Influence of Carbide Precipitation and Dissolution on the Microstructure of Ultra-Fine-Grained Intercritically Annealed Medium Manganese Steel

The influence of cementite precipitation and dissolution on the formation of the carbide-free, ultra-fine-grained, ferrite + austenite microstructure of medium manganese steel was analyzed. During heating to the intercritical temperature, cementite nucleates at low-angle lath martensite boundaries,...

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Bibliographic Details
Published inMetallurgical and materials transactions. A, Physical metallurgy and materials science Vol. 47; no. 7; pp. 3263 - 3270
Main Authors Lee, Sangwon, De Cooman, Bruno C.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.07.2016
Springer Nature B.V
Subjects
Characterization and Evaluation of Materials
Chemical precipitation
Chemistry and Materials Science
Communication
Dissolution
Manganese steel
Materials Science
Metallic Materials
Metallurgy
Microstructure
Nanotechnology
Structural Materials
Surfaces and Interfaces
Thin Films
Ferrite
Martensite
Cementite
Austenite
Intercritical Annealing
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Summary:The influence of cementite precipitation and dissolution on the formation of the carbide-free, ultra-fine-grained, ferrite + austenite microstructure of medium manganese steel was analyzed. During heating to the intercritical temperature, cementite nucleates at low-angle lath martensite boundaries, austenite subsequently nucleates at ferrite/cementite boundaries, and the cementite is gradually replaced by the growing austenite grains. The intercritical austenite carbon is therefore due to cementite dissolution, rather than carbon partitioning between ferrite and austenite.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-016-3507-6