The morphology and substructure of Ti-Cu martensite

Williams, James C.; Taggart, R.; Polonis, D.H.

doi:10.1007/bf02643444

Cited by 62 publications

(20 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While the morphology of these laths suggests the presence of martensitic microstructure in this sample, the resolution afforded by these SEM studies is not sufficient to unequivocally claim the presence of martensite. A bright-field TEM image from the same sample, shown in Figure 1(c), shows a microstructure that is similar to the acicular martensitic microstructure reported in quenched Ti-6 wt pct Cu alloy by Williams et al [8] This acicular martensite is characterized by the presence of parallel primary plates together with smaller secondary plates. [8] Figure 1(c) shows one such region where larger primary laths of one crystallographic variant are intersected by smaller secondary ones (different generation) of other variants.…”

supporting

confidence: 54%

“…[3] While pearlite is the result of synchronous, cooperative growth of a soluterich and a solute-lean phase side by side leading to an alternating lamellar morphology of phases; bainite forms by noncooperative growth of two phases resulting in a nonlamellar morphology. [4,5] Williams et al [8] reported that Ti-Cu alloys containing up to 5 wt pct Cu exhibit martensitic colonies when the alloy is quenched from the high-temperature single b phase field. In the case of alloys containing higher amounts of Cu (up to 8 wt pct), acicular martensite was reported to be present throughout the matrix.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Competing Martensitic, Bainitic, and Pearlitic Transformations in a Hypoeutectoid Ti-5Cu Alloy

Devaraj

Nag

Muddle

et al. 2011

Metall Mater Trans A

View full text Add to dashboard Cite

This article discusses the competing mechanisms of martensite formation vs eutectoid decomposition via pearlitic or bainitic mechanisms during continuous cooling of a Ti-5 wt pct Cu hypoeutectoid alloy, which falls under the category of active eutectoid systems. Faster cooling rates result in a mixed microstructure of nanoscale bainite consisting of a far-from-equilibrium Ti 2 Cu phase and martensitic alpha plates, as determined from three-dimensional atom probe (3DAP) coupled with energy-filtered transmission electron microscopy (EFTEM). Slower cooling resulted in near-equilibrium eutectoid-based microstructures.

show abstract

supporting

confidence: 54%

mentioning

confidence: 99%

Competing Martensitic, Bainitic, and Pearlitic Transformations in a Hypoeutectoid Ti-5Cu Alloy

Devaraj

Nag

Muddle

et al. 2011

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…It is found that the martensite structure was combined with basket--weave structure of acicular α-Ti (dark colour) and Ti 2 Cu (light colour). Williams et al [16] reported that martensite has a massive morphology in alloys containing 4% Cu or less, whereas alloys containing 6 and 8% Cu exhibit acicular martensite. The high cooling rate imposed on the samples promoted complete β-phase decomposition and formed acicular plates of martensite typically found in titanium alloys.…”

Section: Resultsmentioning

confidence: 99%

Basic Electrochemical Behavior of Ti-7Cu Alloys for Medical Applications

Tsao

2012

Acta Phys. Pol. A

View full text Add to dashboard Cite

The aim of this study was to investigate the e ects of two di erent treatments, as-cast setup and solution heat treatment, on the general electrochemical corrosion resistance of Ti 7Cu alloy samples immersed in a 0.9 wt% NaCl solution at 25 • C. The microstructure was examined by scanning electron microscopy and X-ray di ractometry. Corrosion behavior was tested by potentiodynamic polarization curves. Finer α ′ martensite and Ti2Cu intermetallic particles were provided by casting and heat treated processes, respectively. The results indicated that only corrosion potential is signi cantly more noble in the heat treated sample, but other characteristics are only slightly di erent.

show abstract

“…[26,27]. Two types of martensitic laths were observed; coarse primary laths were formed first, and then fine secondary laths were generated between the primary laths [28]. The latter occupies the most area in the solution-treated alloy, whose lath thickness is less than 5 μm.…”

Section: Figurementioning

confidence: 98%

Manufacturing Ultrafine-Grained Ti-6Al-4V Bulk Rod Using Multi-Pass Caliber-Rolling

Lee

Shih

Lee

et al. 2015

Metals

View full text Add to dashboard Cite

Ultrafine-grained (UFG) Ti-6Al-4V alloy has attracted attention from the various industries due to its good mechanical properties. Although severe plastic deformation (SPD) processes can produce such a material, its dimension is generally limited to laboratory scale. The present work utilized the multi-pass caliber-rolling process to fabricate Ti-6Al-4V bulk rod with the equiaxed UFG microstructure. The manufactured alloy mainly consisted of alpha phase and showed the fiber texture with the basal planes parallel to the rolling direction. This rod was large enough to be used in the industry and exhibited comparable tensile properties at room temperature in comparison to SPD-processed Ti-6Al-4V alloys. The material also showed good formability at elevated temperature due to the occurrence of superplasticity. Internal-variable analysis was carried out to measure the contribution of deformation mechanisms at elevated temperatures in the manufactured alloy. This revealed the increasing contribution of phase/grain-boundary sliding at 1073 K, which explained the observed superplasticity.

show abstract

The morphology and substructure of Ti-Cu martensite

Cited by 62 publications

References 3 publications

Competing Martensitic, Bainitic, and Pearlitic Transformations in a Hypoeutectoid Ti-5Cu Alloy

Competing Martensitic, Bainitic, and Pearlitic Transformations in a Hypoeutectoid Ti-5Cu Alloy

Basic Electrochemical Behavior of Ti-7Cu Alloys for Medical Applications

Manufacturing Ultrafine-Grained Ti-6Al-4V Bulk Rod Using Multi-Pass Caliber-Rolling

Contact Info

Product

Resources

About