  We have observed high-dispersion echelle spectra of red giant members in the
five open clusters NGC 1342, NGC 1662, NGC 1912, NGC 2354 and NGC 2447 and
determined their radial velocities and chemical compositions. These are the
first chemical abundance measurements for all but NGC 2447. We combined our
clusters from this and previous papers with a sample drawn from the literature
for which we remeasured the chemical abundances to establish a common abundance
scale. With this homogeneous sample of open clusters, we study the relative
elemental abundances of stars in open clusters in comparison with field stars
as a function of age and metallicity. We find a range of mild enrichment of
heavy (Ba-Eu) elements in young open cluster giants over field stars of the
same metallicity. Our analysis succinct that the youngest stellar generations
in cluster might be under-represented by the solar neighbourhood field stars.
