Experimental technique for plasticity diagrams plotting

A new technique of plotting a curve of plasticity limit is proposed. The technique may be used for low ductility steels and alloys as well as for low temperature conditions. The λf-Kr diagrams (λf - shear strain at the instant of fracture; K2 - coefficient of rigidity of stress state) are presented for titanium alloy VT3-1 and aluminium alloy D16