Microstructure evolution and fracture mechanism of H13 steel during high temperature tensile deformation

It is known that mechanical properties of hot working die steel deteriorate during service due to dynamic recovery, recrystallization and plastic deformation of tempered martensite. In order to clarify the associated microstructure evolution and fracture mechanism, a systematic investigation was car...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2019-02, Vol.746, p.127-133
Main Authors: Wang, Yao-li, Song, Ke-xing, Zhang, Yan-min, Wang, Guang-xin
Format: Article
Language:English
Subjects:
Carbides
Crack propagation
Deformation mechanisms
Die steels
Dynamic recrystallization
Evolution
Fracture mechanics
Fracture mechanism
H13 steel
Heat resistant steels
Heat treating
High temperature
High temperature tensile deformation, Microstructure evolution
Hot working
Mechanical properties
Microstructure
Plastic deformation
Tempered martensite
Tensile deformation
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Summary:It is known that mechanical properties of hot working die steel deteriorate during service due to dynamic recovery, recrystallization and plastic deformation of tempered martensite. In order to clarify the associated microstructure evolution and fracture mechanism, a systematic investigation was carried out on a widely used hot working die steel. Samples were tensile deformed at different temperatures ranging from 25 ℃ to 640 ℃ and examined using SEM and TEM. Results obtained have shown that mechanical properties as well as fracture mode change with increasing testing temperature. These phenomena have been elaborated together with microstructure evolution during high temperature deformation. Deformation mechanisms and roles of different carbides in crack formation and propagation have been discussed.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2019.01.027