Metallographic Investigation on Postweld Heat-Treated0.21%C-1020 Steel Plates Joined by SMAW Method

Figure 5

Fractographic analysis of specimens broken though tensile test. Observation into (a) water-quenched specimen, (b) oil-quenched specimen, (c) sand-cooled specimen, and (d) air-cooled specimen.

(a)

(b)

(c)

(d)