Microstructures and mechanical deformation behaviors of ultrafine-grained commercial pure (grade 3) Ti processed by two-step severe plastic deformation

Fan, Zhiguo; Jiang, Hong; Sun, Xiaogang; Song, Jie; Zhang, Xiaoning; Xie, Chi

doi:10.1016/j.msea.2009.07.030

Cited by 57 publications

(35 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, the low strength of pure Ti tends to significantly reduce the potential applications. Through the introduction of severe plastic deformation (SPD) techniques, and combinations of SPD with other traditional deformation procedures, it is possible to fabricate ultrafine-grained (UFG) and nanocrystalline (NC) Ti which shows excellent properties including enhanced strength and good ductility [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Temperature and strain rate dependence of microstructural evolution and dynamic mechanical behavior in nanocrystalline Ti

Zhang

Wang

Zhilyaev

et al. 2015

Materials Science and Engineering: A

View full text Add to dashboard Cite

The mechanical behavior of commercial purity titanium with a nanocrystalline (NC) grain size was investigated using split Hopkinson pressure bar tests at high strain rates and over a range of temperatures. The study was accompanied by detailed microstructural investigations before and after compression testing. The results show that rotary dynamic recrystallization operates during compressive deformation at strain rates of ~3000 and ~4500 s -1 at temperatures from 298 to 573 K but cells form at 673 K. The dynamic mechanical behavior of NC Ti shows a strong dependence on temperature and strain rate such that the flow stress and the strain hardening rate both increase with increasing strain and decreasing temperature. A constitutive equation is derived to relate the flow stress to the temperature, strain rate and true strain and to predict the yield strength and the peak stress of NC Ti subjected to dynamic deformation at elevated temperatures.

show abstract

Section: Introductionmentioning

confidence: 99%

Temperature and strain rate dependence of microstructural evolution and dynamic mechanical behavior in nanocrystalline Ti

Zhang

Wang

Zhilyaev

et al. 2015

Materials Science and Engineering: A

View full text Add to dashboard Cite

show abstract

“…Another study focused on the critical parameters of ECAE processing as a practical method for grain refinement [2]. Fan et al [3] processed titanium using two-step SPD, consisting of eight passes of ECAE and cold rolling at room and liquid nitrogen temperature. Subsequent cold rolling of ECAE processed specimens led to further refinement of the microstructure, leading to strength levels higher than those of Ti-6Al-4V [4].…”

Section: Introductionmentioning

confidence: 99%

High Temperature Flow Response Modeling of Ultra-Fine Grained Titanium

Sajadifar

Yapıcı

2015

Metals

View full text Add to dashboard Cite

This work presents the mechanical behavior modeling of commercial purity titanium subjected to severe plastic deformation (SPD) during post-SPD compression, at temperatures of 600-900 °C and at strain rates of 0.001-0.1 s −1. The flow response of the ultra-fine grained microstructure is modeled using the modified Johnson-Cook model as a predictive tool, aiding high temperature forming applications. It was seen that the model was satisfactory at all deformation conditions except for the deformation temperature of 600 °C. In order to improve the predictive capability, the model was extended with a corrective term for predictions at temperatures below 700 °C. The accuracy of the model was displayed with reasonable agreement, resulting in error levels of less than 5% at all deformation temperatures.

show abstract

“…For the past decade or so, the interest in the application of severe plastic deformation (SPD) techniques to manufacture nanostructured Ti has been motivated by several factors [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. First, the reports on the formation of an ultrafine-grained structure from SPD processing and its influence on the mechanical behavior have led to interesting fundamental questions [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…First, the reports on the formation of an ultrafine-grained structure from SPD processing and its influence on the mechanical behavior have led to interesting fundamental questions [1][2][3][4][5][6][7][8][9][10][11][12][13]. Second, the published studies suggest that nanostructuring of Ti and its alloys can result in significant enhancements in strength, ductility and fatigue life [10,14], which provide a pathway to the structural and medical applications.…”

Section: Introductionmentioning

confidence: 99%

“…Grain refinement in commercially pure Ti by various SPD methods typically leads to ultrafine grain (UFG) structures with an average grain size in the range of 100-600 nm [3][4][5][6][12][13][14][15]. However, it has been reported that the consolidation of the metal powders via SPD methods can be implemented to prepare high-density samples with grain sizes that are smaller than 50 nm [16,17].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanocrystalline Ti Produced by Cryomilling and Consolidation by Severe Plastic Deformation

Semenova

Timokhina

Исламгалиев

et al. 2015

Metals

View full text Add to dashboard Cite

Abstract:We report on a study of the nanocrystalline structure in Ti, which was produced by cryogenic milling followed by subsequent consolidation via severe plastic deformation using high pressure torsion. The mechanisms that are believed to be responsible for the formation of grains smaller than 40 nm are discussed and the influence of structural characteristics, such as nanometric grains and oxide nanoparticles, on Ti hardening is established.

show abstract

Microstructures and mechanical deformation behaviors of ultrafine-grained commercial pure (grade 3) Ti processed by two-step severe plastic deformation

Cited by 57 publications

References 25 publications

Temperature and strain rate dependence of microstructural evolution and dynamic mechanical behavior in nanocrystalline Ti

Temperature and strain rate dependence of microstructural evolution and dynamic mechanical behavior in nanocrystalline Ti

High Temperature Flow Response Modeling of Ultra-Fine Grained Titanium

Nanocrystalline Ti Produced by Cryomilling and Consolidation by Severe Plastic Deformation

Contact Info

Product

Resources

About