Creep of Fe–18Al–4Cr alloy with zirconium addition

Dobeš, F.; Pešička, Josef; Kratochvı́l, Petr

doi:10.1016/j.intermet.2009.12.024

Cited by 6 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Selected area diffraction analysis on [100], [110] and [111] zone axis orientations (not presented here) shows that they have a face centred cubic structure and a cube to cube orientation relationship with the matrix. The same particles have already been observed in Fe 3 Al based alloys with Zr and C content,12,13 and in an Fe–Al alloy with the disordered ferrite (A2) structure 14. The only known cubic Zr carbide is the face centred cubic type phase ZrC with the lattice parameter a = 0·469 nm 15.…”

Section: Resultssupporting

confidence: 71%

“…The same particles have already been observed in Fe 3 Al based alloys with Zr and C content, 12,13 and in an Fe-Al alloy with the disordered ferrite (A2) structure. 14 The only known cubic Zr carbide is the face centred cubic type phase ZrC with the lattice parameter a50?469 nm. 15 However, this cannot be lattice matched with either the cubic D0 3 and B2 structures of Fe 3 Al alloys with lattice parameter a(D0 3 )50?579 nm or the Fe-Al alloys investigated in the present study with lattice parameter a(B2)50?289 nm.…”

Section: Microstructurementioning

confidence: 99%

See 1 more Smart Citation

Microstructure and mechanical properties of hot rolled Fe–40 at-%Al intermetallic alloys with Zr and B addition

Haušild

Karlı́k

Šı́ma

et al. 2011

Materials Science and Technology

View full text Add to dashboard Cite

The microstructure and mechanical properties of hot rolled Fe–40 at-%Al based intermetallic alloys, with 0·1 at-%Zr and different additions of B (varying from 0·01 to 0·1 at-%), are characterised. The additions of Zr and B improve tensile properties at room and elevated temperatures. Increasing B content is also associated with a number of other effects. First, the fracture mode changes from intergranular decohesion to cleavage, which correlates with significant increases in the fracture toughness. Second, there is a certain stabilisation of dislocations arranged in parallel systems of slip bands, as shown by transmission electron microscopy. Numerous complex stacking faults on {100} planes are also observed in the alloy with the highest B content. Third, B is found to modify the formation of second phase particles; such particles (coarse and fine) are analysed by energy dispersive X-ray spectroscopy and electron energy loss spectrometry to obtain compositional information.

show abstract

Section: Resultssupporting

confidence: 71%

Section: Microstructurementioning

confidence: 99%

Microstructure and mechanical properties of hot rolled Fe–40 at-%Al intermetallic alloys with Zr and B addition

Haušild

Karlı́k

Šı́ma

et al. 2011

Materials Science and Technology

View full text Add to dashboard Cite

show abstract

“…%) 17.30 Al, 3.81 Cr, 0.29 Zr and 0.13 C. The alloy was prepared by melting in a vacuum furnace, cast under argon and hot rolled at 1200 C. Samples were annealed at 1150 C for 2 h and air cooled. To stabilize the properties at elevated temperatures, the alloy was additionally annealed at 800 C for 24 h. The results of creep tests can be found in another contribution [8]. (ii) Fe 3 Al-based alloy containing 31.5 Al, 3.5 Cr, 0.25 Zr and 0.19 C.…”

Section: Testing Materialsmentioning

confidence: 99%

Estimation of ductility of Fe–Al alloys by means of small punch test

Dobeš¹,

Milička²

2010

Intermetallics

Self Cite

View full text Add to dashboard Cite

“…Large primary γ phases pin the grain boundaries and thus stabilize the microstructure, while the finely dispersed secondary and tertiary γ phases are responsible for the high strength of the material. The precipitation occurs in three stages: nucleation, growth, and coarsening [27][28][29][30][31]. Since precipitation is a diffusion-controlled process, the nucleation and growth mechanisms are strongly dependent on the temperature evolving continuously during cooling.…”

Section: Introductionmentioning

confidence: 99%

Influence and Sensitivity of Temperature and Microstructure on the Fluctuation of Creep Properties in Ni-Base Superalloy

et al. 2020

View full text Add to dashboard Cite

In this work, the sensitivity zone of microstructure and temperature for precipitation-strengthened nickel-based superalloys, used for turbine applications in aero-engines, has been firstly established. Heat treatment experiments with different solution temperatures were carried out. The microstructure evolution and creep residual strain sensitivity, low cycle fatigue properties, and tensile properties are analyzed, and the essential reason for the fluctuation of the mechanical properties of nickel-based superalloys was revealed. The main results obtained are as follows: following subsolvus solution heat treatment with a temperature of 1020 °C, samples have a high primary γ′I phase content, which is beneficial to low creep residual strain. Above the supersolvus solution temperature of 1040 °C, the creep residual strain value and low cycle fatigue performance fluctuate significantly. The essential reason for the dramatic fluctuation of performance is the presence of γ′ phases in different sizes and quantities, especially following the solution heat treatment in the temperature-sensitive zone of the γ′I phase, which is likely to cause huge fluctuations in the microstructure of tertiary γ′III phases. A zone of particular sensitivity in terms of temperature and microstructure for the γ′I phase is proposed. The range of suitable solution temperatures are discussed. In order to maintain stable mechanical properties without large fluctuations, the influence of the sensitivity within this temperature and microstructure zone on the γ′ phase should be considered.

show abstract

Creep of Fe–18Al–4Cr alloy with zirconium addition

Cited by 6 publications

References 14 publications

Microstructure and mechanical properties of hot rolled Fe–40 at-%Al intermetallic alloys with Zr and B addition

Microstructure and mechanical properties of hot rolled Fe–40 at-%Al intermetallic alloys with Zr and B addition

Estimation of ductility of Fe–Al alloys by means of small punch test

Influence and Sensitivity of Temperature and Microstructure on the Fluctuation of Creep Properties in Ni-Base Superalloy

Contact Info

Product

Resources

About