Evaluation of Microstructure and Mechanical Properties of Laser Beam Welded AISI 409M Grade Ferritic Stainless Steel

The microstructure analysis and mechanical properties evaluation of laser beam welded AISI 409M ferritic stainless steel joints are investigated. Single pass autogeneous welds free of volumetric defects were produced at a welding speed of 3 000 mm/min. The joints were subjected to optical microscope...

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Bibliographic Details
Published in:Journal of iron and steel research, international international, 2012, Vol.19 (1), p.72-78
Main Authors: Lakshminarayanan, AK, Balasubramanian, V
Format: Article
Language:English
Subjects:
AISI
Applied and Technical Physics
Base metal
Engineering
ferritic stainless steel
Ferritic stainless steels
impact property
Iron and steel industry
Laser beam welding
Machines
Manufacturing
Materials Engineering
Materials Science
Mechanical properties
Metallic Materials
Microstructure
Physical Chemistry
Processes
Scanning electron microscopy
Steels
tensile property
夏比冲击韧性
性能评价
机械性能
激光束焊接
组织
铁素体不锈钢
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Summary:The microstructure analysis and mechanical properties evaluation of laser beam welded AISI 409M ferritic stainless steel joints are investigated. Single pass autogeneous welds free of volumetric defects were produced at a welding speed of 3 000 mm/min. The joints were subjected to optical microscope, scanning electron fractographe, microhardness, transverse and longitudinal tensile, bend and charpy impact toughness testing. The coarse ferrite grains in the base metal were changed into dendritic grains as a result of rapid solidification of laser beam welds. Tensile testing indicates overmatching of the weld metal is relative to the base metal. The joints also exhibited acceptable impact toughness and bend strength properties.
ISSN:1006-706X
2210-3988
DOI:10.1016/S1006-706X(12)60050-8