METASTABLE PHASES OBTAINED BY HIGH POWER LASER SURFACE MELTING OF CAST-IRON AND STEELS E. Ramous, L. Giordano, G. Principi and A. Tiziani J. Phys. Colloques, 44 C5 (1983) C5-501-C5-505 DOI: 10.1051/jphyscol:1983573