Influence of silicon content on the precipitation of secondary carbides and fatigue properties of a 5%Cr tempered martensitic steel
Denis Delagnes,Denis Delagnes,Pascal Lamesle,Marie-Hélène Mathon,N Mebarki,N Mebarki,Christophe Levaillant +6 more
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TLDR
In this paper, the effect of silicon on the stability of secondary carbides was studied using transmission electron microscopy and small-angle neutron scattering, and it was concluded that silicon has a detrimental effect as it shifts the secondary hardening peak towards lower tempering temperatures.Abstract:
In comparison with the conventional AISI H11 tool steel, which contains approximately 1 wt.% silicon, the modified steel AISI H11 (∼0.35 wt.% silicon) exhibits improved tensile and fatigue properties at 550 °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.read more
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The effect of the addition of alloying elements on carbide precipitation and mechanical properties in 5% chromium martensitic steels
Pierre Michaud,Pierre Michaud,Denis Delagnes,Denis Delagnes,Pascal Lamesle,Marie-Hélène Mathon,Christophe Levaillant +6 more
TL;DR: In this paper, small angle neutron scattering and X-ray diffraction experiments, as well as transmission electron microscopy, were performed to characterize the precipitation of nanometric carbides, and the mechanical properties showed that the volume fraction of small precipitates directly influences the mechanical resistance at high temperature but has a detrimental effect on Charpy impact energy.
Journal ArticleDOI
High-temperature properties and microstructural stability of hot-work tool steels
TL;DR: In this article, the softening properties of tool steels with respect to their microstructure and high-temperature mechanical properties were investigated by tempering and isothermal fatigue testing.
Journal ArticleDOI
In-situ strengthening of a high strength low alloy steel during Wire and Arc Additive Manufacturing (WAAM)
Tiago A. Rodrigues,Valdemar R. Duarte,D. Tomás,J. A. Avila,J.D. Escobar,Emma Rossinyol,N. Schell,Telmo G. Santos,João Pedro Oliveira +8 more
TL;DR: In this article, SiC particles were added to the molten pool during WAAM of a high strength low alloy steel, and the introduction of these high melting point particles promoted grain refinement and precipitation of Fe3C due to SiC dissociation.
Journal ArticleDOI
The effect of silicon on precipitation and decomposition behaviors of M6C carbide in a Ni–Mo–Cr superalloy
TL;DR: In this paper, the effect of silicon addition on the precipitation and decomposition behaviors of M 6 C carbide in a Ni-Mo-Cr based superalloy and the tensile properties of this alloy have been investigated.
Journal ArticleDOI
The effects of annealing temperature and cooling rate on carbide precipitation behavior in H13 hot-work tool steel
TL;DR: In this article, the precipitation behavior of H13 hot-work tool steel was investigated as a function of both annealing temperature and cooling rate through thermodynamic calculations and microstructural analyses using transmission and scanning electron microscope and a dilatometer.
References
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