Publication

Mechanical dispersion of Y2O3 nanoparticles in steel EUROFER 97: process and optimisation

Maximo Pedro Victoria
2003
Journal Articles

Abstract

The procedures followed to produce Y2O3-dispersed EUROFER 97 powder ready to be compacted and hot isostatic pressing processed are reported. An attrition mill has been used under controlled conditions. The compositional and microstructural characterization of the Y2O3/EUROFER powder along the different steps of the milling process has allowed optimising the processing conditions to obtain a nanosized Y2O3 dispersion. TEM observations performed on Y2O3/EUROFER powder milled under these specific conditions reveal the presence of monoclinic Y2O3 dispersoids having sizes around 10 nm in the ferrite/martensite matrix. (C) 2003 Elsevier B.V. All rights reserved.

Official source

https://infoscience.epfl.ch/entities/publication/7ee75940-206d-446f-a39b-c81eab73139f

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Maximo Pedro Victoria
2003
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7ee75940-206d-446f-a39b-c81eab73139f

About this result

Related concepts (15)

Austenite

Austenite, also known as gamma-phase iron (γ-Fe), is a metallic, non-magnetic allotrope of iron or a solid solution of iron with an alloying element. In plain-carbon steel, austenite exists above the critical eutectoid temperature of 1000 K (727 °C); other alloys of steel have different eutectoid temperatures. The austenite allotrope is named after Sir William Chandler Roberts-Austen (1843–1902); it exists at room temperature in some stainless steels due to the presence of nickel stabilizing the austenite at lower temperatures.

Alloy steel

Alloy steel is steel that is alloyed with a variety of elements in total amounts between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low alloy steels and high alloy steels. The difference between the two is disputed. Smith and Hashemi define the difference at 4.0%, while Degarmo, et al., define it at 8.0%. Most commonly, the phrase "alloy steel" refers to low-alloy steels. Strictly speaking, every steel is an alloy, but not all steels are called "alloy steels".

Steel

Steel is an alloy of iron and carbon with improved strength and fracture resistance compared to other forms of iron. Many other elements may be present or added. Stainless steels, which are resistant to corrosion and oxidation, typically need an additional 11% chromium. Because of its high tensile strength and low cost, steel is used in buildings, infrastructure, tools, ships, trains, cars, bicycles, machines, electrical appliances, furniture, and weapons. Iron is the base metal of steel.

Related publications (1)

Mechanical dispersion of Y2O3 nanoparticles in steel EUROFER 97: process and optimisation

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