Cyclic deformation behavior and fatigue lives of ultrafine-grained Ti-6AL-4V ELI alloy for medical use

Saitova, Lilia R.; Höppel, Heinz Werner; Semenova, Irina P.; Valiev, Ruslan Z.

doi:10.1016/j.ijfatigue.2008.08.007

Cited by 93 publications

(75 citation statements)

References 31 publications

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“…3.15 [101]. Similar effect was also observed in the SPD-processed Ti-6Al-4V ELI alloy [95]. Notable improvement of HCF properties was observed in the ECAP-processed Fe-36 % Ni Invar (Table 3.2), which showed many advantages compared with other commercially available dimensionally stable alloys [86].…”

Section: High-cycle Fatigue Behavior Of Nanostructured Metallic Matersupporting

confidence: 64%

Multifunctional Properties of Bulk Nanostructured Metallic Materials

Sabirov

Enikeev

Murashkin

et al. 2015

Bulk Nanostructured Materials With Multifunctional Properties

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This chapter focuses on multifunctional properties of bulk nanostructured metallic materials and structure-properties relationship therein. The most important structural factors affecting mechanical, physical, and chemical properties of the nanomaterials are discussed, and the strategies to their further improvement are outlined. Special attention is paid to nanostructural design for simultaneous improvement of mutually exclusive properties. Superstrength and Enhanced Mechanical PropertiesAlthough the mechanical and functional properties of all polycrystalline metallic materials are determined by several factors, the grain size of the material generally plays the most significant and often a dominant role. Thus, the strength of different polycrystalline materials is related to the grain size, d, through the Hall-Petch equation which states that the yield stress, σ y , is given bywhere σ o is termed the friction stress and k y the Hall-Petch constant [1,2]. It follows from Eq. 3.1 that the strength increases with a reduction in the grain size and this has led to an ever-increasing interest in fabricating materials with extremely small grain sizes. The fabrication of bulk samples and billets using equal channel angular pressing (ECAP), high pressure torsion (HPT), and other severe plastic deformation (SPD) techniques was a crucial first step in initiating investigations into the properties of bulk nanomaterials because the use of SPD processing permitted, and subsequently fully supported, a series of systematic studies using various nanostructured metallic materials including commercial alloys [3][4][5][6][7][8]

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Section: High-cycle Fatigue Behavior Of Nanostructured Metallic Matersupporting

confidence: 64%

Multifunctional Properties of Bulk Nanostructured Metallic Materials

Sabirov

Enikeev

Murashkin

et al. 2015

Bulk Nanostructured Materials With Multifunctional Properties

View full text Add to dashboard Cite

show abstract

“…Therefore, the tensile properties of the caliber-rolled Ti-6Al-4V alloy were investigated at both room and elevated temperatures. Figure 7 shows room-temperature tensile properties of the caliber-rolled rod as well as UFG Ti-6Al-4V alloys in the literature [5][6][7][8]. The caliber-rolled rod provided the high yield stress (YS = 1345 MPa) and ultimate tensile stress (UTS = 1425 MPa) due to its UFG structure and resultant grain-boundary strengthening.…”

Section: Figurementioning

confidence: 99%

“…In addition, the grain refinement provides the increasing sources of grain-boundary sliding and hence induces the superplastic behavior at elevated temperatures. It is thus natural that ultrafine-grained (UFG) titanium alloys have been actively studied for decades [5][6][7][8][9]. To attain the UFG structure, most of previous works have utilized a severe plastic deformation (SPD) process, such as equal-channel angular pressing (ECAP) and high-pressure torsion (HPT) [10].…”

Section: Introductionmentioning

confidence: 99%

Manufacturing Ultrafine-Grained Ti-6Al-4V Bulk Rod Using Multi-Pass Caliber-Rolling

Lee

Shih

Lee

et al. 2015

Metals

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Ultrafine-grained (UFG) Ti-6Al-4V alloy has attracted attention from the various industries due to its good mechanical properties. Although severe plastic deformation (SPD) processes can produce such a material, its dimension is generally limited to laboratory scale. The present work utilized the multi-pass caliber-rolling process to fabricate Ti-6Al-4V bulk rod with the equiaxed UFG microstructure. The manufactured alloy mainly consisted of alpha phase and showed the fiber texture with the basal planes parallel to the rolling direction. This rod was large enough to be used in the industry and exhibited comparable tensile properties at room temperature in comparison to SPD-processed Ti-6Al-4V alloys. The material also showed good formability at elevated temperature due to the occurrence of superplasticity. Internal-variable analysis was carried out to measure the contribution of deformation mechanisms at elevated temperatures in the manufactured alloy. This revealed the increasing contribution of phase/grain-boundary sliding at 1073 K, which explained the observed superplasticity.

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“…The ultra-fine grained (UFG) commercial purity titanium (CP Ti) and Ti-6Al-4V alloy have already been prepared by severe-plastic deformation techniques (SPD) [3,4,5]. UFG commercial purity Ti and Ti alloys became known for their increased strength and enhanced fatigue performance [6]. Moreover, UFG materials exhibit also higher corrosion resistance and improved biocompatibility [7,8].…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution in ultrafine-grained Ti and Ti-6Al-7Nb alloy processed by severe plastic deformation

Stráský

Harcuba

Hájek

et al. 2014

IOP Conf. Ser.: Mater. Sci. Eng.

Self Cite

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Influence of UFG structure formation on mechanical and fatigue properties in Ti6Al-7Nb alloy V V Polyakova, V N Anumalasetty, I P Semenova et al. Abstract. Unique in-situ electric resistivity measurement was utilized to identify microstructural changes in ultra-fine grained commercially pure titanium and Ti-6Al-7Nb alloy. Both materials were prepared by equal channel angular pressing. Changes in resistivity evolution during in-situ heating were compared to scanning electron microscopy observations. Both materials are stable up to 440°C. Further heating at rate 5°C/min causes recovery and recrystallization of UFG structure. At 650°C the microstructure is fully recrystallized. High resolution in-situ electric resistivity measurement is capable of detecting recovery and recrystallization in UFG CP Ti and Ti-6Al-7Nb alloy.

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Cyclic deformation behavior and fatigue lives of ultrafine-grained Ti-6AL-4V ELI alloy for medical use

Cited by 93 publications

References 31 publications

Multifunctional Properties of Bulk Nanostructured Metallic Materials

Multifunctional Properties of Bulk Nanostructured Metallic Materials

Manufacturing Ultrafine-Grained Ti-6Al-4V Bulk Rod Using Multi-Pass Caliber-Rolling

Microstructure evolution in ultrafine-grained Ti and Ti-6Al-7Nb alloy processed by severe plastic deformation

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