| Issue |
Rev. Met. Paris
Volume 99, Number 5, May 2002
Science et Génie des MatériauxFatigue et environnement |
|
|---|---|---|
| Page(s) | 481 - 489 | |
| DOI | https://doi.org/10.1051/metal:2002166 | |
| Published online | 25 October 2002 | |
Structural hardening mechanisms of lead-cadmium-calcium alloys for battery grids
It is known that age-hardening in lead-calcium alloys proceeds in two stages. The first corresponds to two concomitant hardening transformations of discontinuous type and without precipitation. The second, is a lamellar reaction of precipitation of Pb3Ca. The ageing of lead-cadmium alloys is characterized by a continuous precipitation and a discontinuous transformation. The hardening process is followed by an overaging which consists of a discontinuous transformation with a reprecipitation of the Cd from the fine hardening precipitates of the same phases. With an aim of improving the mechanical and electrochemical properties of Pb-Ca alloys, we undertook a study of the influence of minor additions of cadmium on the age-hardening of these alloys. Two structural states were considered: as-cast condition, rehomogenized condition.
© La Revue de Métallurgie, 2002
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