Effect of mode of deformation by rolling on texture evolution and yield locus anisotropy in a multifunctional β titanium alloy

Manda, Premkumar; Himabindu, V.S.; Banumathy, S.; Bhattacharjee, Anup Kumar; Singh, A.K.

doi:10.1016/j.msea.2012.04.077

Cited by 40 publications

(12 citation statements)

References 12 publications

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“…Therefore, lowering the extent of materials anisotropy is meaningful from theoretical and experimental aspects. Premkumar et al [6] describes the evolution of texture during different modes of deformation by cold rolling of a multifunctional beta titanium alloy and the texture hardening occurs with increase in rolling reductions in all the modes of rolling. A phenomenological model and a multiscale crystal plasticity model were put forward in theory by Hammami et al.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of ductility, weakening of anisotropy behavior and local recrystallization in cold-rolled Ti-6Al-4V alloy strips by high-density electropulsing treatment

Yang

Song

et al. 2014

Appl. Phys. A

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The effect of high-density electropulsing treatment (EPT) on the microstructure, mechanical properties and fracture behavior of cold-rolled Ti-6Al-4V alloy strip was investigated. The results indicated that EPT accelerated the local recrystallization process tremendously in predeformed titanium alloy. The EPT-induced microstructural change resulted in remarkably increasing elongation to failure while remained tensile strength unchanged. In addition, anisotropy behavior of mechanical property is weakened dramatically. A mechanism for rapid local recrystallization in low temperature during EPT was proposed based on the reduction of nucleation thermodynamic barrier and enhancement of atomic diffusion. Uneven fractures of different direction specimens with quasi-cleavage fracture mode were gradually evolved into uniform ductile fracture mode with transgranular dimples under EPT.

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Section: Introductionmentioning

confidence: 99%

Enhancement of ductility, weakening of anisotropy behavior and local recrystallization in cold-rolled Ti-6Al-4V alloy strips by high-density electropulsing treatment

Yang

Song

et al. 2014

Appl. Phys. A

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“…Some studies about microstructures and mechanical properties of gum metal have reported that the 'marblelike' microstructure can appear when gum metal is cold worked above 90% in the area reduction. [6][7][8]25 In the present study, the specimen was subjected to the severe cold working up to 77% in the area reduction after tensile test (Table 1). Therefore, the 'marble-like' microstructure would be expected to appear near fracture location of tensile specimen.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

High‐cycle fatigue properties of beta Ti alloy 55Ti–30Nb–10Ta–5Zr, gum metal

Akita

Nakajima

Uematsu

et al. 2014

Fatigue Fract Eng Mat Struct

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A B S T R A C T This paper describes the fatigue properties of the beta titanium alloy 55Ti-30Nb-10Ta-5Zr, generally referred to as 'Gum Metal'. Rotating bending fatigue tests have been performed in laboratory air and in a 3% NaCl aqueous solution. The results obtained were compared with those of a conventional beta titanium alloy, Ti-22V-4Al. In tensile tests, 55Ti-30Nb-10Ta-5Zr indicated elasticity and microplasticity in the elastic region. Thus, the elastic modulus slightly decreased with an increasing strain, and the work hardening was minimal during plastic deformation. The mechanical properties of both of the alloys were comparable. The fatigue strength of 55Ti-30Nb-10Ta-5Zr in laboratory air was higher than that of Ti-22V-4Al, which could be attributed to the higher fatigue crack initiation resistance of 55Ti-30Nb-10Ta-5Zr than Ti-22V-4Al, while the resistance to small fatigue crack growth was similar. The fatigue strength of 55Ti-30Nb-10Ta-5Zr in laboratory air and in the 3% NaCl aqueous solution was analogous. In addition, corrosion pits were not observed in the run-out specimen in the 3% NaCl aqueous solution, indicating a high resistance of 55Ti-30Nb-10Ta-5Zr against corrosion fatigue.

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“…In the past decade, Ti-Nb-based gum metal has drawn significant attention due to its superior mechanical properties and the complexity of the reported deformation mechanisms [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. It exhibits significantly extended elastic regime (with a low elastic modulus of *40 GPa) and plastic deformation regime (with very low strain hardening rate).…”

Section: Introductionmentioning

confidence: 99%

Damage resistance in gum metal through cold work-induced microstructural heterogeneity

et al. 2015

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Cold-worked alloys exhibit high strength, but suffer from limited ductility. In contrast, Ti-based gum metal was reported to exhibit high strength combined with good ductility upon severe pre-straining. Motivated by this anomaly, we systematically studied the evolution of gum metal microstructure during severe cold working (swaging and rolling) and the resulting deformation and damage micro-mechanical mechanisms during follow-up tensile deformation. To this end, various experimental in situ and post-mortem methodologies are employed, including scanning electron microscopy imaging, high-resolution electron backscatter diffraction mapping and transmission electron microscopy. These observations reveal that intense grain refinement takes place through dislocation plasticitydominated deformation banding upon cold working. The observed enhancement in crack blunting and failure resistance which prolongs the post-necking ductility of gum metal during follow-up tensile straining can be attributed to the deformation-induced development of local heterogeneities in texture and grain size.

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Effect of mode of deformation by rolling on texture evolution and yield locus anisotropy in a multifunctional β titanium alloy

Cited by 40 publications

References 12 publications

Enhancement of ductility, weakening of anisotropy behavior and local recrystallization in cold-rolled Ti-6Al-4V alloy strips by high-density electropulsing treatment

Enhancement of ductility, weakening of anisotropy behavior and local recrystallization in cold-rolled Ti-6Al-4V alloy strips by high-density electropulsing treatment

High‐cycle fatigue properties of beta Ti alloy 55Ti–30Nb–10Ta–5Zr, gum metal

Damage resistance in gum metal through cold work-induced microstructural heterogeneity

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