Oxidation mechanisms of low energy-high flux nitrided ODS FeAl intermetallic alloy

Pedraza, F.; Grosseau-Poussard, Jean-Luc; Dinhut, J.F.

doi:10.1179/mht.2005.032

Cited by 2 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 Therefore, the strengthening imparted by the oxide dispersions is retained up to very high temperatures because only limited coarsening or dissolution of the particles occurs. 2,3 In addition, the presence of the fine dispersions combined with a very coarse-grained microstructure that is stable over long exposure times leads to excellent creep resistance up to higher temperatures than those that can be achieved with conventional wrought or cast alloys. 4,5 The ODS alloys commercially produced at the end of the 20 th century and the beginning of the 21 st century are represented by MA 956 or MA 957 6 , PM 2000 or PM 2010 6 , ODM alloys 7 and 1DK or 1DS 8 with a ferritic matrix by ODS Eurofer steels with a tempered ferriticmartensitic matrix 9 and by austenitic Ni-ODS PM 1000 or Ni-ODS PM 3030.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of new ODS alloys under single and multiple deformation

Mašek¹,

Khalaj²,

Nový³

et al. 2016

Mater. Tehnol.

View full text Add to dashboard Cite

The application of innovative processing techniques to conventional raw materials can lead to new structural materials with specific mechanical and physical properties, which open up new possibilities of use in some areas of industry. The processing is enabled by powder metallurgy, which utilizes powders consisting of a metal matrix with dispersed stable particles achieved by mechanical alloying and their hot consolidation by rolling. New oxide dispersion strengthened (ODS) Fe-Al-based alloys are tested under different single and multiple thermomechanical treatments at different temperatures. The results show that new ODS alloys are significantly affected by the thermo-mechanical treatment, leading to microstructural changes. Their analysis is performed using different analytical methods such as optical microscopy, scanning electron microscopy and X-ray diffraction analysis. Keywords: ODS alloys, composite, steel, Fe-Al Uporaba inovativnih tehnik preoblikovanja na obi~ajnih materialih lahko privede do novih konstrukcijskih materialov s specifi~nimi mehanskimi in fizikalnimi lastnostmi, ki odpirajo nove mo`nosti uporabe v industriji. Metalurgija prahov omogo~a uporabo prahov s kovinsko osnovo z dispergiranimi stabilnimi delci, ki jih dobimo pri mehanskem legiranju in vro~i konsolidaciji z valjanjem. Nove zlitine Fe-Al, disperzijsko utrjene z oksidi (ODS), so bile preizku{ene pri razli~ni, eno-ali ve~stopenjski obdelavi pri razli~nih temperaturah. Rezultati ka`ejo, da ima termomehanska obdelava novih ODS zlitin mo~an vpliv, ki se vidi v spremembah mikrostrukture. Analiza je bila izvedena s pomo~jo razli~nih analitskih metod, kot so: svetlobna mikroskopija, vrsti~na elektronska mikroskopija in rentgenska difrakcijska analiza.

show abstract

Section: Introductionmentioning

confidence: 99%

Behaviour of new ODS alloys under single and multiple deformation

Mašek¹,

Khalaj²,

Nový³

et al. 2016

Mater. Tehnol.

View full text Add to dashboard Cite

show abstract

“…Tests in group A were carried out to investigate the thermomechanical behaviour of different materials (1)(2)(3)(4)(5)(6)(7)(8) at different temperatures, looking at a single tensile and compression loading with a constant strain rate of 1 s -1 (Figure 7). In order to give a clearer comparison of the results, only the results at room temperature (RT), (800, 1000 and 1200)°C are presented.…”

Section: Testing Programmementioning

confidence: 99%

“…Its aim was to produce high-temperatureresistant materials for gas-turbine applications. 3 Currently, mechanical alloying is still considered to be the most effective process for obtaining fine and homogeneously distributed particles. The volume fraction of dispersed spherical oxides (usually Y 2 O 3 ) is typically below 1 % and the oxides typically have a mean size of 5-30 nm.…”

Section: Introductionmentioning

confidence: 99%

Influence of thermomechanical treatment on the grain-growth behaviour of new Fe-Al based alloys with fine Al2O3 precipitates

Mašek¹,

Khalaj²,

Jirková³

et al. 2017

Mater. Tehnol.

View full text Add to dashboard Cite

To obtain the superior-high-temperature creep strength, a transformation of a fine-grained structure to large grains due to abnormal grain growth or recrystallization is an important process in oxide-dispersion-strengthened (ODS) alloys. The processing of steel is enabled with powder metallurgy, which utilizes powders consisting of a Fe-Al metal matrix with a large O content, prepared with mechanical alloying, and their hot consolidation due to rolling. The thermomechanical characteristics of new ODS alloys with a Fe-Al matrix are investigated in terms of the changes in the grain-size distribution. The recrystallization and grain growth were quantified after heating up to 1200°C, which is the typical consolidation temperature for standard nanostructured ferritic steels. The results show that new ODS alloys are significantly affected by the thermomechanical treatment leading to microstructural changes. Recrystallization is mostly affected by decreasing the deformation and increasing the holding time, which leads to a growth of the grain size. Keywords: grain growth, ODS alloys, steel, Fe-Al, Al2O3Da bi pridobili najvi{jo temperaturo mo~i lezenja, je transformacija drobnozrnate strukture v ve~ja zrna ali celo v abnormalno velika oziroma rekristalizacija pomemben proces pri zlitinah, oja~anih z oksidno disperzijo (angl. ODS). Obdelava jekla je omogo~ena z metalurgijo v prahu, ki pomaga prahom, ki vsebujejo metalno matrico Fe-Al z veliko vsebnostjo kisika, pripravljeno z mehanskim legiranjem in njihovo vro~o konsolidacijo pri valjanju. Termomehanske karakteristike novih ODS-zlitin s Fe-Al matrico so bile preiskovane, ker je pri{lo do sprememb v velikosti porazdelitve zrn. Rekristalizacija in rast zrn sta bili ovrednoteni po segretju do 1200°C, ki je tipi~na temperatura konsolidacije za nanostrukturirana feritna jekla. Rezultati ka`ejo, da na ODS-zlitine zelo vpliva termomehanska obdelava, ki pripelje do sprememb v mikrostrukturi. Na rekristalizacijo najve~krat vpliva deformacija in pove~anje~asa zadr`anosti, ki povzro~i rast velikost zrn.

show abstract

Oxidation mechanisms of low energy-high flux nitrided ODS FeAl intermetallic alloy

Cited by 2 publications

References 17 publications

Behaviour of new ODS alloys under single and multiple deformation

Behaviour of new ODS alloys under single and multiple deformation

Influence of thermomechanical treatment on the grain-growth behaviour of new Fe-Al based alloys with fine Al2O3 precipitates

Contact Info

Product

Resources

About