TY - JOUR
T1 - Transient creep behavior of a metal matrix composite with a dilute concentration of randomly oriented spheroidal inclusions
AU - Wang, Y. M.
AU - Qiu, Y. P.
AU - Weng, G. J.
N1 - Funding Information:
This work was supported by the National Science Foundation, under Grants MSS-8918235 and MSS-9114745.
PY - 1992
Y1 - 1992
N2 - The transient creep behavior of a metal matrix composite containing a dilute concentration of randomly oriented spheroidal inclusions is derived explicitly from the constitutive equation of the matrix. This theory can account for the influence of inclusion shape, elastic inhomogeneity between both phases, and the volume fraction of inclusions. The micro-macro transition is carried out by considering the mechanics of incremental creep, which discloses the nature of stress relaxation in the ductile matrix and the connection between the micro and macro creep strains. The transient creep curves of the composite are displayed with several inclusion shapes. Consistent with the known elastic behavior, spherical inclusions are found to provide the weakest reinforcing effect, whereas thin, circular discs possess the most effective strengthening shape. According to this theory and in line with the experimental data, the creep resistance of cobalt at 500°C can improve by more than 80% after adding a mere 5% of rutile particles into it.
AB - The transient creep behavior of a metal matrix composite containing a dilute concentration of randomly oriented spheroidal inclusions is derived explicitly from the constitutive equation of the matrix. This theory can account for the influence of inclusion shape, elastic inhomogeneity between both phases, and the volume fraction of inclusions. The micro-macro transition is carried out by considering the mechanics of incremental creep, which discloses the nature of stress relaxation in the ductile matrix and the connection between the micro and macro creep strains. The transient creep curves of the composite are displayed with several inclusion shapes. Consistent with the known elastic behavior, spherical inclusions are found to provide the weakest reinforcing effect, whereas thin, circular discs possess the most effective strengthening shape. According to this theory and in line with the experimental data, the creep resistance of cobalt at 500°C can improve by more than 80% after adding a mere 5% of rutile particles into it.
KW - high-temperature deformation
KW - inclusion shape effect
KW - metal-matrix composites
KW - particle-strengthening of creep resistance
KW - transient creep
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U2 - 10.1016/0266-3538(92)90066-C
DO - 10.1016/0266-3538(92)90066-C
M3 - Article
AN - SCOPUS:38249014109
SN - 0266-3538
VL - 44
SP - 287
EP - 297
JO - Composites Science and Technology
JF - Composites Science and Technology
IS - 4
ER -