Development of high performance powder metallurgy steels by high-energy milling

Torralba, J. M.; Fuentes-Pacheco, L.; García-Rodríguez, Nerea; Campos, Mónica

doi:10.1016/j.apt.2012.11.015

Cited by 32 publications

(8 citation statements)

References 24 publications

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“…This improvement is clearly due to the precipitation of Zr nano-oxides with different compositions, which are able to generate an Orowan strengthening by pinning effectively the movement of the dislocations created during the plastic deformation of the steel. The values reached are promising since they are higher than those reported in the literature for the hipped U14YW (14 wt.% Cr) and the hot extruded PM2000 (20 wt.% Cr) ODS steels, and in the range of the hot extruded MA957 (14 wt.% Cr) and 14GET (14 wt.% Cr) ODS alloys [33][34][35][36]. In addition, SP tests are performed on the ODS steels sintered by SPS in order to analyse more deeply the influence of the Zr nano-oxides on the mechanical behaviour of these materials.…”

Section: Mechanical Characterisation Of Sps Ods Alloysmentioning

confidence: 55%

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Effect of Small Variations in Zr Content on the Microstructure and Properties of Ferritic ODS Steels Consolidated by SPS

García-Junceda

Maciá

Garbiec

et al. 2020

Metals

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Two different zirconium contents (0.45 and 0.60 wt.%) have been incorporated into a Fe-14Cr-5Al-3W-0.4Ti-0.25Y2O3 oxide dispersion-strengthened (ODS) steel in order to evaluate their effect on the final microstructure and mechanical properties. The powders with the targeted compositions were obtained by mechanical alloying (MA), and subsequently processed by spark plasma sintering (SPS) at two different heating rates: 100 and 400 °C·min−1. Non-textured bimodal microstructures composed of micrometric and ultrafine grains were obtained. The increase in Zr content led to a higher percentage of Zr nano-oxides and larger regions of ultrafine grains. These ultrafine grains also seem to be promoted by higher heating rates. The effective pinning of the dislocations by the Zr dispersoids, and the refining of the microstructure, have significantly increased the strength exhibited by the ODS steels during the small punch tests, even at high temperatures (500 °C).

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Section: Mechanical Characterisation Of Sps Ods Alloysmentioning

confidence: 55%

“…Metals 2020, 10, 348 8 of 13 Figure 6. Microhardness of the ODS steels developed in this investigation and some ODS steels from the literature [33][34][35][36].…”

Section: Mechanical Characterisation Of Sps Ods Alloysmentioning

confidence: 99%

Effect of Small Variations in Zr Content on the Microstructure and Properties of Ferritic ODS Steels Consolidated by SPS

García-Junceda

Maciá

Garbiec

et al. 2020

Metals

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“…The upper limit of detectable crystallite size was set at 100 nm, which corresponds to the resolution limit of the experimental set up. The initial crystallite size is 20.3 nm for the unreinforced grade whereas it slightly decreases with the amount of yttrium and titanium, which tends to prove that increasing the amount of oxide forming solutes refines the microstructure during mechanical alloying [22]. Mechanical alloying of ODS steels involves the milling of one ductile metallic phase with a brittle oxide.…”

Section: In Situ Synchrotron Xrdmentioning

confidence: 98%

Influence of oxide volume fraction on abnormal growth of nanostructured ferritic steels during non-isothermal treatments: An in situ study

Boulnat¹,

Sallez²,

Dadé³

et al. 2015

Acta Materialia

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“…With nanoparticles reinforcement also high-temperature performance can be improved because of the dispersion of thermally stable ceramic nano-particles [19,20]. At present, several methods are used to produce nano-particles reinforced materials, including the powder metallurgy process based mechanical alloying with high energy milling, a non-conventional vortex liquid metal casting process and ultrasonic cavitation-based solidification [21][22][23].…”

Section: Introductionmentioning

confidence: 99%