Controlling the properties of some ordered Ti-based alloys

Loretto, M. H.; Horspool, Dean; Botten, R; Hu, D.; Li, Y.G; Srivastava, D.; Sharman, R; Wu, Xinhua

doi:10.1016/s0921-5093(01)01492-7

Cited by 7 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dependence of the LROP of the ordered phase(s) on the chemical composition of HEAs has never been revealed so far. The Al-induced B2 ordering was earlier found in some β-Ti alloys [17][18][19][20][21][22][23][24][25]. It was demonstrated that both the bcc/B2 transformation and the degree of the order of the B2 phase in those alloys were depended on the Al content [17].…”

Section: Effect Of Zr On the Structure Of The Alnbtivzr X Alloysmentioning

confidence: 72%

“…In the case of AlNbTiVZr x alloys, it is impossible to define a stoichiometric composition of the B2 phase due to the simultaneous presence of a variety of constitutive elements. Therefore, based on a number of earlier studies [17][18][19][20][21][22][23][24][25] about the site occupations of alloying elements in ordered Ti alloys, the Ti sublattice (i.e. A sites) was assumed to be occupied with Ti, Nb and Zr, while Al and V enter into the Al sublattice (i.e.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structure and mechanical properties of B2 ordered refractory AlNbTiVZrx (x = 0–1.5) high-entropy alloys

Yurchenko

Stepanov

Zherebtsov

et al. 2017

Materials Science and Engineering: A

234

View full text Add to dashboard Cite

Structure and mechanical properties of the AlNbTiVZr x (x = 0; 0.1; 0.25; 0.5; 1; 1.5) refractory high-entropy alloys were investigated after arc melting and annealing at 1200°C for 24 h. The AlNbTiV alloy had a B2 ordered single phase structure. Alloying with Zr resulted in (i) change of the degree of order of the B2 phase; and (ii) precipitation of the Zr 5 Al 3 and C14 Laves ZrAlV phases. The density of the AlNbTiVZr x alloys varied from 5590 kg m −3 for the AlNbTiV alloy to 5870 kg m −3 for the AlNbTiVZr 1.5 alloy. The compression yield strength at 22°C increased with an increase in the Zr content from 1000 MPa for the AlNbTiV alloy to 1535 MPa for the AlNbTiVZr 1.5 alloy. The plasticity raised from 6% for the AlNbTiV alloy to > 50% for the AlNbTiVZr 0.5 alloy and then dropped to 0.4% for the AlNbTiVZr 1.5 alloy. At 600°C, the strongest alloy was also the AlNbTiVZr 1.5 , whereas, at 800°C, the AlNbTiVZr 0.1 alloy demonstrated the maximum strength. The plasticity of the AlNbTiV alloy at 600°C increased up to 14.3%, while the Zr-containing alloys had lower plasticity. At 800°C, all the AlNbTiVZr x alloys could be plastically deformed up to 50% of strain without fracture. Ordering in the alloys and the reasons of a complicated dependence of mechanical properties of the AlNbTiVZr x alloys on the Zr content and temperature were discussed.

show abstract

Section: Effect Of Zr On the Structure Of The Alnbtivzr X Alloysmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Structure and mechanical properties of B2 ordered refractory AlNbTiVZrx (x = 0–1.5) high-entropy alloys

Yurchenko

Stepanov

Zherebtsov

et al. 2017

Materials Science and Engineering: A

234

View full text Add to dashboard Cite

show abstract

“…The most promising materials from that group are based on two phases: g-TiAl (the predominant one) and a 2 -Ti 3 Al, preferably with fully lamellar microstructure [4].…”

Section: Introductionmentioning

confidence: 99%

Scale composition and oxidation mechanism of the Ti–46Al–8Nb alloy in air at 700 and 800 °C

Mitoraj

Godlewska²,

Heintz³

et al. 2011

Intermetallics

View full text Add to dashboard Cite

“…It should be noted that in this alloy, the presence of 0?2 wt-% carbon reduces the influence of oxygen on ductility, and this difference in O contents would not be expected to give rise to significant differences in properties. 6 Gas atomisation and PREP powders were both hot isostatically pressed at 900uC and 100 MPa for 4 h.…”

Section: Methodsmentioning

confidence: 99%

“…The oxygen content was ∼770 ppm in the gas atomised powder and was ∼1500 ppm in the PREP powder, the higher oxygen content originating from the ingot. It should be noted that in this alloy, the presence of 0·2 wt- carbon reduces the influence of oxygen on ductility, and this difference in O contents would not be expected to give rise to significant differences in properties 6. Gas atomisation and PREP powders were both hot isostatically pressed at 900°C and 100 MPa for 4 h. Analyses of as hot isostatically pressed powders, obtained using EDX, are shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Microstructure and properties of hot isostatically pressed powder and extruded Ti25V15Cr2Al0·2C

Jiang

Zhang

García-Pastor

et al. 2011

Materials Science and Technology

Self Cite

View full text Add to dashboard Cite

The influence of process route on the microstructure and tensile behaviour of specimens prepared from hot isostatically pressed powders and extruded ingot of the burn resistant alloy, Ti-25V-15Cr-2Al-0?2C (wt-%), has been investigated. Samples based on gas atomised (GA) and plasma rotating electrode process (PREP) powders have been studied. Microstructural examination shows that many PREP powder particles are single crystals, whereas GA particles are polycrystalline. The mechanical properties of hot isostatically pressed specimens have been assessed using tensile testing monitored by acoustic emission, while microstructures have been characterised by synchrotron X-ray microtomography and optical and analytical scanning electron microscopy. Tomographic examination revealed a small fraction (,0?002 vol.-%) of pores in samples made from hot isostatically pressed GA powders, but no porosity was detected in samples made from hot isostatically pressed PREP powder. In view of their similar tensile behaviour, it is concluded therefore that the porosity does not contribute to the scatter and poor ductility in these hot isostatically pressed samples. These pores increased in size and volume fraction after heat treatment above the hot isostatic press temperature. The large scatter in tensile properties of both hot isostatically pressed GA and PREP samples was correlated with the presence of large (100-400 mm) circular crack initiation sites on the fracture surfaces, but the origin of these initiation sites has not been identified.

show abstract

Controlling the properties of some ordered Ti-based alloys

Cited by 7 publications

References 12 publications

Structure and mechanical properties of B2 ordered refractory AlNbTiVZrx (x = 0–1.5) high-entropy alloys

Structure and mechanical properties of B2 ordered refractory AlNbTiVZrx (x = 0–1.5) high-entropy alloys

Scale composition and oxidation mechanism of the Ti–46Al–8Nb alloy in air at 700 and 800 °C

Microstructure and properties of hot isostatically pressed powder and extruded Ti25V15Cr2Al0·2C

Contact Info

Product

Resources

About