Relationship between microstructure and mechanical properties of a 5% Cr tempered martensitic tool steel

Relevant microstructural characteristics ensuring a good mechanical strengthening up to 600 °C of a tempered martensitic steel containing 5% Cr (AISI H11) were investigated using transmission electron microscopy, energy-dispersive X-ray analysis, X-ray diffraction and extraction of carbides. Softeni...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2004-12, Vol.387, p.171-175
Main Authors: Mebarki, N., Delagnes, D., Lamesle, P., Delmas, F., Levaillant, C.
Format: Article
Language:English
Subjects:
Carbides
Engineering Sciences
Fatigue
Martensitic steel
Mechanics
Mechanics of materials
Second tempering
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Summary:Relevant microstructural characteristics ensuring a good mechanical strengthening up to 600 °C of a tempered martensitic steel containing 5% Cr (AISI H11) were investigated using transmission electron microscopy, energy-dispersive X-ray analysis, X-ray diffraction and extraction of carbides. Softening induced by tempering and cyclic loading is related to a strong reduction of the dislocation density estimated by X-ray peak profile analysis (modified Williamson Hall and modified Warren Averbach analysis). Moreover, the coalescence of chromium and vanadium carbides is involved in the yield strength decrease above 600 °C and during cyclic loading.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2004.02.073