Grain Refinement and Mechanical Properties of CP‐Ti Processed by Warm Accumulative Roll Bonding

Milner, Justin L.; Abu-Farha, Fadi; Bunget, Cristina

doi:10.1002/9781118663547.ch5

Cited by 10 publications

(10 citation statements)

References 24 publications

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“…This general trend, tensile strength increase as a function of the number of ARB cycles, is consistent with the results reported in the literature for CP-Ti and other materials; evidence of this can be found in almost every effort involving ARB processing [6,7,18,19,29]. In a recent effort, it was shown that the increase in strength for CP-Ti closely follows the Hall-Petch relationship, thus providing evidence that grain refinement is the main driving factor for strength increase in the material (for grain size levels as low as ~100nm) [29]. Figures 3 and 4 indicate that the main difference between the flow curves of the samples processed at the two temperatures is the degree of strain softening after ultimate tensile strength was reached.…”

Section: Warm Temperature Arb Processingsupporting

confidence: 91%

The Effect of Warm Accumulative Roll Bonding and Post Process Treatment on Microstructure and Mechanical Behavior of CP-Ti

Milner

Abu-Farha

2013

Volume 2: Systems; Micro and Nano Technologies; Sustainable Manufacturing

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Accumulative Roll Bonding (ARB), a severe plastic deformation technique, was used in this study to process commercially pure titanium (CP-Ti) sheets at selected warm temperatures. Post-processing treatments at selected conditions were also performed on the ARB processed material, following each ARB processing cycle. Mechanical characterization and microstructural examination were carried out on the processed and post processed material to track the evolution of the microstructure, the changes in strength and ductility, and their relationships with regard to one another. Though the temperatures and processing conditions covered here are limited, it was found that ARB processing temperature affects the resultant flow behavior of the material. Furthermore, it was shown that post processing treatment of the ARB processed material can increase both strength and ductility of the material; the latter can be used as an effective tool for further controlling the structure and properties of the ARB-processed material.

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Section: Warm Temperature Arb Processingsupporting

confidence: 91%

The Effect of Warm Accumulative Roll Bonding and Post Process Treatment on Microstructure and Mechanical Behavior of CP-Ti

Milner

Abu-Farha

2013

Volume 2: Systems; Micro and Nano Technologies; Sustainable Manufacturing

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“…Recently, research works are being carried out controlling annealing temperature, annealing time, preheat temperature, percentage of thickness reduction, and number of cycles of ARB. Furthermore, it has already been revealed with various research works that the plastic deformation and severe plastic deformation performed in RB and ARB, respectively, for relatively light-weight ductile metals (Saito et al 1998;Krallics and Lenard 2004;Costa et al 2006;Toroghinejad et al 2013;Milner et al 2013;Xing et al 2002;Shaarbaf and Toroghinejad 2008;Jamaati and Toroghinejad 2010;Saito et al 1999;Tsuji et al 1999). …”

Section: Controlling Factors Of Rb and Arbmentioning

confidence: 98%

“…The achievable range to manufacture fine grains (average diameter <10 µm), ultra-fine grain (average diameter <1 µm), sometimes nano grains (<100 nm in size) can be obtained through ARB (Toroghinejad et al 2013;Milner et al 2013;Shaarbaf and Toroghinejad 2008). …”

Section: Grain Size Factormentioning

confidence: 99%

“…With the help of this process 80-nm grain can be produced with AA5083 (Toroghinejad et al 2013). Milner et al (2013) reached to the conclusion of transformation of micro-size of commercially pure Ti to the average grain size of 100 nm after seven cycle of processing at 450°C. Ultra-fine-grained 3003 alloy having mean grain size of 700-800 nm can be produced by ARB at 250°C (Xing et al 2002).…”

Section: Introductionmentioning

confidence: 99%

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Solid-State Joining by Roll Bonding and Accumulative Roll Bonding

Sardar

Mandal

Pal

et al. 2015

Advances in Material Forming and Joining

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This chapter is intended to present the basic concept of roll bonding (RB) and accumulative roll bonding (ARB) of light-weight ductile metals. For this purpose, a discussion on previous research works on RB and ARB has been incorporated in this chapter. The general mechanisms of joining after rolling and several applications of RB and ARB have also been discussed. In the present study, an investigation on influence of various parameters on joint strength was conducted. Preheat temperature and percentages of thickness reduction are found to influence joint strength in a significant manner. The influence of annealing temperature and annealing time on mechanical properties of roll-bonded products in terms of controlling parameters has also been discussed here. The significant influence of preheat temperature and corresponding thickness reduction on the bond strength has been thoroughly discussed with a mechanism of peel testing. An attempt has been made to establish the mechanism behind failure along the joining line during peel testing of bond strength of solid-state welding through rolling.

