Room temperature deformation and mechanisms of slip transmission in oriented single-colony crystals of an α/β titanium alloy

Suri, Satyarth; Viswanathan, G.B.; Neeraj, T.; Hou, D.-H.; Mills, Michael J.

doi:10.1016/s1359-6454(98)00364-4

Cited by 326 publications

(176 citation statements)

References 14 publications

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“…However, the study did not continue except those of Ti-6Al-2Cb-1Ta-1Mo alloy 4) and Ti-0.4Mn alloy 5) at around 1990. In the 1990s, the group of Mills started studying the phenomena using Ti-6Al-2Sn-4Zr-2Mo alloy 6,7) and Ti-6Al alloy. [7][8][9] It was suggested 2) that the mechanism of the ambienttemperature creep is due to Andrade creep.…”

Section: Introductionmentioning

confidence: 99%

Categorization of Ambient-Temperature Creep Behavior of Metals and Alloys on their Crystallographic Structures

et al. 2006

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The creep behavior at an ambient temperature of typical h.c.p., b.c.c. and f.c.c. metals and alloys of annealed states were surveyed. Cubic metals and alloys demonstrated negligible creep strain under all stress ranges. In contrast, h.c.p. metals and alloys demonstrated significant creep behavior. In particular, Ti-6Al-4V alloy and CP-Ti metal showed accumulated large creep strains. The difference among metals and alloys were negligible, for Mg and Zr. After being cold rolled, Ti-6Al-4V alloy and CP-Ti metal showed less significant creep behavior.

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Section: Introductionmentioning

confidence: 99%

Categorization of Ambient-Temperature Creep Behavior of Metals and Alloys on their Crystallographic Structures

et al. 2006

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“…In the present study, for hcp1 phase with c/a ratio > 1.633, slip takes place in the basal plane and for hcp2 phase (Ti, Zr type) with c/a ratio <1.633, slip takes place in the prismatic plane [19]. Another explanation for decrease of microhardness in case of Cd-29.40Ag and Cd-44.80Ag and increase immensely in case of Cd-48.7Ag can be cited from the conclusion of work of Neeraj et al, Suri et al Savage et al and others on the theory of co-growth of bcc and hcp phase [20][21][22][23][24][25][26] in Titanium alloy system, where it was assumed a bcc phase and hcp phase can grow simultaneously by sharing common closed packed planes, (111) of bcc (described as β-phase) and (0001) plane of hcp phase (described as α-phase) as schematically drawn in fig. 6.…”

Section: Resultsmentioning

confidence: 99%

“…6. Suri et al [22] argued that slip transmission across the α-β interfaces is strongly dependent on the a system orientation with respect to the interface, in the context of the BOR. Furthermore, they did not observe interface sliding.…”

Section: Resultsmentioning

confidence: 99%

A Case Study in Hardening of Cd-Ag Alloys with Solute Concentration

Bose¹

2018

IJRASET

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“…2d). This special OR may facilitate the slip transmission [37,38]. The nature and distribution of gliding of sample B evolves significantly with increasing tensile strain.…”

Section: Slip Line Morphology and Distributionmentioning

confidence: 95%

Study of plastic deformation mechanisms in TA15 titanium alloy by combination of geometrically necessary and statistically-stored dislocations

et al. 2016

International Journal of Materials Research

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Study of plastic deformation mechanisms in TA15 titanium alloy by combination of geometrically necessary and statistically-stored dislocationsThis study combines geometrically necessary dislocation analysis and statistically-stored dislocation identification to investigate plastic deformation mechanisms in TA15 titanium alloy. Tensile tests were conducted up to different strains at room temperature. The slip lines were observed and identified using high resolution scanning electron microscopy. Geometrically necessary dislocations were calculated based on strain gradient theories. The statisticallystored dislocations were studied using transmission electron microscopy under two beam conditions. The results indicate that the ratio of -type geometrically necessary dislocation density to -type decreases from 5 -8 to 1 -3 with increasing strain from 0.8 % to 2.0 %. The -type slip is the dominant deformation mechanism at the early stage of plastic deformation, whereas -slips become dominant with further increase in deformation strain.Keywords: Deformation mechanisms; Geometrically necessary dislocation; Slip line; Transmission electron microscopy; Electron backscatter diffraction 1. Introduction TA15, also known as Ti-6Al-2Zr-1Mo-1V, is a typical near a titanium alloy. The microstructure of TA15 is composed of dominant a lamellae (hexagonal-close-packed, hcp) and a few residual beta phases (body-centered-cubic, bcc) at room temperature [1]. Because of its high specific strength and excellent corrosion resistance at the evaluated temperature, TA15 titanium alloy is preferentially used in aviation and aerospace industries [2 -9].Generally, because of low symmetry of the hcp crystal structure and the special lamella grain morphology, the near a titanium alloy exhibits low tensile ductility, high strength and anisotropic mechanical properties compared to beta and a+b titanium alloy [10]. The deformation mechanisms in hcp metal are complex because of the competition between dislocation slip (including basal, prismatic pyramidal slip model) and twinning under different deformation conditions [11,12]. Especially, due to a relatively high Al content, twinning in alloyed TA15 tends to be suppressed and dislocation slip is the dominant plastic deformation mechanism. According to von-Mises criterion, at least five independent slip systems are required for homogeneous plastic deformation. Therefore, in addition to basal <11 20> {0002}, prismatic <11 20>{10 10} and pyramidal <11 20> {10 11} slip modes, the non-basal <11 23>{10 11} and/or {11 22} <11 23> slips are invoked [13]. However, the effect of addition slip modes on full plastic deformation of titanium and titanium alloys is still debatable [14]. Therefore, it is very important to study deformation mecha-

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Room temperature deformation and mechanisms of slip transmission in oriented single-colony crystals of an α/β titanium alloy

Cited by 326 publications

References 14 publications

Categorization of Ambient-Temperature Creep Behavior of Metals and Alloys on their Crystallographic Structures

Categorization of Ambient-Temperature Creep Behavior of Metals and Alloys on their Crystallographic Structures

A Case Study in Hardening of Cd-Ag Alloys with Solute Concentration

Study of plastic deformation mechanisms in TA15 titanium alloy by combination of geometrically necessary and statistically-stored dislocations

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