Effect of Heat Input on Microstructure and Hardness Distribution of Laser Welded Si-Al TRIP-Type Steel
Figure 5
Microstructures of fusion zones (a), (c), and (e) and HAZ (b), (d), and (f) registered for the various heat input values; FZ: fusion zone, HAZ: heat affected zone, BM: base metal, α: ferrite, : retained austenite, M-A: martensitic-austenitic constituents, M: martensite, B-M-A: bainitic-martensitic-austenitic regions; white circles indicate nonmetallic inclusions.
