Texture evolution and mechanical behavior of commercially pure Ti processed via pulsed electric current treatment

Chao, Yang; Lin, Jian-An; Ding, Yi; Zhang, W. W.; Li, Y. Y.; Fu, Zhiqiang; Fei, Chen; Lavernia, Enrique J.

doi:10.1007/s10853-016-0282-0

Cited by 19 publications

(4 citation statements)

References 45 publications

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“…Therefore, the decreased grain size with the increasing PEC intensity can be attributed to an acceleration of nucleation and the suppression of grain growth during the allotropic transformation bcc fi fcc of the as-treated specimens, which results from the coupled influence of PEC thermal and athermal effects. [29] Two different phenomena exist for the as-treated pure-iron specimens compared with the PEC-treated pure titanium under similar treatment conditions, [15] i.e., their allotropic transformation temperatures are exceeded. The change in grain size with the increasing PEC intensity is inversely correlated to that for PEC-treated pure titanium.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, pulsed-electric-current (PEC) treatment was proposed as an effective method to improve the mechanical properties of polycrystalline metals given its ability to yield tailored microstructures (grain size and morphology). [13] As one of the PEC treatment methods, spark-plasma-sintering, which couples an electric field that is induced by a PEC and thus a temperature field, with a pressure field, [14] can be applied to treat polycrystalline metals, and thus tailor texture and improve plasticity, [15] except for its common application to consolidate powder particles and to achieve high-performance bulk materials. [16][17][18] The underlying PEC mechanism is thought to be an accelerated nucleation of a crystallize phase and a suppression of grain growth under the coupled influence of thermal (temperature field) and athermal (facilitated atomic diffusion) effects.…”

Section: Introductionmentioning

confidence: 99%

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Tailoring Grain Boundary and Resultant Plasticity of Pure Iron by Pulsed-Electric-Current Treatment

Chao

Zhao

Wang

et al. 2018

Metall Mater Trans A

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In general, annealing twins (R3 boundaries) are induced in face-centered cubic metals by thermal-mechanical processes. We report on the R3 boundary-induced plasticity enhancement of pure iron treated by a pulsed electric current subject to its allotropic transformation of a fi c fi a. The behavior is attributed to an increased amount of R3 boundaries with the grain-boundary interconnection evolution from {112}/{112} to {110}/{110} resulting from the increasing pulsed-electric-current intensity. The results provide an alternative pathway to fabricate high-performance metallic materials by tailoring special grain boundaries.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tailoring Grain Boundary and Resultant Plasticity of Pure Iron by Pulsed-Electric-Current Treatment

Chao

Zhao

Wang

et al. 2018

Metall Mater Trans A

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“…[27,28] This approach is especially attractive for high strength structural [28] and-in the case of titanium alloys-for biomedical applications. [29] From a scientific point of view, the highly accurate control of all process parameters enables to study densification mechanisms in the presence of electric fields [30][31][32][33][34] and identify main processing factors required for tuning grain boundaries, [35,36] texture, [37] porosity, [38] and other functional properties. For a more detailed discussion of the big potential of FAST/SPS techniques for material synthesis and microstructure tuning, we refer to excellent textbooks summarizing the current state of the art.…”

Section: Application Of Fast/sps For Synthesis Of High-performing Matmentioning

confidence: 99%

Application of Electric Current‐Assisted Sintering Techniques for the Processing of Advanced Materials

et al. 2020

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Highly efficient energy conversion and storage technologies such as high‐temperature solid oxide fuel and electrolysis cells, all‐solid‐state batteries, gas separation membranes, and thermal barrier coatings for advanced turbine systems depend on advanced materials. In all cases, processing of ceramics and metals starting from powders plays a key role and is often a challenging task. Depending on their composition, such powder materials often require high sintering temperatures and show an inherent risk of abnormal grain growth, evaporation, chemical reaction, or decomposition, especially in the case of long dwelling times. Electric current‐assisted sintering (ECAS) techniques are promising to overcome these restrictions, but a lot of fundamental and practical challenges must be solved properly to take full advantage of these techniques. A broad and long‐term expertise in the field of ECAS techniques and comprehensive facilities including conventional field‐assisted sintering technology/spark plasma sintering (FAST/SPS), hybrid FAST/SPS (with additional heater), sinter forging, and flash sintering (FS) devices are available at the Institute of Energy and Climate Research: Materials Synthesis and Processing (IEK‐1). Herein, main advantages and challenges of these techniques are discussed and the concept to overcome current limitations is introduced on selected examples.

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“…Titanium alloys are used as structural materials for components such as aircraft engines because these alloys show excellent specific strength. The mechanical properties of titanium alloys can be enhanced using several methods such as grain refining 1,2) and solid solution hardening (especially using oxygen). 3) For instance, Ti6Al4V is a titanium alloy with superior mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Change in Slip Mode with Temperature in Ti–0.49 mass%O

et al. 2019

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The temperature dependence of 0.2% proof stress was investigated in Ti0.49 mass%O with an ¡ single phase. The 0.2% proof stress decreased as the temperature increased from 77 to 573 K. The athermal stress, which was defined as the average of the stress values for which the temperature dependence was absent above 573 K, was found to be 70 MPa. The temperature dependence of the effective stress indicates that the temperature dependence of the effective stress changed at around 400 K. To study the thermally activated process that controls the yielding in Ti, the temperature dependence of the activation volume was also measured. An inverse temperature dependence of the activation volume was found at between 325 and 400 K, suggesting that the thermally activated process of dislocation glide changed at this temperature. Prismatic slip with ©aª dislocations was dominant at low temperatures, whereas other slips were activated at high temperatures. The activation enthalpy for the dislocation glide was also measured between 77 and 573 K.

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Texture evolution and mechanical behavior of commercially pure Ti processed via pulsed electric current treatment

Cited by 19 publications

References 45 publications

Tailoring Grain Boundary and Resultant Plasticity of Pure Iron by Pulsed-Electric-Current Treatment

Tailoring Grain Boundary and Resultant Plasticity of Pure Iron by Pulsed-Electric-Current Treatment

Application of Electric Current‐Assisted Sintering Techniques for the Processing of Advanced Materials

Change in Slip Mode with Temperature in Ti–0.49 mass%O

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