The Fe–Ni–Al phase diagram in the Al-rich (&gt;50at.% Al) corner

Chumak, Ihor; Richter, Klaus W.; Ipser, Herbert

doi:10.1016/j.intermet.2007.04.012

Cited by 58 publications

(21 citation statements)

References 15 publications

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“…Recent reviews for the subsystems of the Ti-Fe-Ni-Al quaternary provide such information. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] However, on the extension from the ternary systems to the quaternary system, there are only few investigations available in literature. [16][17][18][19][20][21][22][23][24] Past efforts associated with the quaternary system include: (i) the relation between structure and magnetic properties of a magnetically semipermanent alloy with specific compositions Fe-(10-25)Ni- (3)(4)(5)Al-1Ti (wt.%), [16] Fe-18Ni-3.8 Al-1Ti (wt.%), [17] Fe-13.8Ni-7.0Al-1.7Ti (at.%), [18] and Fe-16.2Ni-3.1Al-1.13Ti (wt.%), [19] (ii) alloying effects on superplastic behavior for Ti-based alloys Ti-5Fe-xAl-yNi (x = 4-8, y = 0, 1, or 2) (wt.%), [22] (iii) phase relation between CsCl-type and Heusler phases within the NiAlTiNi-TiFe-FeAl section, [21] (iv) Partitioning behavior of alloying elements among the phases of c¢, g, b 1 , b 2 , and H in the Ni-Al-Ti base systems, [23] and (v) the effect of Ti additions on the microstructure of Ni-Al-Fe alloys.…”

Section: Introductionmentioning

confidence: 99%

On the Quaternary System Ti-Fe-Ni-Al

Yan

Grytsiv

Rogl

et al. 2008

J Phs Eqil and Diff

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The homogeneity ranges of the Laves phases and phase relations concerning the Laves phases in the quaternary system Ti-Fe-Ni-Al at 900°C were defined by x-ray powder diffraction (XPD) data and electron probe microanalysis (EPMA). Although at higher temperatures the Laves phase forms a continuous solid solution, two separate homogeneity fields of TiFe 2 -based (denoted by k Fe ) and Ti(TiNiAl) 2 -based (denoted by k Ni ) Laves phases appear at 900°C. The relative locations of Laves phases, G phase, Heusler phase, and CsCl-type phase as well as the associated tie-tetrahedra were experimentally established in the quaternary for 900°C and presented in three-dimensional (3D) view. Furthermore, a partial isothermal section TiFe 2 -TiAl 2 -TiNi 2 was constructed, and a connectivity scheme, derived for equilibria involving Laves phases in the Ti-Fe-Ni-Al quaternary system at 900°C was derived. As a characteristic feature of the quaternary phase diagram, the solid solubility of fourth elements in both the TiFe 2 -based and Ti(NiAl) 2 -based Laves phases is limited at 900°C and is dependent on the ternary Laves phase composition. A maximum solubility of about 8 at.% Ni is reached for composition Ti 33.3 Fe 33.3 Al 33.4 . Structural details have been evaluated from powder x-ray and neutron diffraction data for (i) the Ti-Fe-Ni ternary and the Ti-Fe-Ni-Al quaternary Laves phases (MgZn 2 -type, space group: P6 3 /mmc) and (ii) the quaternary G phase. Atom site occupation behavior for all phases from the quaternary system corresponds to that of the ternary systems. For the quaternary Laves phase, Ti occupies the 4f site and additional Ti (for compositions higher than 33.3 at.%Ti) preferably enters the 6h site. Aluminum and (Fe,Ni) share the 6h and the 2a sites. The compositional dependence of unit cell dimensions, atomic coordinates, and interatomic distances for the Laves phases from the quaternary system is discussed. For the quaternary cubic G phase, a centrosymmetric as well as a noncentrosymmetric variety was observed depending on the composition: from combined x-ray and neutron powder diffraction measurements Ti 33.33 Fe 13.33 Ni 10.67 Al 42.67 was found to adopt the lower symmetry with space groupF " 43m.

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Section: Introductionmentioning

confidence: 99%

On the Quaternary System Ti-Fe-Ni-Al

Yan

Grytsiv

Rogl

et al. 2008

J Phs Eqil and Diff

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“…This can be explained by the fact that the calculation of both the modulus and hardness depends on the contact areas through Eqs. (2) and (3). Therefore, accurate measurements of the contact area are critical to the measurement of the hardness and the modulus.…”

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confidence: 99%

Mechanical properties of intermetallic phases in multi-component Al–Si alloys using nanoindentation

2009

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“…This structure type can be derived from a distorted closed-packed arrangement of metal atoms (Wells, 1975). The lattice parameters of Al 10 Ni 3 Fe 0.83 (Table 1) are similar to those of Al 10 Fe 3 Ni (Chumak et al, 2007). The asymmetric unit of Al 10 Ni 3 Fe 0.83 comprises of five sites, three fully occupied by Al atoms at Wyckoff sites 2a (Al3), 6h (Al5) and 12k (Al4), one fully occupied by Ni atoms (6h; Ni1) and one partially occupied (occupancy 0.83) by Fe atoms (2c; Fe1).…”

Section: Structure Descriptionmentioning

confidence: 55%

“…The occurrence of a phase with composition Al 10 Ni 3 Fe has been reported by Khaidar et al (1982) but it was never observed by other teams afterwards, although the existence of a decagonal phase with composition close to this phase was in argument (Zhang et al, 2008). On the other hand, its Fe-rich counterpart Al 10 Fe 3 Ni was frequently observed, and its crystal structure has also been determined (Chumak et al, 2007).…”

Section: Structure Descriptionmentioning

confidence: 91%