Effect of vanadium on atomic ordering characteristics and anti-phase boundary energies of B2-FeCo alloys

Effect of V on the energetical and structural characteristics of atomic ordering processes of B2-FeCo intermetallics have been investigated via electronic theory of multi-component alloys combined with Monte Carlo (MC) simulations. Emphasis has been placed on the variation of anti-phase boundary (APB) energies with V content and temperature to establish a relationship between ductility and atomic ordering characteristics of (FeCo)(100-x)V(x) (x = 0-5 at%) alloys. It was shown that APB energies are highly affected by actual degree of long range order (LRO) and also dissolution mode of V alloying element atoms. Results of present simulation reveals that partially ordered (FeCo)(100-x)V(x) alloy having x = 2 at% V facilitates the highest loss in {110} APB energy in temperature range of 300-750 K and yields drastic increase in < 111 > {112} APB energies with increasing concentration of V due to pinning effect. Owing to the lowest APB energy of {110} planes, (FeCo)(98)V(2) alloy would be predicted to display higher ductility, in agreement with experimental observations, relative to binary B2-FeCo intermetallic due to more independent movement of a/2 < 111 > partials at low temperatures.


Effect of (Mo, W) substitution for Nb on glass forming ability and magnetic properties of Fe-Co-based bulk amorphous alloys fabricated by centrifugal casting
Kucuk, Ilker; Aykol, Muratahan; Uzun, Orhan; Yıldırım, Mehmet; Kabaer, Mehmet; Duman, Nagehan; Yilmaz, Fikret; Erturk, Kadir; Akdeniz, Mahmut Vedat; Mehrabov, Amdulla (Elsevier BV, 2011-02-03)
In this study, effects of simultaneous Mo and W substitution for Nb additions on the stability and magnetic properties of Fe-Co-based bulk metallic glass (BMG) alloys fabricated by centrifugal casting are investigated. The saturation magnetization (J(s)) and coercivity (H(c)) for the as-cast Fe(36)CO(36)B(19.2)Si(4.8)X(4) (X = Nb or Mo(0.5)W(0.5)) BMG alloys and melt-spun Fe(36)Co(36)B(19.2)Si(4.8)Mo(2)W(2) were in the range of 1.02-1.57T and 11.13-1685 A/m, respectively. The Fe(36)Co(36)B(19.2)Si(4.8)X(4) ...
Effect of ternary alloying elements addition on atomic ordering characteristics of Fe-Al intermetallics
Mehrabov, Amdulla; Akdeniz, Mahmut Vedat (Elsevier BV, 1999-05-28)
The energetic and structural characteristics of atomic ordering processes in Fe-0.5(Al1-nXn)(0.5) intermetallics have been qualitatively analyzed based on the statistico-thermodynamical theory of ordering by means of a quasi-chemical method combined with electronic theory in the pseudopotential approximation. The effects of ternary impurities on order-disorder phase transformation temperature and the characteristics of atomic short-range order in Fe-Al type intermetallics have been calculated. Impurity elem...
The electronic band structures of InNxAs1-x, InNxSb1-x and InAsxSb1-x, alloys
Mohammad, Rezek; Katırcıoğlu, Şenay (Elsevier BV, 2009-02-05)
The band cap bowings of InNxAs1-x, InNxSb1-x, and InAsxSb1-x alloys defined by the optimized lattice constants are investigated using empirical tight binding (ETB) method. The present ETB energy parameters which take the nearest neighbor interactions into account with sp(3)d(2) basis are determined to be sufficient to provide a typical feature for the band gap bowings of the alloys. The band gap bowing parameter is found to be relatively large in both InNxAs1-x and InNxSb1-x compared to InAsxSb1-x alloys. M...
Effect of solidification rate on microstructure and primary carbides of AISI DC 53 cold work tool steel
Cardakh, Ismail Seckin; Kalkanlı, Ali (Springer Science and Business Media LLC, 2019-05-01)
The solidification behavior of AISI DC 53 cold work tool steel was investigated by means of a cooling curve and its first derivative. Copper and sand wedge-shaped molds were used to obtain various solidification rates. To reveal the cooling rate degree during solidification, the secondary dendrite arm spacing of the steel alloy was examined by scanning electron microscopy (SEM). The solidification rates of each section for both wedge steel samples were calculated by means of the secondary dendrite arm spaci...
Effect of Sm on thermal and mechanical properties of Cu-Zr-Al bulk metallic glasses
Sikan, Fatih; Atabay, S. E.; Motallebzadeh, A.; Özerinç, Sezer; Kalay, I.; Kalay, Yunus Eren (Elsevier BV, 2019-01-16)
The effect of rare-earth (Sm) microalloying on the thermal stability and phase selection along with the effect of nanocrystallization on the mechanical properties of amorphous melt-spun ribbons of Zr50Cu40Al10, Zr49Cu39.2Al9.8Sm2 and Zr48Cu38.4Al9.6Sm4 alloys were investigated using differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM), Vickers and nanoindentation hardness tests and micropillar compression analysis. XRD and TEM analyses showed that all samp...
Citation Formats
M. AYKOL, A. Mehrabov, and M. V. Akdeniz, “Effect of vanadium on atomic ordering characteristics and anti-phase boundary energies of B2-FeCo alloys,” INTERMETALLICS, pp. 893–899, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34992.