Visualization and Analysis of Variant Grouping in Continuously Cooled Low-Carbon Steel Welds

The variant grouping behavior of a simulated heat-affected zone in low-carbon steel was tracked in situ and analyzed by laser scanning confocal microscopy and electron backscatter diffraction. By visualizing the microstructural changes and crystallographic properties under rapid cooling conditions,...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2014-07, Vol.45 (8), p.3554-3559
Main Authors: Terasaki, Hidenori, Shintome, Yutaro, Takada, Atsushi, Komizo, Yu-ichi, Moriguchi, Koji, Tomio, Yusaku
Format: Article
Language:English
Subjects:
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cooling
Crystallography
Exact sciences and technology
Heat affected zone
Joining, thermal cutting: metallurgical aspects
Laser beam welding
Low carbon steel
Low carbon steels
Materials Science
Metallic Materials
Metallurgy
Metals. Metallurgy
Microstructure
Nanotechnology
Physical metallurgy
Structural Materials
Surfaces and Interfaces
Thin Films
Welding
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Summary:The variant grouping behavior of a simulated heat-affected zone in low-carbon steel was tracked in situ and analyzed by laser scanning confocal microscopy and electron backscatter diffraction. By visualizing the microstructural changes and crystallographic properties under rapid cooling conditions, the transition from Bain zone grouping to close-packed plane grouping was directly studied. The results were compared with those obtained under slow cooling and the link between the variant grouping behavior and the nested microstructure of lower bainite and martensite is clarified.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-014-2268-3