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Gelius, U.; Kolpachev, A. B.; Kolpacheva, O. V.; Nikiforov, I. Ya.; Chularis, A. A.

doi:10.1023/a:1013185624613

Cited by 11 publications

(5 citation statements)

References 2 publications

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“…It suggests the limitation of this simple charge transfer model. It may also be mentioned that Gelius et al [9] had observed that charge transfer was insignificant (upto 5% of the electron charge value) in TiCu. The present charge transfer is some what larger than this value.…”

Section: Resultsmentioning

confidence: 94%

“…Zhang and Guo [8] have performed firstprinciples calculations to determine the electronic structure and B2 phase stability of Ti-transition-metal alloys including TiCu using linear muffin-tin orbital method. Gelius et al [9] and Chularis et al [10] have reported the electronic energy structure of the valence band in tetragonal TiCu alloys using XPS and cluster version of multiple scattering theory in a self-consistent field approximation. They found that the major contribution in XPS is due to Cu d-states.…”

Section: Introductionmentioning

confidence: 99%

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Electron momentum density distribution in TiCu

Sharma

Mishra

et al. 2011

Intermetallics

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Electron momentum density distribution in TiCu

Sharma

Mishra

et al. 2011

Intermetallics

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“…According to the Ti-Cu phase diagram 19 and many reports 10,[41][42][43] , the final equilibrium microstructure of the Ti-Cu alloy with lower Cu content consists of α-Ti and Ti 2 Cu, which is formed by a eutectoid reaction. The body centered-tetragonal (bct) Ti 2 Cu phase (MoSi 2 type, a = 0.2943 nm and c = 1.0786 nm) should be present in almost all the Cu-bearing titanium alloys 44 . Yao et al 22 reported that the spherical Ti 2 Cu precipitates were observed to nucleate at grain boundaries and intra-grains.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

Effect of Heat Treatment Conditions on the Mechanical Properties and Machinability of Ti15SnxCu Alloys

Tsao

2020

Mat. Res.

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In the current work, the microstructure, mechanical properties and machinability of Ti15SnxCu alloys (x = 0 to 2 wt. %) were investigated. The alloy was prepared by the vacuum arc remelting and casting route and then thermally processed by solutionizing at 1000 °C for 2 hours, followed by water quenching. By controlling the heat-treated condition and Cu content, the highest bending strength and modulus were obtained from three-point bending testing. The increases were mainly caused by the strengthening effects of the formation of crystallites with fine grain size and nano-Ti 2 Cu precipitate phase. In addition, nano-Ti 2 Cu precipitation was caused by crack initiation and propagation, which reduced the ductility and improved the machinability of Ti15Sn2Cu alloy.

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“…Due to the remarkable shape memory effect (SME) and pseudoelasticity (PE), the TiNi-based shape memory alloys (SMAs) have attracted great researchersc attention [ 1 ]. Now two techniques exist to improve the mechanical performance of NiTi alloys: the first one is the thermomechanical manufacture, namely, the optimization of its microstructure; the second is the alloying process, namely, the changes in its components and phase structure.…”

Section: Introductionmentioning

confidence: 99%

MICROMECHANISM OF Cu AND Fe ALLOYING PROCESS ON THE MARTENSITIC PHASE TRANSFORMATION OF NiTi-BASED ALLOYS: FIRST-PRINCIPLES CALCULATION

2015

JSC

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Using first-principles pseudo-potential plane wave method, the formation enthalpy 'H, binding energy 'E, elastic constants, and electronic structure were calculated and analyzed carefully for NiTiX (X = Cu, Fe) shape memory alloy. The results show that the Cu or Fe element prefers to occupy the Ni site in the NiTi matrix phase respectively. Compared with the NiTi matrix phase, the 'H, 'E, c 44 and cc of NiTi (Cu) are similar to each other. However, the structural stability of the NiTi phase is improved obviously by the Fe alloying process. Simultaneously, the shear modulus c 44 and cc of NiTi (Fe) are larger than those of the NiTi matrix phase. Furthermore, Milliken population results indicate that Q Cu-Ti is smaller than Q Ni-Ti after the Cu alloying process, but Q Fe-Ti is larger than Q Ni-Ti. The electron density difference shows that some covalent bonding exists between Fe and Ti elements. Based on the upward analysis, the difference in the phase stability and elastic constants of NiTiX (X = Cu, Fe) is the substantial mechanism for the different M s of NiTiX (X = Cu, Fe) although Cu or Fe substitutes for the same atom Ni elements in the NiTi matrix phase.

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Untitled

Cited by 11 publications

References 2 publications

Electron momentum density distribution in TiCu

Electron momentum density distribution in TiCu

Effect of Heat Treatment Conditions on the Mechanical Properties and Machinability of Ti15SnxCu Alloys

MICROMECHANISM OF Cu AND Fe ALLOYING PROCESS ON THE MARTENSITIC PHASE TRANSFORMATION OF NiTi-BASED ALLOYS: FIRST-PRINCIPLES CALCULATION

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