Effect of mechanical alloying on the microstructural evolution of a ferritic ODS steel with (Y–Ti–Al–Zr) addition processed by Spark Plasma Sintering (SPS)

• DOI: 10.1016/j.net.2021.02.002
• Publication Date: 2021-02-10T06:14:51Z
• Authors: E. Macía; A. García-Junceda; M. Serrano; S.J. Hong; M. Campos
• Keywords: Spark Plasma Sintering; Recrystallization (geology); Severe Plastic Deformation; Consolidation; Nanocrystalline material

The high-energy milling is one of the most extended techniques to produce Oxide dispersion strengthened (ODS) powder steels for nuclear applications. consequences high energy mill process on final powders can be measured by means deformation level, size, morphology and alloying degree. In this work, an ODS ferritic steel, Fe–14Cr–5Al–3W-0.4Ti-0.25Y2O3-0.6Zr, was fabricated using two different mechanical (MA) conditions (Mstd Mact) subsequently consolidated Spark Plasma Sintering (SPS). Milling were set evidence effectivity changing revolutions per minute (rpm) dwell time. Differences particle size distribution as well stored plastic observed, determining consolidation ability material achieved microstructure. Since recrystallization depends degree, composition each promoted oxide dispersion, a dual grain attained after SPS consolidation. Mact showed highest areas ultrafine regions when at 1100 °C. Microhardness small punch tests used evaluate under room temperature up 500 produced materials have remarkable properties conditions.