Evolution of lattice strain and phase transformation of β III Ti alloy during room temperature cyclic tension

Cai, Song; Daymond, Mark R.; Ren, Yang; Schaffer, Jeremy E.

doi:10.1016/j.actamat.2013.07.062

Cited by 21 publications

(10 citation statements)

References 32 publications

(52 reference statements)

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“…Each image consists of 72 diffraction spectra, corresponding to intensities integrated at 5 degrees interval along the 360 degree azimuthal angle. [10,11] It can be seen that Rietveld refinement was able to capture the experimental observations in detail. Based on the overall goodness-of-fit between the experimental and modeling results, the evolution of phase fractions and textures during deformation were evaluated.…”

Section: Materials and Experimentsmentioning

confidence: 87%

“…The experimental setup is similar to that used previously. [10,11] The X-ray wavelength was 0.11165 Å and beam size was 0.5 × 0.5mm 2 . The specimen gauge length was 20 mm.…”

Section: Materials and Experimentsmentioning

confidence: 99%

“…[14] More details are given in previous similar work. [10,11] In order to understand the capability of this alloy on strain recovery, the cold drawn wire was heat treated at different temperatures and time. Heat treated samples were immediately tested on an Instron tensile tester.…”

Section: Materials and Experimentsmentioning

confidence: 99%

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Stress-induced phase transformation in a Ti–17Nb–1Cr alloy

Cai¹,

Schaffer²,

Ren

2016

Materials Research Letters

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In situ synchrotron X-ray diffraction was used to study the deformation behavior of a Ti-17Nb-1Cr alloy at room temperature. Stress-induced martensite (SIM) transformation increased the total recoverable strain. A maximum of ∼ 3.5% strain recovery was obtained after proper heat treatment. Unlike other alloys with a bcc crystal structure, the β-phase has a strong (210) β texture, supporting the previous suggestion that all meta-stable β-Ti alloys may have a similar texture instead of the well-known (110) β texture after axisymmetric deformation. The ω-phase has a (2243) ω texture. The (041) α fiber texture in α -phase was formed from the (210) β texture based on their crystal orientation relationship.Keywords: Synchrotron X-ray, Beta Ti Alloy, Omega Phase, Stress-induced Martensite, Texture Impact Statement: This manuscript reports the stress-induced phase transformation in a new β-Ti alloy with large recoverable strain and unique textures that are not widely known.

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Section: Materials and Experimentsmentioning

confidence: 87%

“…The experimental setup is similar to that used previously. [10,11] The X-ray wavelength was 0.11165 Å and beam size was 0.5 × 0.5mm 2 . The specimen gauge length was 20 mm.…”

Section: Materials and Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Stress-induced phase transformation in a Ti–17Nb–1Cr alloy

Cai¹,

Schaffer²,

Ren

2016

Materials Research Letters

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“…[5,6] A similar phenomenon was seen in a beta Ti alloy. [37] Dislocation density increased with the increasing deformation strain, thus more compression was needed, and the reversal phase transformation was pushed down to a lower stress level (i.e., decreased the lower plateau stress).…”

Section: Evolution Of Intergranular Strains In the Simmentioning

confidence: 99%

“…The experimental setup is similar to that used previously. [37,38] The sample gage length is~25 mm. The beam wavelength is 0.10801 Å , and the beam size is 0.5 9 0.5 mm 2 .…”

Section: Materials and Experimentsmentioning

confidence: 99%

Evolution of Intergranular Stresses in a Martensitic and an Austenitic NiTi Wire During Loading–Unloading Tensile Deformation

Cai¹,

Schaffer²,

et al. 2015

Metall Mater Trans A

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In situ synchrotron X-ray diffraction testing was carried out on a martensitic and an austenitic NiTi wire to study the evolution of internal stresses and the stress-induced martensite (SIM) phase transformation during room temperature tensile deformation. From the point of lattice strain evolution, it is concluded that (1) for the martensitic NiTi wire, detwinning of the [011] B19¢ type II twins and the {010} B19¢ compound twins is responsible for internal strains formed at the early stage of deformation. (2) The measured diffraction moduli of individual martensite families show large elastic anisotropy and strong influences of texture. (3) For the austenitic NiTi wire, internal residual stresses were produced due to transformation-induced plasticity, which is more likely to occur in austenite families that have higher elastic moduli than their associated martensite families. (4) Plastic deformation was observed in the SIM at higher stresses, which largely decreased the lower plateau stresses.

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