Hierarchical {332}&lt;113&gt; twinning in a metastable β Ti-alloy showing tolerance to strain localization

Zhang, J. Y.; Fu, Yangyang; Wu, Yadong; Qian, Bingnan; Chen, Zheng; Inoue, Akihisa; Wu, Yuan; Yang, Yang; Sun, Fan; Li, Ju; Prima, Frédéric

doi:10.1080/21663831.2020.1745920

Cited by 39 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DIC and EBSD evidenced that two specific locations thus seem to concentrate most of the higher strains: the intersection between the twins and the grain boundaries, and the intersection between two twins. The interior of the twins will not be discussed in the following, as secondary mechanisms taking place since they have already been investigated extensively [8,20,[37][38][39][40].…”

Section: Figure 5: A) Ebsd Ipf Image Along the Rolling Direction Of A...mentioning

confidence: 99%

Accommodation mechanisms in strain-transformable titanium alloys

Danard

Martin

Lilensten

et al. 2021

Materials Science and Engineering: A

View full text Add to dashboard Cite

Section: Figure 5: A) Ebsd Ipf Image Along the Rolling Direction Of A...mentioning

confidence: 99%

Accommodation mechanisms in strain-transformable titanium alloys

Danard

Martin

Lilensten

et al. 2021

Materials Science and Engineering: A

View full text Add to dashboard Cite

“…Considering the intricate nature of these mechanisms, researchers have developed and formulated strategies to enhance the strength and plasticity of β-type alloys. For instance, Ren et al [13] and Zhang et al [14] attained a tensile strength exceeding 1.1 GPa and an elongation exceeding 25% by inducing nanoscale twinning during tensile deformation. Similarly, the adjustment of SIMα ′′ can optimize the mechanical properties of titanium alloys.…”

Section: Introductionmentioning

confidence: 99%

Studying Plastic Deformation Mechanism in β-Ti-Nb Alloys by Molecular Dynamic Simulations

Wang,

Huang,

et al. 2024

Metals

View full text Add to dashboard Cite

Using molecular dynamics (MD) simulations, the transition of the plastic deformation mechanism of Ti-Nb alloys during the tensile process was studied, and the effects of temperature, Nb composition, and strain rate on the deformation mechanism were also investigated. The results show that the deformation process of Ti-Nb alloys involves defect formation, followed by twinning and ω-phase transition, and ultimately, dislocation slip occurs. The <111>{112} slip makes the ω-phase easily overcome the transition energy barrier, inducing the phase transition in the twinning process. Increasing temperature will enhance the plasticity and reduce the strength of the material, while increasing Nb composition will have the opposite effect on the deformation. The simulations show a competition between twinning and dislocation slip mechanisms. With the increase in Nb content, the plastic deformation mechanism of the alloy will change from twinning to dislocation slip. In addition, the plastic strain range increases with the increase in the deformation rate in Ti-Nb alloys. At a higher strain rate, the alloy’s plastic strain range is affected by various deformation mechanisms, which significantly influence the plasticity of the material. The findings of this study provide further insights into the design of Ti-Nb-based alloys.

show abstract

“…It was suggested in recent studies that the {332}<113> system plays an important role in the work hardening of β-Ti alloys, and thus that it is a factor in improving their mechanical properties [ 15 ]. Deformation twinning is a phenomenon that causes local shear strain concentrations, with the material either experiencing elongation (and thus a tensile stress) or contraction (compressive stress) along the stress directions [ 16 ]. Thus, in order to gauge the performance of the alloy better, it is imperative to predict the activation of twinning systems successfully.…”

Section: Introductionmentioning

confidence: 99%

{332}<113> and {112}<111> Twin Variant Activation during Cold-Rolling of a Ti-Nb-Zr-Ta-Sn-Fe Alloy

et al. 2022

View full text Add to dashboard Cite

Deformation twinning is a phenomenon that causes local shear strain concentrations, with the material either experiencing elongation (and thus a tensile stress) or contraction (compressive stress) along the stress directions. Thus, in order to gauge the performance of the alloy better, it is imperative to predict the activation of twinning systems successfully. The present study investigates the effects of deformation by cold-rolling on the {332}<113> and {112}<111> twin variant activation in a Ti-30Nb-12Zr-5Ta-2Sn-1.25Fe (wt.%) (TNZTSF) alloy. The Ti-30Nb-12Zr-5Ta-2Sn-1.25Fe (wt.%) alloy was synthesized in a cold crucible induction levitation furnace, under an argon-controlled atmosphere, using high-purity elemental components. The TNZTSF alloy was cold-deformed by rolling, in one single step, with a total deformation degree (thickness reduction) of ε ≈ 1% (CR 1), ε ≈ 3% (CR 3), and ε ≈ 15% (CR 15). The microstructural investigations were carried out with the SEM-EBSD technique in order to determine the grain morphology, grain-size distribution, crystallographic orientation, accumulated strain-stress fields and Schmid Factor (SF) analysis, all necessary to identify the active twin variants. The EBSD data were processed using an MTEX Toolbox ver. 5.7.0 software package. The results indicated that the TNZTSF alloy’s initial microstructure consists of a homogeneous β-Ti single phase that exhibits equiaxed polyhedral grains and an average grain-size close to 71 μm. It was shown that even starting with a 1% total deformation degree, the microstructure shows the presence of the {332}<113> twinning (()[] active twin variant; Schmit factor SF = −0.487); at a 3% total deformation degree, one can notice the presence of primary and secondary twin variants within the same grain belonging to the same {332}<113> twinning system (()[] primary twin variant—SF = −0.460; ()[] secondary twin variant—SF = −0.451), while, at a 15% total deformation degree, besides the {332}<113> twinning system, one can notice the activation of the {112}<111> twinning system (()[] active twin variant—SF = −0.440). This study shows the {332}<113> and {112}<111> twinning variant activation during cold-deformation by rolling in the case of a Ti-30Nb-12Zr-5Ta-2Sn-1.25Fe (wt.%) (TNZTSF) alloy.

show abstract

Hierarchical {332}<113> twinning in a metastable β Ti-alloy showing tolerance to strain localization

Cited by 39 publications

References 18 publications

Accommodation mechanisms in strain-transformable titanium alloys

Accommodation mechanisms in strain-transformable titanium alloys

Studying Plastic Deformation Mechanism in β-Ti-Nb Alloys by Molecular Dynamic Simulations

{332}<113> and {112}<111> Twin Variant Activation during Cold-Rolling of a Ti-Nb-Zr-Ta-Sn-Fe Alloy

Contact Info

Product

Resources

About