Indian Journal of Engineering and Materials Sciences511-

Gupta, M.

Qin, S.

Surappa, M.K.

Tham, L.M.

ScholarBank@NUS

Regarding the effect of aging heat treatment on the failure behaviour of a SiC reinforced Al based metal matrix composite

1-8<span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">In the present study, 6061
A1 metallic matrix was reinforced by 12.2 wt % of SiC particulates using liquid
metallurgy route. The composite material thus obtained was extruded and
characterized in the assolutionized and peak aged conditions in order to
delineate the effect of aging associated precipitation of secondary phases on
the tensile fracture behavior of the composite samples. The results of microstructural
characterization studies carried out using scanning electron microscope
revealed the increased presence of precipitated secondary phases in the
metallic matrix and a more pronounced interfacial segregation of alloying
elements in case of peak aged samples when compared to the assolutionized samples.
The results of the fractographic studies conducted on the as-solutionized
samples revealed that the failure was dominated by the SiC particulates
cracking while for the peak aged samples the fracture surface revealed a
comparatively more pronounced <span style="font-size:11.0pt;line-height:
115%;font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;="" mso-fareast-font-family:"times="" new="" roman";mso-fareast-theme-font:minor-fareast;="" mso-hansi-theme-font:minor-latin;mso-bidi-font-family:arial;mso-ansi-language:="" en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa;mso-bidi-font-style:="" italic"="">SiC/6061 <span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">AI debonding and reduced SiC
particulates cracking. This change in the failure behavior was rationalized in
terms of embrittlement of the interfacial region brought about by the aging
heat treatment and is correlated, in addition, with the mechanical properties
of the composite samples in as-solutionized and peak aged conditions.</span

Gupta, M

Surappa, M K

Qin, S

Tham, L M

NOPR

In the present study, 6061 Al metallic matrix was reinforced by 12.2 wt% df SiC particulates using liquid metallurgy route. The composite material thus obtained was extruded and characterized in the as-solutionized and peak aged conditions in order to delineate the effect of aging associated precipitation of secondary phases on the tensile fracture behavior of the composite samples. The results' of microstructural characterization studies carried out using scanning electron microscope revealed the increased presence of precipitated secondary phases in the metallic matrix and a more pronounced interfacial segregation of alloying elements in case of peak aged samples when compared to the as-solutionized samples. The results of the fractographic studies conducted on the as-solutionized samples revealed that the failure was dominated by the SiC particulates cracking while for the peak aged samples the fracture surface revealed a comparatively more pronounced SiC/6061 Al debonding and reduced SiC particulates cracking. This change in the failure behavior was rationalized in terms of embrittlement of the interfacial region brought about by the aging heat treatment and is correlated, in addition, with the mechanical properties of the composite samples in as-solutionized and peak aged conditions

Surappa, MK

Tham, LM

Name not available

Open Access Repository of IISc Research Publications

Regarding the effect of aging heat treatment on the failure behaviour of a SiC reinforced Al based metal matrix composite

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ScholarBank@NUS

NOPR

Name not available

Open Access Repository of IISc Research Publications