The formation and evolution of oxide particles in oxide-dispersion-strengthened ferritic steels during processing

Williams, Ceri A.; Unifantowicz, Paulina; Baluc, N.; Smith, G.D.W.; Marquis, Emmanuelle A.

doi:10.1016/j.actamat.2012.12.042

Cited by 145 publications

(68 citation statements)

References 51 publications

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“…[29] The additional spots in Figure 1 With encouraging results from melt spinning and internal oxidation of the MS01 ribbons, MS02 ribbons were produced with 15 times higher throughput, reduced Y concentration, and addition of Ti that is known to produce a refining effect of Y-rich oxides in mechanical alloying. [30][31][32] As shown in Figure 2(a), MS02 ribbons had a thickness of approximately 25 lm, which was comparable with the smaller-scale MS01 ribbons. However, there were now resolvable micron-sized equiaxed grains at the wheel side, and again largely featureless columnar grains growing against the 1D heat flow, and then a region of a more obvious microsegregation and dendritic structure towards the free side.…”

Section: Resultsmentioning

confidence: 60%

Development of a Novel Melt Spinning-Based Processing Route for Oxide Dispersion-Strengthened Steels

Hong

Morrison

Zhang

et al. 2017

Metall Mater Trans A

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Melt spinning of an Fe-5Y and Fe-1Y-1Ti (wt pct) alloy produced a relatively uniform spatial distribution of Y and Ti in solid solution and ribbons with consistent yield (>60 pct by weight), fast processing time (< 10 seconds), good scalability (up to > 100 g feedstock material), and repeatability. Heat treatment in the presence of Fe 2 O 3 as an oxygen source (Rhines pack method) at 973 K validated the potential of forming < 20 nm Y-rich oxides in the Fe-5Y ribbons. Pulverized Fe-1Y-1Y ribbons were consolidated to bulk using the field-assisted sintering technique (FAST) incorporating nano-sized Fe 3 O 4 powder as the oxygen source. After FAST at 1273 K, 50 MPa, and 30 minutes, a comparatively high number density of sub-micron Y and/or Ti-rich oxides were developed. Further formation of fine-scale oxides took place during post-FAST annealing, resulting in an approximate 20 pct increase in hardness at temperatures below 573 K, but with a reduced hardening effect above 673 K due to a small fraction of persistent porosity and mechanically weak prior ribbon boundaries that were decorated with Ti-rich oxides.

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Section: Resultsmentioning

confidence: 60%

Development of a Novel Melt Spinning-Based Processing Route for Oxide Dispersion-Strengthened Steels

Hong

Morrison

Zhang

et al. 2017

Metall Mater Trans A

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show abstract

“…Basically, the formation of these dispersoids within the sample matrix is influenced by the solubility equilibrium of O element in the matrix. In other words, the formation of dispersoids in ODS ferritic steel matrix is triggered by the oxidation reaction resulted from the energy change as reported by Williams et al (2013). FESEM image of 1Y (Fe-12Cr-1Y 2 O 3 ) shows the formations of dispersoids within the sample matrix with the precipitates size between 9 and 30 nm as illustrated in Figure 3(a).…”

Section: Crystal Structure and Morphology Of Samplesmentioning

confidence: 91%

“…At this annealing temperature, the strengthening dispersoids within both samples matrix exhibit coarsening as it exposed to very high temperature. This phenomenon known as Ostwald-ripening which has been triggered by the chemical potential differences related to the energy in lattice structure that will increase once it exposed to very high temperature (Williams et al 2013).…”

Section: Hardness (Hv02) Of Ods Ferritic Steel Samplesmentioning

confidence: 99%

The Effect of Annealing to the Hardness of High Y2O3-Oxide Dispersion Strengthened (ODS) Ferritic Steels

Shamsudin

Radiman²,

Abdullah

et al. 2018

JSM

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Tujuan kajian ini dijalankan adalah untuk mengkaji kesan sepuh lindap terhadap kekerasan keluli ferit ODS-Y 2 O 3 tinggi. Sampel bagi kajian ini telah dibangunkan dengan menggunakan kaedah pengaloian mekanik dan diikuti dengan kaedah Tekan Isostasi Sejuk (CIP). Selepas proses pemampatan, sampel didedahkan dengan rawatan haba pada suhu 1100°C selama 1 jam di dalam relau pembakaran. Struktur kristal dan morfologi sampel masing-masing telah dianalisis dengan menggunakan Meter Belauan Sinar-X (XRD) dan dicirikan dengan menggunakan mikroskop elektron pengimbas pancaran medan (FESEM

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“…If second-phase particles are of suitable size with a uniform distribution, they could act as nuclei during the solidification process. Studies [23,24] show that particles finer than 0.6 m facilitate the nucleation of ferrite, while even more effective nucleation occurs in the 0.2∼0.6 m range. Figure 5 shows the SEM images of the welded metals with different amounts of REE added.…”

Section: Chemical Composition Analysismentioning

confidence: 99%

Effect of Rare-Earth Elements on the Corrosion Resistance of Flux-Cored Arc-Welded Metal with 10CrNi3MoV Steel

Wang

Jiang

et al. 2018

International Journal of Corrosion

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We modified the content of rare-earth elements (REE) in the flux-cored wire used to produce welds of high-strength low-alloy (HSLA) steel. The effect of REE addition on the microstructure as well as on the mechanical and electrochemical properties of the welded metal (WM) was investigated. REE-modified welded metals show very different responses during electrochemical impedance spectroscopy and the potentiodynamic polarization tests. The results indicate that the addition of REE of 0.3 wt.% facilitates a more uniform microstructure and improves both mechanical properties and corrosion resistance in welded metals.

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The formation and evolution of oxide particles in oxide-dispersion-strengthened ferritic steels during processing

Cited by 145 publications

References 51 publications

Development of a Novel Melt Spinning-Based Processing Route for Oxide Dispersion-Strengthened Steels

Development of a Novel Melt Spinning-Based Processing Route for Oxide Dispersion-Strengthened Steels

The Effect of Annealing to the Hardness of High Y2O3-Oxide Dispersion Strengthened (ODS) Ferritic Steels

Effect of Rare-Earth Elements on the Corrosion Resistance of Flux-Cored Arc-Welded Metal with 10CrNi3MoV Steel

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