Microstructure development in mechanically alloyed yttria dispersed austenitic steels

Phaniraj, M. P.; Kim, Dong Ik; Shim, Jaesool; Cho, Young Whan

doi:10.1016/j.actamat.2008.12.026

Cited by 72 publications

(18 citation statements)

References 26 publications

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“…x-ray diffraction analysis shows that the crystalline size and micro strain after milling lie in the range of 9 nm -11 nm and 0.3 per cent -0.5 per cent, respectively 1,2 . The parameters used for the synthesis of austenitic ODS steels are given in Table 1.…”

Section: Review Articlementioning

confidence: 99%

“…The MA parameters lie in the range of BPR 5:1 to 10:1, speed 300 RPM -600 RPM, and MA of these alloys is usually carried out up to 100 hours depending on the milling conditions. The reported consolidation parameters are 50 MPa to 100 MPa pressure with sintering temperature in range of 900 °C -1100 °C and holding time of about 5 min -15 min [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] …”

Section: Processing Techniques Of Austenitic Ods Alloysmentioning

confidence: 99%

“…During milling, yttria dissolves into austenitic phase and further processing (consolidation or heat treatment) of powders leads to formation of nano clusters. Dissolved yttria combines with oxygen and titanium to form complex nano clusters (Y-Ti-O) 1,2,5,7 . Effect of nitrogen dissolution into austenitic ODS steels has also been reported with varying milling time.…”

Section: Review Articlementioning

confidence: 99%

“…There are different techniques used to characterise the clusters such as Z contrast mode, high angle annual dark field (HAADF), electron energy loss spectroscopy (EELS) and energy dispersive spectroscopy (EDS) 4,11 attachments in transmission electron microscope (TEM) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] , synchrotron x-Ray diffraction and atom probe tomography (APT) 4,11,15 . The APT, EELS, and EDS are used to analysis the chemical composition of the dispersoids.…”

Section: Microscopy Of Austenitic Odsmentioning

confidence: 99%

“…Ni based super alloys and austenitic steels were considered to be excellent choice of material due to their closely packed structure. Ni base alloys are highly expensive compared to austenitic steels and hence act as a potential materials for the above applications [1][2] . Ferritic and martensitic grades of stainless steel have been used widely in nuclear applications due to their excellent void swelling resistance, but their creep resistance is poor due to their open BCC structure.…”

Section: Introductionmentioning

confidence: 99%

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Austenitic Oxide Dispersion Strengthened Steels : A Review

2016

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Materials play an important role in the fast breeder reactors. Materials used in cladding tube and fuel pins should have better creep and void swelling resistance. To overcome these difficulties, a new class of material known as oxide dispersion strengthened (ODS) steels are used. There are two groups of ODS steels, the ferritic and the austenitic ODS steels based on the matrix. The present paper reviews the current status of research in austenitic ODS steels. The interaction of dislocations with finely dispersed incoherent, hard particles that governs the strength and high temperature properties of ODS materials is briefly reviewed. The synthesis route adopted for these ODS steels, which is mostly through powder metallurgy route is also discussed. The role of various oxides such as Y2O3, ZrO2and TiO2and the clusters formed in these ODS steels on the mechanical properties and void swelling characteristics is also discussed.

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Section: Review Articlementioning

confidence: 99%

Section: Processing Techniques Of Austenitic Ods Alloysmentioning

confidence: 99%

Section: Review Articlementioning

confidence: 99%

Section: Microscopy Of Austenitic Odsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Austenitic Oxide Dispersion Strengthened Steels : A Review

2016

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Metal‐Matrix Materials for High‐Temperature Applications with Liquid Aluminum

et al. 2019

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Herein, powder metallurgically processed transformation‐induced plasticity effect (TRIP)‐steel‐matrix composites with additions of TiO2 or Al2O3–TiO2 are investigated for their potentional use as a impact pad in aluminum melting furnaces. The composites contain volume fractions of 10% or 30% ceramic particles dispersed in a CrMnNi‐steel matrix. The formation of ceramic precipitates in the steel and the interactions between the matrix and the ceramic particles during sintering influence the microstructure of the fired materials. TiO2 promotes the formation of Mn–Ti–O spinel‐type structures whereas the Al2O3–TiO2 material induces the additional formation of Ti–Mn–Al–O solid solutions but reduces the densification progress. Despite material changes, the steel matrix undergoes α'‐martensite formation during quasi‐static tensile loading at room temperature in the reference material and in the composite variants. The yield strength in the composite variant with 10 vol% TiO2 increases by 28% (constant with 10 vol% Al2O3–TiO2), whereby the ultimate tensile strength and the fracture strain are lower for all composite variants as compared to the pure steel. The yield strength of the materials after immersion test in liquid aluminum at 800 °C is +80% (10% TiO2) or +29% (10% Al2O3–TiO2) as compared to the corroded steel material.

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