 1996}
}