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Erschienen in: Journal of Materials Engineering and Performance 3/2013

01.03.2013

Influence of Martensite Volume Fraction on Impact Properties of Triple Phase (TP) Steels

verfasst von: Ahmad Zare, A. Ekrami

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 3/2013

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Abstract

Ferrite-bainite-martensite triple phase (TP) microstructures with different volume fractions of martensite were obtained by changing heat treatment time during austempering at 300 °C. Room temperature impact properties of TP steels with different martensite volume fractions (V M) were determined by means of Charpy impact testing. The effects of test temperature on impact properties were also investigated for two selected microstructures containing 0 (the DP steel) and 8.5 vol.% martensite. Test results showed reduction in toughness with increasing V M in TP steels. Fracture toughness values for the DP and TP steels with 8.5 vol.% martensite were obtained from correlation between fracture toughness and the Charpy impact energy. Fractography of Charpy specimens confirmed decrease in TP steels’ toughness with increasing V M by considering and comparing radial marks and crack initiation regions at the fracture surfaces of the studied steels.

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Metadaten
Titel
Influence of Martensite Volume Fraction on Impact Properties of Triple Phase (TP) Steels
verfasst von
Ahmad Zare
A. Ekrami
Publikationsdatum
01.03.2013
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 3/2013
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-012-0312-2

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