EFFECT OF ELONGATED GRAPHITE ON MECHANICAL-PROPERTIES OF HOT-ROLLED DUCTILE IRON

The mechanical properties of hot-rolled and then annealed ductile iron were evaluated. The deformation of this two-phase material and the ef fects of the elongated graphite spheres on the mechanical properties a nd the development of anisotropy of mechanical properties were studied . An attempt was made to describe the anisotropy of tensile strength i n terms of the deformation of graphite spheres and of the root curvatu re, area fraction, and the interbridges that result in disproportional changes of stress concentration, loading capacity, and the tendency t o break the interbridges and link the neighboring deformed graphite sp heres.