Titanium Based Intermetallics

Lütjering, G.; Williams, James C.

doi:10.1007/978-3-540-71398-2_8

Cited by 313 publications

(625 citation statements)

References 18 publications

Supporting

Mentioning

593

Contrasting

Unclassified

Order By: Relevance

“…The microstructure consisted of coarse, high aspect ratio primary a laths, and fine secondary a laths residing within a retained b matrix. Fully lamellar microstructures are used to maximize fracture toughness, [5] with elevated strength provided by the fine secondary alpha phase.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…However, under certain environmental conditions, the adherent and protective TiO 2 scale is broken down, exposing the underlying metal to attack. [5] The unwelcome discovery of this problem in the 1960s led to extensive research, [6][7][8][9][10][11][12] which has continued to the present day. [13,14] In 1972, Blackburn et al (in Reference 15) found titanium to be susceptible to stress corrosion cracking (SCC) under a variety of aggressive media, including nitric acid, nitrogen tetroxide, and molten salts.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Dislocation Mechanism of Stress Corrosion Embrittlement in Ti-6Al-2Sn-4Zr-6Mo

Chapman

Vorontsov

Sankaran

et al. 2015

Metall Mater Trans A

View full text Add to dashboard Cite

An observation of the dislocation mechanisms operating below a naturally initiated hot-salt stress corrosion crack is presented, suggesting how hydrogen may contribute to embrittlement. The observations are consistent with the hydrogen-enhanced localized plasticity mechanism. Dislocation activity has been investigated through post-mortem examination of thin foils prepared by focused ion beam milling, lifted directly from the fracture surface. The results are in agreement with the existing studies, suggesting that hydrogen enhances dislocation motion. It is found that the presence of hydrogen in (solid) solution results in dislocation motion on slip systems that would not normally be expected to be active. A rationale is presented regarding the interplay of dislocation density and the hydrogen diffusion length.

show abstract

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Dislocation Mechanism of Stress Corrosion Embrittlement in Ti-6Al-2Sn-4Zr-6Mo

Chapman

Vorontsov

Sankaran

et al. 2015

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…Titanium alloys have seen widespread use in the aerospace and defence industries due to their high specific strength and good resistance to corrosion [1][2][3]. By far the most widely used of the titanium alloys is Ti-6Al-4V, owing to its excellent balance of strength, ductility and manufacturability [2].…”

Section: Introductionmentioning

confidence: 99%

“…b alloys, with Ti-6Al-4V being an example of a ''classic'' a ? b alloy [1][2][3]. On cooling from the b or a ?…”

Section: Introductionmentioning

confidence: 99%

“…Firstly, due to the fact that hcp single crystals are elastically transversely anisotropic, the elastic response can vary significantly depending on the orientation of a given crystal relative to the imposed loading conditions. For example, the Young's modulus (E) of a titanium single crystal varies between * 100-145 GPa depending on the declination angle of the c-axis relative to an applied uniaxial stress [1]. Secondly, unlike cubic systems, dilatational strains result in deviatoric stresses.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterising the Effects of Strain Rate, Crystallographic Texture and Direction of Loading on the Mechanical Behaviour of Ti-6Al-4V

Wielewski

Arthington

Siviour

et al. 2015

J. dynamic behavior mater.

View full text Add to dashboard Cite

A cross-rolled plate of the industrially important titanium alloy, Ti-6Al-4V, has been microstructurally and mechanically characterised using a range of different experimental techniques. The microstructure of the material has been studied using backscatter electron (BSE) microscopy and electron backscatter diffraction (EBSD), with the crystallographic orientation data from the EBSD used to reconstruct the orientation distribution function of the dominant a phase. The mechanical behaviour of the material has been investigated at quasi-static and high strain rates in the three orthogonal material orientations in both tension and compression. A novel in situ optical measurement technique has been used to measure the geometry of the specimens during both quasi-static and high strain rate mechanical testing, improving the accuracy of the mechanical testing results and providing unprecedented information about the evolving geometries of the specimens. The macroscopic stress-strain response and the evolution of specimen cross-sectional profiles have been qualitatively linked to the macroscopic crystallographic texture in the plate.

show abstract

Integration of Deformation Processing with Additive Manufacture of Ti‐6A1‐4V Components for Improved β Grain Structure and Texture

Sidhu

Wescott

Prangnell

2015

TMS2015 Supplemental Proceedings

View full text Add to dashboard Cite

With Ti alloys like Ti-6Al-4V, the solidification conditions across virtually all AM platforms lead to strongly textured, coarse columnar, β grain structures. Transformation to α on cooling dilutes the texture, but significant texture is still inherited which contributes to undesirable anisotropy in AM parts. In the work presented a deformation step has been integrated into the manufacture of components produced by the blown powder method, using an Ultrasonic Impact Treatment (UIT), which has the additional benefit of reducing residual stresses. It has been found that the introduction of surface deformation to each layer can lead to a greatly refined grain structure with a more randomised texture. To investigate the origin of this effect, reconstruction of the β grain structure and texture from the α EBSD measurements has been used to characterise the high temperature β microstructure.

show abstract

Titanium Based Intermetallics

Cited by 313 publications

References 18 publications

The Dislocation Mechanism of Stress Corrosion Embrittlement in Ti-6Al-2Sn-4Zr-6Mo

The Dislocation Mechanism of Stress Corrosion Embrittlement in Ti-6Al-2Sn-4Zr-6Mo

Characterising the Effects of Strain Rate, Crystallographic Texture and Direction of Loading on the Mechanical Behaviour of Ti-6Al-4V

Integration of Deformation Processing with Additive Manufacture of Ti‐6A1‐4V Components for Improved β Grain Structure and Texture

Contact Info

Product

Resources

About