Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9796472 | Materials Science and Engineering: A | 2005 | 10 Pages |
Abstract
In comparison with the conventional AISI H11 tool steel, which contains approximately 1 wt.% silicon, the modified steel AISI H11 (â¼0.35 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.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
D. Delagnes, P. Lamesle, M.H. Mathon, N. Mebarki, C. Levaillant,