Strain rate effects on the mechanical behavior of porous titanium with different pore sizes

Jing, Zhao; Xie, Z.L.; Tao, Zhong; Sun, Tao; Fezzaa, Kamel; Cai, Y.; Huang, J.Y.; Luo, Sheng‐Nian

doi:10.1016/j.msea.2021.141593

Cited by 15 publications

(3 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This meant that the crushing history of the Ti-75%AC specimens was similar to the process of crushing cellular materials, during which the axial compression produced almost no lateral spreading; therefore, no clear barreling effect was noticed. However, according to [24], the lateral spreading of the porous Ti was greater during dynamic crushing compared to quasi-static because the mean Poisson's ratio under dynamic loading was higher due to the more uniform deformation of the specimen. The presentation of the results, illustrating the mechanical behavior of the porous titanium specimens under impact conditions, began with a set of selected video frames collected in Figure 8.…”

Section: Dynamic Impact Compression Testsmentioning

confidence: 99%

Mechanical Energy Absorption Ability of Titanium-Based Porous Structures Produced by Various Powder Metallurgy Approaches

et al. 2023

View full text Add to dashboard Cite

Porous materials are very efficient in absorbing mechanical energy, for instance, in combined armor, in order to improve the anti-ballistic protection characteristics. In the present study, porous titanium-based structures were manufactured via three different powder metallurgy methods using titanium hydride (TiH2) powder, which provided activated sintering, owing to dehydrogenation. The emission of hydrogen and shrinkage of powder particles on dehydrogenation also added an additional potential to control the sintering process and create desirable porosities. TiH2 powder was sintered with additions of NaCl or ammonium carbide as pore holding removable agents, while highly porous Ti-Al structures were formed via liquid phase reactive sintering of TiH2 and Al powders. The microstructures and porosities of sintered dehydrogenated titanium and Ti-Al structures were comparatively studied. Mechanical characteristics were evaluated using compression testing with strain rates varying from quasi-static to high levels. The resonant frequency method was also employed to determine damping parameters and elastic modulus of these materials. All testing methods were aimed at characterizing the energy-absorbing ability of the obtained porous structures. The desired strength, plasticity and energy-absorbing characteristics of porous titanium-based structures were assessed, and the possibilities of their application were also discussed. Based on the obtained results, it was found that porous titanium materials produced with the use of ammonium carbonate showed promising energy absorption properties.

show abstract

Section: Dynamic Impact Compression Testsmentioning

confidence: 99%

Mechanical Energy Absorption Ability of Titanium-Based Porous Structures Produced by Various Powder Metallurgy Approaches

et al. 2023

View full text Add to dashboard Cite

show abstract

“…This method allows to manufacture titanium alloys with a high homogeneity and density due to the use of titanium hydride (TiH2) as one of the components in the starting powder mixture [7][8][9]. It should be noted that titanium alloys manufactured by powder metallurgy are characterized by residual porosity, which usually negatively effects the performances, in particular, corrosion resistance [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Features of Microstructural Evolution and Corrosion Behavior of Ti6Al4V Titanium Alloy Fabricated from Elemental Powder Blends

Lavrys,

Pohrelyuk,

Savvakin

et al. 2024

KEM

View full text Add to dashboard Cite

Sintered Ti6Al4V titanium alloys prepared from TiH2/60Al40V powder blends under various technological conditions were studied. The microstructural evolution was investigated by X-ray diffraction, scanning electron microscopy, optical microscopy, and energy dispersive X-ray analysis. The corrosion resistance of sintered titanium alloy was evaluated by the static immersion test in 40 wt.% H2SO4 acid, according to ASTM standard G31-72(2004). Depending on powder metallurgy processing parameters (compaction pressure or sintering temperature), the Ti6Al4V alloy was obtained with various structural features (porosity and structural heterogeneity). It was shown that those structural features of sintered Ti6Al4V titanium alloy are a key microstructural factor that determines their corrosion resistance. For instance, an increase in porosity leads to enhanced corrosion resistance. Based on the current research, the optimal manufacturing regimes of powder metallurgy of Ti6Al4V titanium alloy ensure the achievement of characteristics sufficient for practical use in aggressive conditions of the chemical industry were obtained.

show abstract

“…However, they emphasized that high strain rates are not expected during the early stages of medical treatment; instead, they often occur after treatment. On the other hand, the geometrical features of implants, such as pore size and distribution, surface roughness, and number and configuration of implant screws, are design requirements that can prevent crack formation at high strain rate conditions during the production process [21][22][23][24][25] . Additionally, low strain rates can also pose challenges for therapeutic medical implants.…”

mentioning

confidence: 99%

Strain-rate-dependent plasticity of Ta-Cu nanocomposites for therapeutic implants

Kardani,

Montazeri,

Urbassek

2023

Sci Rep

View full text Add to dashboard Cite

Recently, Ta/Cu nanocomposites have been widely used in therapeutic medical devices due to their excellent bioactivity and biocompatibility, antimicrobial property, and outstanding corrosion and wear resistance. Since mechanical yielding and any other deformation in the patient's body during treatment are unacceptable in medicine, the characterization of the mechanical behavior of these nanomaterials is of great importance. We focus on the microstructural evolution of Ta/Cu nanocomposite samples under uniaxial tensile loading conditions at different strain rates using a series of molecular dynamics simulations and compare to the reference case of pure Ta. The results show that the increase in dislocation density at lower strain rates leads to the significant weakening of the mechanical properties. The strain rate-dependent plastic deformation mechanism of the samples can be divided into three main categories: phase transitions at the extreme strain rates, dislocation slip/twinning at lower strain rates for coarse-grained samples, and grain-boundary based activities for the finer-grained samples. Finally, we demonstrate that the load transfer from the Ta matrix to the Cu nanoparticles via the interfacial region can significantly affect the plastic deformation of the matrix in all nanocomposite samples. These results will prove useful for the design of therapeutic implants based on Ta/Cu nanocomposites.

show abstract

Strain rate effects on the mechanical behavior of porous titanium with different pore sizes

Cited by 15 publications

References 55 publications

Mechanical Energy Absorption Ability of Titanium-Based Porous Structures Produced by Various Powder Metallurgy Approaches

Mechanical Energy Absorption Ability of Titanium-Based Porous Structures Produced by Various Powder Metallurgy Approaches

Features of Microstructural Evolution and Corrosion Behavior of Ti6Al4V Titanium Alloy Fabricated from Elemental Powder Blends

Strain-rate-dependent plasticity of Ta-Cu nanocomposites for therapeutic implants

Contact Info

Product

Resources

About