Strain rate effects on tensile deformation behaviors of Ti-10V-2Fe-3Al alloy undergoing stress-induced martensitic transformation

Ma, Xinkai; Li, Fuguo; Cao, Jun; Li, Jinghui; Sun, Zhimei; Zhu, Guangming; Zhou, Shunshun

doi:10.1016/j.msea.2017.10.057

Cited by 67 publications

(28 citation statements)

References 46 publications

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“…According to metallographic observations of deformed specimens, an increase in the strain rate and/or a decrease in the temperature is associated with an increase in the volume fraction of a 0 martensite. A similar trend has been observed by Ma et al [42] and Paradkar and Kamat [43]. The effect of the temperature on the occurrence of the martensitic transformation has been reported by Hamada et al [44].…”

Section: B-treated Ti17 Alloysupporting

confidence: 87%

Impact of the initial microstructure and the loading conditions on the deformation behavior of the Ti17 titanium alloy

et al. 2019

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In this work, the impact of the microstructure and the loading conditions on the mechanical behavior of a brich Ti17 titanium alloy is investigated. For this purpose, two different initial microstructures are considered : (i) a two-phase lamellar a ? b microstructure and (ii) a single-phase equiaxed b-treated microstructure. First, compression tests are performed at different strain rates (from 10 À1 to 10 s-1) and different temperatures (from 25 to 900 C) for both microstructures. Then, optical microscopy, scanning electron microscopy, EBSD and X-ray diffraction analyses of deformed specimens are carried out. Whatever the loading conditions are, the flow stress of the as-received a ? b Ti17 is higher than that of the b-treated Ti17. Also, because of a higher strain-rate sensitivity, the b-treated Ti17 is less prone to shear banding. At low temperatures (i.e., T 450 C), the deformation behavior of both the as-received a ? b and the b-treated Ti17 is controlled by strain hardening. For the b-treated Ti17 alloy, martensitic transformation is systematically detected in this temperature range. The softening behavior of the as-received a ? b Ti17 observed at high temperatures is due to the joint effect of dynamic recrystallization, dynamic transformation , adiabatic heating and morphological texture evolution. For the b-treated Ti17 alloy, when the temperature exceeds 700 C, stressstrain curves display a yield drop phenomenon, which is explained by dynamic recrystallization.

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Section: B-treated Ti17 Alloysupporting

confidence: 87%

Impact of the initial microstructure and the loading conditions on the deformation behavior of the Ti17 titanium alloy

et al. 2019

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“…Near β titanium alloys possess extremely high strength due to precipitation of finely dispersed intragranular α precipitates [10]. However, the improvement of strength is usually accompanied by a decrease in ductility, resulting from unexpected microstructural characteristics, such as grain boundary α [11,12]. Generally, an excellent combination of strength and ductility is strongly dependent on size, morphology, and distribution of secondary α phase [13].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Secondary α Phase during Aging Treatment in Novel near β Ti-6Mo-5V-3Al-2Fe Alloy

et al. 2018

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Evolution of secondary α phase during aging treatment of a novel near β titanium alloy Ti-6Mo-5V-3Al-2Fe(wt.%) was studied by OM, SEM, and TEM. Results indicated that size and distribution of secondary α phase were strongly affected by aging temperature and time. Athermal ω phase formed after super-transus solution treatment followed by water quenching, and promoted nucleation of needle-like intragranular α in subsequent aging process. When aged at 480 °C, fine scaled intragranular α with small inter-particle spacing precipitated within β grains and high ultimate tensile strength above 1500 MPa was achieved. When the aging temperature increased, the size and inter-particle spacing of intragranular α increased and made the strength reduce, but the ductility got improved. When aging temperature reached as high as 600 °C, ω phase disappeared and intragranular α coarsened obviously, resulting in serious decrease of strength. While mutually parallel Widmanstätten α laths formed at the vicinity of β grain boundaries and grew into the internal area of β grains, and significant improvement of ductility was achieved. As the aging time increased from 4 h to 16 h at 600 °C, the intragranular α grew slightly and brought about minor change of mechanical properties.

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“…These results indicate that the high density Ti-rich nano-precipitates promote dislocation pile-up and accumulations inside R-Ta. It is well known that stress induced martensitic phase transformation (SIMT) can also mediate plasticity in titanium alloys [45,46]. In our previous work [47], martensitic transformation only happened when the content of Ta varied from 15 to 28 at%, and the composition of R-Ti is right located in this region.…”

Section: Mechanical Propertiesmentioning

confidence: 74%

Bio-mimic Ti–Ta composite with hierarchical “Brick-and-Mortar” microstructure

et al. 2019

Materialia

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Strain rate effects on tensile deformation behaviors of Ti-10V-2Fe-3Al alloy undergoing stress-induced martensitic transformation

Cited by 67 publications

References 46 publications

Impact of the initial microstructure and the loading conditions on the deformation behavior of the Ti17 titanium alloy

Impact of the initial microstructure and the loading conditions on the deformation behavior of the Ti17 titanium alloy

Evolution of Secondary α Phase during Aging Treatment in Novel near β Ti-6Mo-5V-3Al-2Fe Alloy

Bio-mimic Ti–Ta composite with hierarchical “Brick-and-Mortar” microstructure

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