Interaction of dissolved atoms and relaxation due to interstitial atoms in hcp metals

Blanter, M. S.; Granovskiy, E.; Magalas, Leszek B.

doi:10.1016/j.msea.2003.08.078

Cited by 11 publications

(14 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak is the same as observed in the cp-Ti (Fig. 4), and thus, is due to the stress induced short-range reordering of oxygen complexes around the titanium atoms in hexagonal lattice [6,[42][43][44][45][46][47][48]. The activation energy and pre-exponential factor of the 460 K peak were H = 1.17 ± 0.02 eV and τ o = 3.82 ± 0.01 × 10 -14 s (Arrhenius plot), and H = 1.17 ± 0.02 eV and τ o = 4.00 ± 0.02 × 10 -14 s (Debye fitting).…”

Section: Resultsmentioning

confidence: 71%

“…It is tacitly assumed here, that the internal friction peaks might be estimated as single relaxation processes. Nonetheless, more detailed analysis should take into account the interaction between interstitial atoms [22][23][24][25][26][27][28][29][30]48], the anisotropy effect of Snoek peak [18][19][20][21], and grain size.…”

Section: Resultsmentioning

confidence: 99%

“…In ternary Ti-X-O solid solutions the interaction between the oxygen atoms and the substitutional atoms is stronger (varies for different substitutional atoms) than the oxygen-oxygen interaction, and, thus, significantly affects the short-range order of interstitial atoms, displacement of the host atom, and, thus, internal friction spectra in the hcp metals [48]. The 460 K peak may be attributed to the stress induced short-range ordering of oxygen atoms around the solute molybdenum atoms.…”

Section: Resultsmentioning

confidence: 99%

“…This phenomenon gives rise to the classic relaxation process, which manifests (in bcc lattice) as internal friction peak known as Snoek peak [6][7]13,[15][16][17]28]. However, the relaxation mechanism of point defects in the hcp metals [6,[42][43][44][45][46][47][48] differs from the classic Snoek relaxation observed in the bcc metals [6,15]. Stated another way, the Snoek relaxation is the stress induced redistribution of elastic dipoles whose symmetry is lower than that of the surroundings.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Internal Friction and Microstructure of Ti and Ti-Mo Alloys Containing Oxygen

Martins

Araújo

Nogueira

et al. 2016

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

Ti-Mo alloys are promising materials for use as biomaterials, because these alloys have excellent corrosion resistance and a good combination of mechanical properties such as fatigue, low elastic modulus, hardness, and wear resistance. The objective of this paper was to study the effect of heavy interstitial atoms on anelastic properties of Ti-Mo alloys using mechanical spectroscopy. The internal friction and Young's modulus were measured as a function of temperature using dynamic mechanical analyser. The internal friction spectra were brought about by relaxation processes attributed to shortrange stress induced reorientation of interstitial and substitutional complexes in solid solution. It is suggested that the nature of the relaxing entities can be worked out in further research on Ti-Mo single crystals.

show abstract

Section: Resultsmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Internal Friction and Microstructure of Ti and Ti-Mo Alloys Containing Oxygen

Martins

Araújo

Nogueira

et al. 2016

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

show abstract

“…The strain induced by the interstitials in the crystal lattice along the Z-axis, perpendicular to the basal plane, is greater than that along the X-and Y-axes lying in the basal plane. Lattice expansion due to foreign atoms in interstitial positions has been theoretically explained on the basis of the concept of elastic dipoles [11,12].…”

mentioning

confidence: 99%

Lattice expansion of Ti–6Al–4V by nitrogen and oxygen absorption

Montanari

Costanza

Tata

et al. 2008

Materials Characterization

View full text Add to dashboard Cite

The effects of nitrogen and oxygen absorption on lattice expansion of Ti-6Al-4V have been investigated by high-temperature X-ray diffractometry. Experiments have been performed on stress-free powder for its high surface-volume ratio and to avoid possible effects on diffraction patterns due to texture change and recovery of defective structures induced by the measurement cycle at temperature. Cell parameters a and c, measured at increasing temperatures up to 600°C, show linear trends with different slopes. As temperature increases, the cell volume expands and the c/a ratio changes. This is due to both lattice thermal expansion and absorption of oxygen and nitrogen. Part of the gas remains entrapped in the metal after cooling to room temperature causing a residual lattice distortion. Results have been compared with literature data obtained in analogous tests performed on bulk Ti-6Al-4V alloy both in vacuum and in inert gas atmosphere.

show abstract

Powder Metallurgy Production of Ti-2 Wt Pct Si Alloy: Structural, Mechanical, and Electrochemical Characterization of the Sintered Material

Guzmán

Muranda

Soliz

et al. 2020

Metall Mater Trans A

View full text Add to dashboard Cite

Several commercial alloys use silicon (Si) to improve titanium (Ti) resistance to creep and oxidation at high temperatures and to improve Ti corrosion resistance in acid media. According to the Ti-Si phase diagram, reported stable solid phases in the Ti-rich region are b-Ti, a-Ti, Ti 3 Si, and Ti 5 Si 3. Nevertheless, very few works in the literature discuss Ti 3 Si intermetallic production. As such, this work studied the possibility of obtaining an a-Ti-Ti 3 Si alloy by hot pressing a-Ti supersaturated solid solution powders obtained by mechanical alloying. The consolidation of milled powders was performed using uniaxial hot press equipment. Structural and morphological evolutions during the sintering process were investigated by X-ray diffraction and scanning electron microscopy. Electrochemical behaviors of sintered samples were evaluated by open circuit potential and linear sweep voltammetry. Results show a fine and uniform Ti 3 Si alloy distribution in the a-Ti matrix produced by the proposed powder metallurgy route. The sintered samples demonstrated high micro-hardness and resistance to sulfuric acid corrosion. Additionally, Ti 3 Si was shown to have a significant hardening effect on the a-Ti matrix. Electrochemical behavior further demonstrates that a fine and homogeneous Ti 3 Si distribution in the a-Ti matrix contributes to a more stable superficial oxide layer against sulfuric acid corrosion.

show abstract

Interaction of dissolved atoms and relaxation due to interstitial atoms in hcp metals

Cited by 11 publications

References 17 publications

Internal Friction and Microstructure of Ti and Ti-Mo Alloys Containing Oxygen

Internal Friction and Microstructure of Ti and Ti-Mo Alloys Containing Oxygen

Lattice expansion of Ti–6Al–4V by nitrogen and oxygen absorption

Powder Metallurgy Production of Ti-2 Wt Pct Si Alloy: Structural, Mechanical, and Electrochemical Characterization of the Sintered Material

Contact Info

Product

Resources

About