Through-Thickness Residual Stresses, Microstructure, and Mechanical Properties of Electron Beam-Welded CA6NM Martensitic Stainless Steel after Postweld Heat Treatment

Table 2

Microstructural characteristics of CA6NM before EBW, after EBW, and after PWHT.

Zones	Microstructural features
	Martensite	Retained austenite (%)	δs
BM	Predominate	2.9	5%
	Tempered		Coarse primary stringers
As-welded FZ	Predominate	1.1	5%
	Retransformed		Fine secondary, interdendritic
PWHTed BM	Predominate	22.4	5%
	Tempered		Coarse primary stringers
PWHTed FZ	Predominate	10.2	5%
	Tempered		Fine, interdendritic

Presence between martensite lath is not resolvable using OM and/or SEM and fraction measured by XRD.