Osmond, C. R., 1899, 128, 1513.
Osmond.) Silver-copper [copper= 15% silver - 85%] reheated to purple colour.
- (Osmond.) Pearlite, steel (carbon about r%) forged and annealed at 800° C. Magnified 1000 diameters.
- (Osmond & Cartaud.) Martensite.
- (Osmond.) Martensite (black) in austensite (white).
Osmond, shows the structure of a silver-copper alloy containing considerably Eutectic more silver than the eutectic.
Osmond showed that the wonderful changes which thermal treatment andthe presence of certain foreign elements cause were due to allotropy, and from these and like teachings have come a rapid growth of the use of the so-called " alloy steels " in which, thanks to special composition and treatment, the iron exists in one or more of its remarkable allotropic states.