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

2010-05-01
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.

Suggestions

The structural and electronic properties of BN and BP compounds and BNxP1-x alloys
Mohammad, Rezek; Katırcıoğlu, Şenay (Elsevier BV, 2009-06-10)
The structural and electronic properties of BN and BP compounds and BNxP1-x alloys have been investigated by full potential linearized augmented plane wave (FP-LAPW) method based on density functional theory (DFT). The total energies and electronic band structures of these compounds have been calculated for different approximations of exchange-correlation energy. The comparative study has showed that the Perdew-Wang-generalized gradient approximation (PW-GGA) is the best one to produce the measured structur...
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...
Effects of synthesis, doping methods and metal content on thermoluminescence glow curves of lithium tetraborate
Kayhan, Mehmet; Yılmaz, Ayşen (Elsevier BV, 2011-07-28)
Lithium tetraborate: Li(2)B(4)O(7), (LTB) has been synthesized and doped with various Mn content by different methods, such as, high temperature solid state synthesis and solution assisted synthesis methods. Powder XRD results proved the formation of solid-solution by replacing Mn with Li ions in LTB lattice at lower amount of Mn doping, for example 0.1-3.0% Mn doping. In this research TL glow curves of Mn doped lithium tetraborate (LTB: Mn) produced by using different synthesis and doping methods and the e...
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) ...
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...
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.