Stress induced products and ductility due to lattice instability of β phase single crystal of Ti-Mo alloys

Hida, Moritaka; Sukedai, Eiichi; Henmi, Chiyoko; Sakaue, Kiyoshi; Terauchi, Hikaru

doi:10.1016/0001-6160(82)90167-5

Cited by 42 publications

(13 citation statements)

References 21 publications

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“…An increase in the intensity of the ½ phase in metastable ¢-type Ti alloys after deformation has been observed by other researchers. 1,2,16,17) These findings confirm that deformation-induced ½ phase transformation occurs in all Ti(1822)V alloys during cold rolling. The orientation relationships between the deformation-induced ½ phase and ¢ matrix are { 111} ¢ // {0001} ½ and h110i ¢ == h11 20i ½ , which are the same as the orientation relationships between the athermal ½ phase and ¢ matrix.…”

Section: Microstructuressupporting

confidence: 60%

Effect of Deformation-Induced ω Phase on the Mechanical Properties of Metastable β-Type Ti–V Alloys

et al. 2012

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A series of metastable ¢-type binary Ti(1822)V alloys were prepared to investigate the effect of deformation-induced products (deformation-induced ½ phase transformation and mechanical twinning) on the mechanical properties of metastable ¢-type titanium alloys. The microstructures, Young's moduli, and tensile properties of the alloys were systemically examined.Ti(1820)V alloys subjected to solution treatment comprise a ¢ phase and a small amount of athermal ½ phase, while Ti22V alloy subjected to solution treatment consists of a single ¢ phase. Ti(1820)V alloys subjected to solution treatment exhibit relatively low Young's moduli and low tensile strengths as compared to cold-rolled specimens. Both deformation-induced ½ phase transformation and {332} ¢ h113i ¢ mechanical twinning occur in all of the alloys during cold rolling. The occurrences of {332} ¢ h113i ¢ mechanical twinning and deformationinduced ½ phase transformation are dependent on the ¢ stability of the alloys. After cold rolling, all of the alloys comprise a ¢ phase and an ½ phase. The Young's moduli of Ti(1822)V alloys increase because of the formation of a deformation-induced ½ phase during cold rolling. The significant increase in tensile strength is attributed to the combined effect of the deformation-induced ½ phase transformation and workhardening during cold rolling.

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Section: Microstructuressupporting

confidence: 60%

Effect of Deformation-Induced ω Phase on the Mechanical Properties of Metastable β-Type Ti–V Alloys

et al. 2012

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“…An increase in the intensity of the ω ath phase after deformation has been observed by several investigators [33][34][35] in β Ti alloys. In these studies the reason for the formation of the stress-induced ω after rolling was not understood.…”

Section: Temmentioning

confidence: 71%

On the mechanism of superelasticity in Gum metal

et al. 2009

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“…In metastable b Ti alloys, the activated twinning system shifts from {1 1 2}h1 1 1i to {3 3 2}h1 1 3i when the b phase stability decreases [4,17,22,48,49]. For example, in a deformed Ti-14Mo single crystal [28], two twinning modes were observed together. However, {3 3 2} twins were observed in a much larger volume fraction when compared to {1 1 2} twins in that material.…”

Section: Sim a 00 Transformation And Mechanical Twinningmentioning

confidence: 99%

“…in some specific Ti alloys [3,[20][21][22][23][24][25]. These mechanisms can be activated in various alloys exhibiting the shape memory effect [19], superelasticity [18][19][20]23,24,26] or strain-hardening behaviour [3,4,27,28].…”

Section: Introductionmentioning

confidence: 99%

Investigation of early stage deformation mechanisms in a metastable β titanium alloy showing combined twinning-induced plasticity and transformation-induced plasticity effects

et al. 2013

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International audienceAs expected from the alloy design procedure, combined Twinning Induced Plasticity (TWIP) and Transformation Induced Plasticity (TRIP) effects are activated in a metastable β Ti-12(wt.%)Mo alloy. In-situ Synchrotron X-ray diffraction (XRD), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) observations were carried out to investigate the deformation mechanisms and microstructure evolution sequence. In the early deformation stage, primary strain/stress induced phase transformations (β->ω and β->α'') and primary mechanical twinning ({332}<113> and {112}<111>) are simultaneously activated. Secondary martensitic phase transformation and secondary mechanical twinning are then triggered in the twinned β zones. The {332}<113> twinning and the subsequence secondary mechanisms dominate the early stage deformation process. The evolution of the deformation microstructure results in a high strain hardening rate (~2GPa) bringing about high tensile strength (~1GPa) and large uniform elongation (> 0.38)

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Stress induced products and ductility due to lattice instability of β phase single crystal of Ti-Mo alloys

Cited by 42 publications

References 21 publications

Effect of Deformation-Induced ω Phase on the Mechanical Properties of Metastable β-Type Ti–V Alloys

Effect of Deformation-Induced ω Phase on the Mechanical Properties of Metastable β-Type Ti–V Alloys

On the mechanism of superelasticity in Gum metal

Investigation of early stage deformation mechanisms in a metastable β titanium alloy showing combined twinning-induced plasticity and transformation-induced plasticity effects

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Stress induced products and ductility due to lattice instability of β phase single crystal of Ti-Mo alloys

Cited by 42 publications

References 21 publications

Effect of Deformation-Induced &omega; Phase on the Mechanical Properties of Metastable &beta;-Type Ti&ndash;V Alloys

Effect of Deformation-Induced &omega; Phase on the Mechanical Properties of Metastable &beta;-Type Ti&ndash;V Alloys

On the mechanism of superelasticity in Gum metal

Investigation of early stage deformation mechanisms in a metastable β titanium alloy showing combined twinning-induced plasticity and transformation-induced plasticity effects

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Effect of Deformation-Induced ω Phase on the Mechanical Properties of Metastable β-Type Ti–V Alloys

Effect of Deformation-Induced ω Phase on the Mechanical Properties of Metastable β-Type Ti–V Alloys