Vickers Hardness and Positron Annihilation Study of Eurofer97 and ODS Eurofer

Bartošová, I; Čı́žek, J.; Lukáč, František; Slugeň, V.

doi:10.12693/aphyspola.125.702

Cited by 6 publications

(1 citation statement)

References 10 publications

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“…However, the method is limited by the small volume sampled, in addition to problems with quantification when the dislocation density is high [ 63 ]. Other methods such as diffraction peak profile analysis [ 64 , 65 ] and positron annihilation spectroscopy [ 65 , 66 , 67 , 68 ] have shown some success in investigating the martensitic structure. In addition, SAS technique using low q -values (such as USANS) may prove an effective method of quantification in the future.…”

Section: Discussionmentioning

confidence: 99%

The Effect of a Two-Stage Heat-Treatment on the Microstructural and Mechanical Properties of a Maraging Steel

et al. 2017

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Maraging steels gain many of their beneficial properties from heat treatments which induce the precipitation of intermetallic compounds. We consider here a two-stage heat-treatment, first involving austenitisation, followed by quenching to produce martensite and then an ageing treatment at a lower temperature to precipitation harden the martensite of a maraging steel. It is shown that with a suitable choice of the initial austenitisation temperature, the steel can be heat treated to produce enhanced toughness, strength and creep resistance. A combination of small angle neutron scattering, scanning electron microscopy, electron back-scattered diffraction, and atom probe tomography were used to relate the microstructural changes to mechanical properties. It is shown that such a combination of characterisation methods is necessary to quantify this complex alloy, and relate these microstructural changes to mechanical properties. It is concluded that a higher austenitisation temperature leads to a greater volume fraction of smaller Laves phase precipitates formed during ageing, which increase the strength and creep resistance but reduces toughness.

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