On the compressive deformation behavior of new beta titanium alloys designed by d-electron method

Sadeghpour, Saeed; Abbasi, S.M.; Morakabati, M.; Kisko, A.; Karjalainen, L.P.; Porter, David

doi:10.1016/j.jallcom.2018.02.212

Cited by 49 publications

(25 citation statements)

References 52 publications

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“…The present authors have recently introduced a new β Ti alloy (Ti-3873) with the nominal chemical composition Ti-3Al-8Mo-7V-3Cr (wt.%) showing a very high ductility during compressive deformation at room temperature [21]. This high plasticity is similar to that observed in Gum metals [22].…”

Section: Introductionsupporting

confidence: 63%

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Effect of dislocation channeling and kink band formation on enhanced tensile properties of a new beta Ti alloy

Sadeghpour

Abbasi

Morakabati

et al. 2019

Journal of Alloys and Compounds

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Section: Introductionsupporting

confidence: 63%

“…In addition to the strength, the alloy shows an excellent total elongation of 31% (true strain 27%). Recently, the present authors showed that Ti-3873 exhibits a high compressive ductility and good workability [21]. The inset in Fig.…”

Section: Resultsmentioning

confidence: 64%

Effect of dislocation channeling and kink band formation on enhanced tensile properties of a new beta Ti alloy

Sadeghpour

Abbasi

Morakabati

et al. 2019

Journal of Alloys and Compounds

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“…It is worth noting that kink band formation is not as common as plastic deformation mechanisms of slipping and twinning; however it is considered to be an important plastic deformation mechanism in metallic materials exhibiting strong plastic anisotropy, especially in metals and alloys with hcp crystal structure [32]. However, kink band formation has also been reported occurring during the plastic deformation of β titanium alloys with bcc crystal structure [13,14,[31], [32], [33], [34], [35], [36]]. Kink bands, which are defined as local crystallographic bands with an arbitrary degree of rotation, improve the crystal deformability of β titanium alloys during plastic deformation [31,37].…”

Section: Resultsmentioning

confidence: 99%

Effect of thermomechanical treatment on the mechanical and microstructural evolution of a β-type Ti-40.7Zr–24.8Nb alloy

Ozan

Lin²,

Weng

et al. 2019

Bioactive Materials

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In this study, the microstructural evolution and mechanical properties of a newly developed Ti-40.7Zr–24.8Nb (TZN) alloy after different thermomechanical processes were examined. As-cast TZN alloy plates were solution-treated at 890 °C for 1 h, after which the thickness of the alloy plates was reduced by cold rolling at reduction ratios of 20%, 56%, 76%, and 86%. Stress-induced α” formation, {332} <113> β mechanical twinning, and kink band formation were observed in the cold-rolled TZN alloy samples. In the TZN sample after cold rolling at the 86% reduction ratio plus a recrystallization annealing at 890 °C for 1 h, the deformation products of a stress-induced α” phase, {332}<113> β mechanical twinning, and kink bands disappeared, resulting in a fine, equiaxed single β phase. The alloy samples exhibited elongation at rupture ranging from 7% to 20%, Young's modulus ranging from 63 to 72 GPa and tensile strength ranging from 753 to 1158 MPa. The TZN alloy sample after cold rolling and recrystallization annealing showed a yield strength of 803 MPa, a tensile strength of 848 MPa, an elongation at rupture of 20%, and an elastic admissible strain of 1.22%, along with the most ductile fractures during tensile testing.

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“…That allows to draw the limits of stability for the β-phase, and then to target the instability region for the TRIP/TWIP alloy design. This method has been proven to be efficient and easy to use [1,2,[14][15][16].…”

Section: Alloy Design Approachmentioning

confidence: 99%

From single phase to dual-phase TRIP-TWIP titanium alloys: Design approach and properties

et al. 2020

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Aiming at increasing the yield strength of transformation and twinning induced plasticity (TRIP and TWIP) titanium alloys while maintaining a good work-hardening, a dual-phase α/β alloy is designed and studied. The composition Ti-7 Cr-1.5 Sn (wt.%) is proposed, based on an approach coupling Calphad calculations and classical Bo-Md design tool used in Ti-alloys. Its microstructure is made of 20% of α precipitates in a β matrix, the matrix having optimal Bo and Md parameters for deformation twinning and martensitic transformation. The alloy indeed displays a yield strength of 760 MPa, about 200 MPa above that of a Ti-8.5Cr-1.5Sn (wt.%) single β phase TRIP/TWIP alloy, combined with good work-hardening and ductility. In situ synchrotron X ray diffraction and post-mortem electron back-scattered analyses are performed to characterize the deformation mechanisms. They 2 evidence that the TRIP and TWIP mechanisms are successfully obtained in the material, validating the design strategy. The interaction of the precipitates with the {332}<113> β twins is analyzed, evidencing that the precipitates are sheared when hit by a twin, and therefore do not hinder the propagation of the twins. The nature of the interaction is discussed, as well as the impact of the precipitates on the mechanical properties.

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On the compressive deformation behavior of new beta titanium alloys designed by d-electron method

Cited by 49 publications

References 52 publications

Effect of dislocation channeling and kink band formation on enhanced tensile properties of a new beta Ti alloy

Effect of dislocation channeling and kink band formation on enhanced tensile properties of a new beta Ti alloy

Effect of thermomechanical treatment on the mechanical and microstructural evolution of a β-type Ti-40.7Zr–24.8Nb alloy

From single phase to dual-phase TRIP-TWIP titanium alloys: Design approach and properties

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