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Maraging steels are high-strength steels combined with good toughness. They are used particularly in aerospace and tooling applications. Maraging refers to the ageing of martensite, a hard microstructure commonly found in steels. Maraging steels: modelling of microstructure, properties and applications covers the following topics: Introduction to maraging steels; Microstructure of maraging steels; Mechanical properties of maraging steels; Thermodynamic calculations for quantifying the phase fraction and element partition in maraging systems and precipitation hardening steels; Quantification of phase transformation kinetics in
The third in a series of meetings to review the technical status of the high-nickel maraging steels was held on July 24 and 25, 1963, at the Biltmore Hotel in Dayton, Ohio. Again, the purpose of this review was to discuss the technical progress which has been made with the maraging steels, not only since the previous review but also in the sum total. The ultimate objective was to determine the pertinent properties of these steels, to delineate the optimum techniques for processing
The fine-scale microstructures of the 18Ni(250) and 18Ni(300) grades of maraging steel have been examined using electron microscopy of thin foils and extraction replicas in conjunction with electron-diffraction and electron-probe analyses of particles extracted from these steels. The microstructure of both steels in the annealed condition consists of small, equiaxed martensite grains containing a high dislocation density but few microtwins. The main source of the strengthening that occurs in these steels during aging is the precipitation of extremely fine particles