Influence of silicon content on the precipitation of secondary carbides and fatigue properties of a 5%Cr tempered martensitic steel

Abstract : in comparison with the conventional AISI H11 tool steel, which contains approximately 1 wt.% silicon, the modified steel AISI H11 (similar to 0.35 wt.% silicon) exhibits improved tensile and fatigue properties at 550 degrees C - the estimated tool surface temperature during the high-pressure injection of aluminium alloys. The effect of silicon on the stability of secondary carbides was studied using transmission electron microscopy and small-angle neutron scattering. Silicon has a considerable influence on the precipitation of secondary carbides. A higher volume fraction and density of small particles were observed in the low-silicon-grade steel, both after heat treatment and after fatigue testing. The final discussion focuses on the influence of silicon in the precipitation sequence. It is concluded that silicon has a detrimental effect as it shifts the secondary hardening peak towards lower tempering temperatures.
Document type :
Journal articles
Complete list of metadatas

Cited literature [26 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01715084
Contributor : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Submitted on : Friday, March 15, 2019 - 11:30:19 AM
Last modification on : Monday, April 29, 2019 - 4:03:35 PM

File

influence-of-silicon-content.p...
Files produced by the author(s)

Identifiers

Citation

Denis Delagnes, Pascal Lamesle, M. H. Mathon, N Mebarki, Christophe Levaillant. Influence of silicon content on the precipitation of secondary carbides and fatigue properties of a 5%Cr tempered martensitic steel. Materials Science and Engineering: A, Elsevier, 2005, 394 (1-2), pp.435-444. ⟨10.1016/j.msea.2004.11.050⟩. ⟨hal-01715084⟩

Share

Metrics

Record views

137

Files downloads

87