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“…Furthermore, the volume of equiaxed grains went an upward trend with the increase of strain and arrived at 90% after eight cycles. Milner et al [37] hot rolled CPTi 7 cycles by ARB at 450 and a predominantly-equiaxed ultrafine grain structure with an average grain size of 100 nm was finally formed. The tensile strength doubled of UFG alloy as the initial one, from 450 to 900 MPa.…”

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confidence: 99%

The Ultrafine-Grained Titanium and Biomedical Titanium Alloys Processed by Severe Plastic Deformation (SPD)

Lin¹,

Wang²,

Yeung³

et al. 2013

SOJ Mater Sci Eng

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the function of our tissues and organs. Among the biomedical materials, titanium alloys have received attractions for dental and orthopedic implants due to their high strength, great corrosion resistance and biocompatibility, and low density [1,2]. Recently, a series of new β titanium alloys have been developed with low elastic modulus, containing non-toxic alloying elements such as Nb, Ta, Zr and Mo in order to tackle the stress shielding effect caused by stiffness mismatch between implants and bones [3][4][5][6].Several literatures [7][8][9] have reported that compared with traditional titanium alloys, the ultrafine-grained (UFG) biomedical titanium alloys possess higher strength, better corrosion resistance and fatigue performance. Moreover, the ultrafine-grained biomedical titanium alloys, which are usually used for orthopedic and dental implants, can induce in-growth of bone tissues, increase the interfacial strength and accelerate the repair process. An effective technique to introduce the ultrafinegrained structure is called the Severe Plastic Deformation (SPD).The Severe Plastic Deformation (SPD) results in significant grain refinement by imposing high plastic strains on metallic materials. For two decades, several SPD methods, such as equal channel angular pressing (ECAP) [10,11], high pressure torsion (HPT) [12,13], accumulative roll bonding (ARB) [14,15] and friction stir processing (FSP) [16,17], have been developed to produce the ultrafine-grained materials. This paper examines recent developments related to fabricating ultrafine-grained biomedical titanium alloys by SPD methods. More specifically, the mechanical properties and performances of biomedical titanium alloys processed by ECAP, HPT, ARB and FSP have been investigated. Techniques for SPD Methods Equal channel angular pressing (ECAP)The ECAP method is the most developed SPD techniques at IntroductionThe ultrafine-grained titanium and biomedical titanium alloys processed by Severe Plastic Deformation (SPD)It's well known that biomedical metal materials are widely employed in a various kinds of implants, devices and process equipment that contacts biological systems, which improve AbstractThe ultrafine-grained materials processed by severe plastic deformation (SPD) can be tailored to achieve superior properties and performances. Recently, the SPD methods, emerging as an effective way to grain refinement, have become attractive for fabrication of the ultrafine-grained biomedical materials, which can be adjusted to possess both favorable mechanical properties and excellent biocompatibility. Biomedical titanium alloys have become one of the most promising biomedical metallic materials, due to their high strength, low density, good biocompatibility and excellent corrosion resistance. Compared with traditional titanium alloys, the ultrafine-grained biomedical titanium alloys possess higher strength, better corrosion resistance and fatigue performance. Moreover, the ultrafine-grained biomedical titanium alloys, which are usually used for orthopedic...

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Grain Refinement and Mechanical Properties of CP‐Ti Processed by Warm Accumulative Roll Bonding

Cited by 10 publications

References 24 publications

The Effect of Warm Accumulative Roll Bonding and Post Process Treatment on Microstructure and Mechanical Behavior of CP-Ti

The Effect of Warm Accumulative Roll Bonding and Post Process Treatment on Microstructure and Mechanical Behavior of CP-Ti

Solid-State Joining by Roll Bonding and Accumulative Roll Bonding

The Ultrafine-Grained Titanium and Biomedical Titanium Alloys Processed by Severe Plastic Deformation (SPD)

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