Solidification behavior and microstructural analysis of austenitic stainless steel laser welds
Solidification behavior of austenitic stainless steel laser welds has been investigated with a high-power laser system. The welds were made at speeds ranging from 13 to 60 mm/s. The welds sowed a wide variety of microstructural features. The ferrite content in the 13-mm/s weld varied from less than 1% at the root of the weld to about 10% at the crown. The duplex structure at the crown of the weld was much finer than the one observed in conventional weld metal. However, the welds made at 25 and 60 mm/s contained an austenitic structure with less than 1% ferrite throughout the weld. Microstructural analysis of these welds used optical microscopy, transmission electron microscopy, and analytical electron microscopy. The austenitic stainless steel welds were free of any cracking, and the results are explained in terms of the rapid solidification conditions during laser welding.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6420264
- Report Number(s):
- CONF-810203-13
- Country of Publication:
- United States
- Language:
- English
Similar Records
Microstructural analysis of austenitic stainless steel laser welds
Microstructural modification of austenitic stainless steels by rapid solidification
Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
LASER WELDING
MATERIALS
MICROSTRUCTURE
NICKEL ALLOYS
STAINLESS STEEL-304L
STAINLESS STEEL-308
STAINLESS STEELS
STEELS
WELDED JOINTS
WELDING