Calculation of back stress decrease caused by climb of Orowan loops in a dispersion hardened alloy
1978; University of Toronto Press; Volume: 26; Issue: 8 Linguagem: Inglês
10.1016/0001-6160(78)90003-2
ISSN1878-0768
Autores Tópico(s)Numerical methods in engineering
ResumoAbstract The distribution of the Orowan loops around spherical particles in a dispersion hardened material has been calculated from an analysis dealing with kinetics of the climb of the loops through the dislocation pipe diffusion. The Orowan loop distribution has been converted to an eigen-strain distribution inside the particle. After approximating the eigenstrain with the sum of a constant and a term proportional to the square of a coordinate, the back stress has been calculated by applying an inclusion problem of continuum mechanics. The calculation has been compared with experimental data of a Cu-SiO2 alloy and has been found to be in good agreement.
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