Effect of Ti addition on thermal stability and phase evolution of super-invar based yttria added ODS alloys developed by mechanical alloying and spark plasma sintering

Arora, Arpan; Mula, Suhrit

doi:10.1016/j.jallcom.2021.163336

Cited by 16 publications

(1 citation statement)

References 54 publications

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“…Typical reinforcement particles include SiC, TiC, Y 2 O 3 , and Al 2 O 3 [ 17 , 21 , 22 , 23 , 24 ] in matrix alloys such as Al, ferritic or austenitic steels, or Ni alloys [ 14 ]. In ODS with titanium-containing matrix alloys, a complex Y 2 Ti 2 O 7 oxide is formed [ 25 ]. Similarly, multiple groups have shown that the addition of elemental hafnium results in the formation of a Y 2 Hf 2 O 7 complex oxide accompanied with a decrease in oxide particle size from 50 nm to 10 nm [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy

Lopez,

Cerne,

et al. 2023

Materials

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Oxide-dispersion-strengthened (ODS) alloys have long been considered for high temperature turbine, spacecraft, and nuclear reactor components due to their high temperature strength and radiation resistance. Conventional synthesis approaches of ODS alloys involve ball milling of powders and consolidation. In this work, a process-synergistic approach is used to introduce oxide particles during laser powder bed fusion (LPBF). Chromium (III) oxide (Cr2O3) powders are blended with a cobalt-based alloy, Mar-M 509, and exposed to laser irradiation, resulting in reduction–oxidation reactions involving metal (Ta, Ti, Zr) ions from the metal matrix to form mixed oxides of increased thermodynamic stability. A microstructure analysis indicates the formation of nanoscale spherical mixed oxide particles as well as large agglomerates with internal cracks. Chemical analyses confirm the presence of Ta, Ti, and Zr in agglomerated oxides, but primarily Zr in the nanoscale oxides. Mechanical testing reveals that agglomerate particle cracking is detrimental to tensile ductility compared to the base alloy, suggesting the need for improved processing methods to break up oxide particle clusters and promote their uniform dispersion during laser exposure.

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Section: Introductionmentioning

confidence: 99%

In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy

Lopez,

Cerne,

et al. 2023

Materials

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Effects of Zr, Al, and Al+Zr Addition on Phase Evolution Characteristics and Strengthening Mechanisms of Fe‐42Ni‐2Y₂O₃ Oxide Dispersion Strengthening Steels Developed by Mechanical Alloying and Spark Plasma Sintering

Arora,

Mula

2024

Adv Eng Mater

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In the present study, Fe‐42wt.% Ni‐2wt.% Y2O3 super invar‐based steels have been explored to study the effects of Zr, Al and Zr+Al addition on phase evolution, strengthening mechanisms and mechanical behavior. Three different compositions such as Fe‐42Ni‐2Y2O3‐2Zr (2YZr), Fe‐42Ni‐2Y2O3‐2Al (2YAl), Fe‐42Ni‐2Y2O3‐2Zr‐2Al (2YAlZr) were developed by mechanical alloying (MA) followed by spark plasma sintering (SPS) at 1100 °C with an applied pressure of 60 MPa. The 2YZr alloy after SPS shows evolution of a uniform grain size ∽1.7 µm, whereas 2YAl revealed the formation of bimodal grain structure sintered under same condition. Conversely, the combined effect of Al and Zr addition resulted in the evolution of ultrafine grained structure (∽380 nm) after SPS at the same condition (i.e., at 1100 °C). The superior mechanical strength of the 2YAlZr alloy (5.3 GPa/1415 MPa) is attributed to the evolution of uniformly dispersed extremely fine (60 nm) high‐density Al‐ and Zr‐rich oxide complexes in the ultrafine grained matrix. Analysis of strengthening contributions to the yield strength found to correlate well with the experimental results and attributed to the morphology of microstructural constituents, its stability, and volume fraction of dispersoids in the matrix.This article is protected by copyright. All rights reserved.

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Microstructure Evolution and Mechanical Properties of a High Cr Oxide Dispersion-Strengthened Steel through STARS Route Followed by Hot Isostatic Pressing

Zhai,

Che,

et al. 2024

J. of Materi Eng and Perform

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Effect of Ti addition on thermal stability and phase evolution of super-invar based yttria added ODS alloys developed by mechanical alloying and spark plasma sintering

Cited by 16 publications

References 54 publications

In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy

In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy

Effects of Zr, Al, and Al+Zr Addition on Phase Evolution Characteristics and Strengthening Mechanisms of Fe‐42Ni‐2Y₂O₃ Oxide Dispersion Strengthening Steels Developed by Mechanical Alloying and Spark Plasma Sintering

Microstructure Evolution and Mechanical Properties of a High Cr Oxide Dispersion-Strengthened Steel through STARS Route Followed by Hot Isostatic Pressing

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Effect of Ti addition on thermal stability and phase evolution of super-invar based yttria added ODS alloys developed by mechanical alloying and spark plasma sintering

Cited by 16 publications

References 54 publications

In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy

In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy

Effects of Zr, Al, and Al+Zr Addition on Phase Evolution Characteristics and Strengthening Mechanisms of Fe‐42Ni‐2Y2O3 Oxide Dispersion Strengthening Steels Developed by Mechanical Alloying and Spark Plasma Sintering

Microstructure Evolution and Mechanical Properties of a High Cr Oxide Dispersion-Strengthened Steel through STARS Route Followed by Hot Isostatic Pressing

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Product

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Effects of Zr, Al, and Al+Zr Addition on Phase Evolution Characteristics and Strengthening Mechanisms of Fe‐42Ni‐2Y₂O₃ Oxide Dispersion Strengthening Steels Developed by Mechanical Alloying and Spark Plasma Sintering