Change in anisotropy of mechanical properties with β-phase stability in high Zr-containing Ti-based alloys

Abdel-Hady, Mohamed; Hinoshita, Keita; Fuwa, Hiroki; Murata, Yoshinori; Morinaga, Masahiko

doi:10.1016/j.msea.2007.06.083

Cited by 49 publications

(20 citation statements)

References 19 publications

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“…Previously proposed Ti-6Mo base alloy 28) showed poor thermal stability in shape memory behavior because of the much precipitation of ½ phase. The phase boundary of ¢/¢ + ½ + (¡AA) 43) is near to the limit line of the left side (lower Mdt and higher Bot sides) in the appearance region of the shape memory at 293 K by a dotted line in Fig. 2.…”

Section: Proposal Of Promising Alloys Using Mdt-bot Diagrammentioning

confidence: 83%

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Compositional Optimization of β Type Titanium Alloys with Shape Memory Ability and Their Characteristics

et al. 2015

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The compositions of ¢ type Ti alloys having shape-memory ability above 400 K were proposed by alloying parameters used in the delectrons concept. They were both Ti-6Mo-2Al-1Sn and Ti-6Nb-3Mo which were designed for improvement of thermal stability in shape memory behavior of Ti-6Mo base alloy, preserving the tensile strength of 700 MPa. Their ingots without contamination from the used crucible were produced by cold crucible levitation melting. They consisted of ¢ and ¡AA phases after the cold roll and heat treatment, and their amounts were depended on values in the alloying parameters. The shape recovery rate of 40 and 25% was measured after 4 cycles in the loadingunloading tests in Ti-6Mo-2Al-1Sn and Ti-6Nb-3Mo, respectively. They showed the As temperature above 490 K and improvement of thermal stability because of a much smaller amount of ½ phase than Ti-6Mo. The alloys showed tensile strength of 682 to 718 MPa. These results were caused by exactly prediction of the phase stability, shape memory ability and tensile strength, using alloying parameters.

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Section: Proposal Of Promising Alloys Using Mdt-bot Diagrammentioning

confidence: 83%

“…43) It is considered that more ¢ and ¡AA (or ¡) stabilization in alloys are useful for the suppression of ½ phase even in ¢ + ½ + (¡AA) region in Fig. 2, compared with Ti-6Mo alloy.…”

Section: Proposal Of Promising Alloys Using Mdt-bot Diagrammentioning

confidence: 99%

Compositional Optimization of β Type Titanium Alloys with Shape Memory Ability and Their Characteristics

et al. 2015

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“…3). The results can reflect the change in the {2 0 0}b preferred orientation during cold compression[24]. The I {2 0 0}b / I {1 1 0}b of the solution-treated alloy and the cold-compressed specimens with true strains of 5.3% (A), 35.4% (B), 77.4% (C) and 150.6% (D) are 0.095, 0.016, 0.132, 0.593 and 0.659, respectively…”

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confidence: 79%

Evolution of deformation mechanisms of Ti–22.4Nb–0.73Ta–2Zr–1.34O alloy during straining

Yang

et al. 2010

Acta Materialia

197

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“…46,56) From this B 0 -M d phase stability map, it is possible to estimate the subsequent deformation mode and the macroscopic mechanical properties since stress induced martensitic phase transformation, mechanical twinning or dislocation slip can occur as a function of the chemical stability of ¢ phase. 46,55,61) As it is well known that the shape memory alloys undergo stress-induced martensitic transformation and detwinning of initial twinned martensitic structure upon mechanical loading. 26,52,57) Position of these alloys fall in the twinning region of B 0 -M d phase stability map.…”

Section: )mentioning

confidence: 99%

Comparison of Bond Order, Metal d Orbital Energy Level, Mechanical and Shape Memory Properties of Ti–Cr–Sn and Ti–Ag–Sn Alloys

et al. 2013

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Bond order (B 0 ) and metal d orbital energy level (M d ) values were calculated for our recently developed Ti(6,7)Cr3Sn and Cr substituted Ti(6,7)Ag3Sn alloys developed in this study. Position of these alloys in the B 0 -M d phase stability map developed by Morinaga and co-workers was then determined. Phase constitution, mechanical and shape memory properties were co-related with the position of Ti(6,7)Cr3Sn and Cr substituted Ti(6,7)Ag3Sn alloy in the B 0 -M d phase stability map. Cr substitution with Ag has resulted drastic decrease in the bond order (B 0 ) and metal d orbital energy level (M d ) values, resulting drastic decrease in the strength, fracture strain and shape memory properties. Position of Ti(6,7)Cr3Sn alloys was within the twinning region of B 0 -M d phase stability map and these alloys exhibited good mechanical and shape memory properties due to stress induced martensitic transformation. It is concluded that position of developed TiCrSn and TiAgSn alloys in the B 0 -M d phase stability map not only affect the phase constitution but also the mechanical and shape memory properties.

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Change in anisotropy of mechanical properties with β-phase stability in high Zr-containing Ti-based alloys

Cited by 49 publications

References 19 publications

Compositional Optimization of β Type Titanium Alloys with Shape Memory Ability and Their Characteristics

Compositional Optimization of β Type Titanium Alloys with Shape Memory Ability and Their Characteristics

Evolution of deformation mechanisms of Ti–22.4Nb–0.73Ta–2Zr–1.34O alloy during straining

Comparison of Bond Order, Metal d Orbital Energy Level, Mechanical and Shape Memory Properties of Ti–Cr–Sn and Ti–Ag–Sn Alloys

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Change in anisotropy of mechanical properties with β-phase stability in high Zr-containing Ti-based alloys

Cited by 49 publications

References 19 publications

Compositional Optimization of &beta; Type Titanium Alloys with Shape Memory Ability and Their Characteristics

Compositional Optimization of &beta; Type Titanium Alloys with Shape Memory Ability and Their Characteristics

Evolution of deformation mechanisms of Ti–22.4Nb–0.73Ta–2Zr–1.34O alloy during straining

Comparison of Bond Order, Metal d Orbital Energy Level, Mechanical and Shape Memory Properties of Ti&ndash;Cr&ndash;Sn and Ti&ndash;Ag&ndash;Sn Alloys

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Compositional Optimization of β Type Titanium Alloys with Shape Memory Ability and Their Characteristics

Compositional Optimization of β Type Titanium Alloys with Shape Memory Ability and Their Characteristics

Comparison of Bond Order, Metal d Orbital Energy Level, Mechanical and Shape Memory Properties of Ti–Cr–Sn and Ti–Ag–Sn Alloys