Study on the key role of hierarchical microstructure for strength and plasticity in a lath martensitic steel

In this paper, the effect of substructure of lath martensite on the mechanical properties was discussed in detail. Results indicated that prior austenite grain, packet and block increase with the increasing of quenching temperature. A good linear relationship exists between the packet, block and pri...

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Bibliographic Details
Published inIOP conference series. Materials Science and Engineering Vol. 324; no. 1; pp. 12043 - 12047
Main Authors Yang, Ming, Long, Shao-lei, Liang, Yi-long
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2018
Subjects
Austenite
Heat treating
Martensitic stainless steels
Mechanical properties
Plastic properties
Temperature
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Summary:In this paper, the effect of substructure of lath martensite on the mechanical properties was discussed in detail. Results indicated that prior austenite grain, packet and block increase with the increasing of quenching temperature. A good linear relationship exists between the packet, block and prior austenite, which reveal that the size of packet, block depends on prior austenite grain. However, lath is increased with not determined by prior austenite grain. Based on the EBSD analysis, the large ratio of the low angle orientation boundaries determines the better plasticity is obtained in coarse grain. Therefore, the refining of martensite lath or the increase of the low angle orientation plays an important role on improving the plasticity in lath martensite steel.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/324/1/012043