Strain-rate effect on work-hardening behavior in β-type Ti-10Mo-1Fe alloy with TWIP effect

Ji, Xin; Emura, Satoshi; Min, Xiaohua; Tsuchiya, Koichi

doi:10.1016/j.msea.2017.09.055

Cited by 63 publications

(17 citation statements)

References 48 publications

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“…8 × 10 −5 s −1 and high strain rate ˙ = 2 . 8 × 10 −1 s −1 [24] . The alloy exhibited clear strain-rate-dependent performance.…”

Section: Model Validationmentioning

confidence: 97%

“…This diagram has been extensively utilised to produce alloys with desired TWIP or combined TWIP/TRIP effects [4] . The electronic parameters of TWIP Ti alloys [23][24][25][26][27][28][29][30] were calculated and the alloy compositions are located in the Bo − Md map in Fig. 1 .…”

Section: Ti-mo Vectormentioning

confidence: 99%

“…Tensile stress-strain curves of TWIP Ti alloys at room temperature [23,24,26,[28][29][30]32] . The yield stress can achieve over 600 MPa with controlled grain size and solid solution hardening.…”

Section: Figmentioning

confidence: 99%

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Microstructural Evolution and Strain-Hardening in TWIP Ti Alloys

Zhao

Dye

et al. 2019

SSRN Journal

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a b s t r a c tA multiscale dislocation-based model was built to describe, for the first time, the microstructural evolution and strain-hardening of {332} 113 TWIP (twinning-induced plasticity) Ti alloys. This model not only incorporates the reduced dislocation mean free path by emerging twin obstacles, but also quantifies the internal stress fields present at β-matrix/twin interfaces. The model was validated with the novel Ti-11Mo-5Sn-5Nb alloy (wt.%), as well as an extensive series of alloys undergoing {332} 113 twinning at various deformation conditions. The quantitative model revealed that solid solution hardening is the main contributor to the yield stress, where multicomponent alloys or alloys containing eutectoid β-stabilisers exhibited higher yield strength. The evolution of twinning volume fraction, intertwin spacing, dislocation density and flow stress were successfully described. Particular attention was devoted to investigate the effect of strain rate on the twinning kinetics and dislocation annihilation. The modelling results clarified the role of each strengthening mechanism and established the influence of phase stability on twinning enhanced strain-hardening. Strain-hardening stems from the formation of twin obstacles in early stages, whereas the internal stress fields provide a long-lasting strengthening effect throughout the plastic deformation. A tool for alloy design by controlling TWIP is presented.

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“…8 × 10 −5 s −1 and high strain rate ˙ = 2 . 8 × 10 −1 s −1 [24] . The alloy exhibited clear strain-rate-dependent performance.…”

Section: Model Validationmentioning

confidence: 97%

Section: Ti-mo Vectormentioning

confidence: 99%

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Microstructural Evolution and Strain-Hardening in TWIP Ti Alloys

Zhao

Dye

et al. 2019

SSRN Journal

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“…The activation of these twinning modes strongly depends on the lattice parameters of β and αʺ martensite [19,28]. For instance, Inamura et al [19] reported the activation of different twinning modes in Ti- (33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45)(46)Nb-3Al (wt.%) alloys, namely {111} α"type I, <211> αʺ -type II and {011} αʺ -compound twinning, which is associated with Nb content.…”

Section: Introductionmentioning

confidence: 99%

Twinning behavior of orthorhombic-α” martensite in a Ti-7.5Mo alloy

Gutiérrez-Urrutia

Emura

et al. 2019

Science and Technology of Advanced Materials

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Deformation microstructure of orthorhombic-α" martensite in a Ti-7.5Mo (wt.%) alloy was investigated by tracking a local area of microstructure using scanning electron microscopy, electron back-scattered diffraction, and transmission electron microscopy. The as-quenched α" plates contain {111} α"-type I transformation twins generated to accommodate transformation strain from bcc-β to orthorhombic-α" martensite. Tensile deformation up to strain level of 5% induces {112} α"-type I deformation twins. The activation of {112} α"-type I deformation twinning mode is reported for the first time in α" martensite in β-Ti alloys. {112} α"-type I twinning mode was analyzed by the crystallographic twinning theory by Bilby and Crocker and the most possible mechanism of atomic displacements (shears and shuffles) controlling the newly reported {112} α"-type I twinning were proposed.

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“…Additionally, the common deformation twinning modes in β-type titanium alloys include {112}<111> and {332}<113> twins [10][11][12], and thus the predominant deformation mechanism corresponds to {332}<113> twinning formation only for β-type Ti alloys including Ti-Nb base [13] and Ti-Mo-based alloys at room temperature [14]. The {332}<113> twinning exhibits superior mechanical properties such as high elongation percentage (40% in Ti-Mo alloy) [14] and high strength(yield strength 750MPa roughly in Ti-Mo alloy) [15]. Specifically, {332}<113> twinning was first identified in a Ti-15Mo-6Zr-4Sn (wt %) β-type titanium alloy in the 1970s by Blackburn et al [16].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of {332}<113> Twinning Formation in Cold-Rolled Ti-Nb-Ta-Zr-O Alloy

Sun

Chen

2018

Metals

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In this study, the mechanism of {332}<113> twinning formation in cold-rolled Ti-35Nb-2Ta-3Zr-O (wt %) alloy was investigated based on the Taylor-Bishop-Hill theory. The experimental data of crystal orientation in the rolling bite zone was obtained via electron back-scattered diffraction (EBSD). The deformation energy of {332}<113> twinning in the propagation stage was calculated using data from EBSD in terms of the Hall-Petch-type relation. The calculation results revealed that the mechanism of {332}<113> twinning formation in β-type Ti-35Nb-2Ta-3Zr-O (wt %) alloy contained two valid models, namely the shear-shuffle model and α″-assisted twinning model. This can help to clarify the mechanism of {332}<113> twinning formation further.

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Strain-rate effect on work-hardening behavior in β-type Ti-10Mo-1Fe alloy with TWIP effect

Cited by 63 publications

References 48 publications

Microstructural Evolution and Strain-Hardening in TWIP Ti Alloys

Microstructural Evolution and Strain-Hardening in TWIP Ti Alloys

Twinning behavior of orthorhombic-α” martensite in a Ti-7.5Mo alloy

Mechanism of {332}<113> Twinning Formation in Cold-Rolled Ti-Nb-Ta-Zr-O Alloy

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