Morphologies of the transition region in dissimilar austenitic-ferritic welds

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Materials Characterization

DOI:https://doi.org/10.1016/1044-5803(95)00249-9· OSTI ID:230693

Pan, C; Zhang, Z ^[1]

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1. Wuhan Transportation Univ., Wuhan, Hubei (China). Lab. of Electron Microscopy

The morphology of the transition region in dissimilar austenitic-ferritic steel welds has been characterized using scanning and transmission electron microscopy and using energy-dispersive X-ray spectrometry. With increasing base metal carbon content, a martensite-like layer in the unmixed zone of this region diminishes or disappears, and a saw-tooth-like morphology extends form the partially melted zone into the weld. The number of weld interfaces also changes with variation in carbon content, from the double austenite/martensite-like and martensite-like/ferrite interfaces to a single austenite/martensite-like one. These variations are attributed to the local melting range of the base metal, which depends upon the carbon content, cooling rate, and alloy element segregation.

• OSTI ID: 230693
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: 1 Vol. 36; ISSN MACHEX; ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITIC STEELS
CARBON
FERRITIC STEELS
INTERFACES
LAYERS
LIQUID METALS
MARTENSITE
MORPHOLOGY
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
SEGREGATION
TRANSMISSION ELECTRON MICROSCOPY
WELDED JOINTS
X-RAY SPECTROSCOPY