Enhancement of FeCrAl-ODS steels through optimised SPS parameters and addition of novel nano-oxide formers

• DOI: 10.1016/j.net.2024.02.018
• Publication Date: 2024-02-09T07:09:18Z
• Authors: A. Meza; E. Macía; M. Serrano; C. Merten; U. Gaitzsch; T. Weißgärber; M. Campos
• Keywords: Spark Plasma Sintering; Ductility (Earth science)

A novel approach to incorporating oxide formers into ferritic ODS production has been developed using the co-precipitation technique. This method enables tailored design of complex nano-oxides, integrated during Mechanical Alloying (MA) and precipitated Spark Plasma Sintering (SPS) consolidation. Findings illustrate that effectively produces nano-powders with customised compositions, enriching Y, Ti, Zr in grade condition subsequent precipitation. While addition Y–Ti–Zr–O nano-oxides did not prevent formation Y–Al–O Al-containing these were refined thanks presence well-dispersed Zr. Additionally, parameters optimised tailor bimodal grain size distribution steels, aiming for favourable strength-to-ductility ratios. Comprehensive microstructural analyses performed SEM, EDS, EBSD, TEM techniques, alongside mechanical assessments involving microtensile tests conducted at room temperature small punch carried out temperature, 300 °C, 500 °C. The outcomes yielded promising findings, showcasing similar or better performance conventionally manufactured steels. reinforces effectiveness success this innovative approach.