Structural hardening mechanisms of lead-cadmium-calcium alloys for battery grids E. Saad, I. Bouirden, E. Hilali, N. Selhaoui, K. Mahdouk, A. Aharoune and A. Bourkba Rev. Met. Paris, 99 5 (2002) 481-489 Published online: 25 October 2002 DOI: 10.1051/metal:2002166