Fig. 23From: Effect of welding parameters on the mechanical and metallurgical properties of armor steel weldmentMicrostructure of single bevel welded joint using AWS A 5.9 ER 307 filler metal a Weld metal. b Martensite structure in weld metal zone. c Grain coarsening zone containing a martensitic structure in HAZ zone. d Over-tempering (softening zone) in HAZ zoneBack to article page