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Microstructure and mechanical properties of AA7039+20%SiC w composite
Author(s) -
BLAZ L.,
KULA A.,
KANEKO J.,
SUGAMATA M.,
WLOCH G.,
SOBOTA K.
Publication year - 2010
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.2009.03276.x
Subject(s) - microstructure , materials science , composite material
Summary Hot deformation tests were performed on an AA7039‐matrix composite reinforced with a 20% addition of SiC whiskers. The flow stress maximum was reduced with deformation temperature from 640 MPa to ∼8 MPa at 293 K and 823 K, respectively. TEM observations, performed on as deformed samples, revealed a highly recovered substructure of the matrix and a striated structure of the whiskers. The fringes, which are perpendicular to the whiskers’ longitudinal axis, were ascribed to nano‐sized twins and stacking faults formed during the crystal growth rather than to some effects of the deformation process.