scholarly journals Phase Composition, Nanohardness and Young’s Modulus in Ti-Fe Alloys after Heat Treatment and High Pressure Torsion

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1657
Author(s):  
Alena S. Gornakova ◽  
Boris B. Straumal ◽  
Andrey A. Mazilkin ◽  
Natalia S. Afonikova ◽  
Mikhail I. Karpov ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Composition ◽  
Young’S Modulus ◽  
High Pressure Torsion ◽  
Young's Modulus ◽  
Large Fraction ◽  
Phase Changes ◽  
High Iron Content ◽  
Preliminary Annealing ◽  
Before And After

Four titanium-iron binary alloys were studied. They were preliminarily annealed in the (α + b) and (α + TiFe) regions of the Ti-Fe phase diagram. The changes in the phase composition, nanohardness, and Young’s modulus of the annealed alloys before and after high pressure torsion (HPT) were investigated. Alloys with high iron content after HPT contain a large fraction of the ω phase. The nanohardness of the material in the middle of the radius of the HPT samples varies in the same range of values between 4.4 and 5.8 GPa, regardless of the preliminary annealing. Young’s modulus is a parameter sensitive to structural and phase changes in the material. After HPT, it increases by a factor of 1.5 after preliminary annealing in the (α + b) region in comparison with that in (α + TiFe) region.

Influence of B4C, SiC and Si3N4 Additions on Microstructures and Selected Properties of Titanium Nitride Matrix Materials Obtained by HPHT Method

2014 ◽  
Vol 89 ◽  
pp. 109-114
Author(s):  
Jolanta Cyboroń ◽  
Piotr Klimczyk ◽  
Pawel Figiel ◽  
Małgorzata Karolus
Keyword(s):  
Fracture Toughness ◽  
High Pressure ◽  
Phase Composition ◽  
High Temperature ◽  
Titanium Nitride ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Physical And Mechanical Properties ◽  
Ceramic Phase ◽  
Ultra High Temperature Ceramics

The paper presents the results of the High Pressure and High Temperature (HP-HT) sintering and investigation of Ultra High Temperature Ceramics (UHTC) composites of titanium nitride matrix. The aim of this studies were to determine the influence of additives on the ceramic phase composition, microstructure and selected properties. Three different kind of mixtures were prepared. 8 to 22 wt% B4C, SiC and Si3N4were added. Composites were sintered under high-pressure high-temperature conditions (HP-HT) using a Bridgman-type apparatus under pressure about 6 GPa. Materials were sintered at the range of 1450 to 1690 ° C, duration of sintering was 60s. The phase composition, microstructure, and the apparent density, Young's modulus, hardness and fracture toughness KIC (HV), using the Vickers indentation method were examined. Sintered titanium nitride with the 22 wt% silicon carbide participation was characterized the best physical and mechanical properties. For this material the relative density is 99%, the Young's modulus 435 GPa, Vickers hardness 18.3 GPa HV1 and fracture toughness 5.5 MPa∙m1/2.

scholarly journals Microstructure, phase composition and hardness evolution in 316L stainless steel processed by high-pressure torsion

2016 ◽  
Vol 657 ◽  
pp. 215-223 ◽  
Author(s):  
Jenő Gubicza ◽  
Moustafa El-Tahawy ◽  
Yi Huang ◽  
Hyelim Choi ◽  
Heeman Choe ◽  
...  
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
Phase Composition ◽  
316L Stainless Steel ◽  
High Pressure Torsion

Effect of Deformation by High Pressure Torsion on the Phase Composition and Microhardness of Mechanically Alloyed and Rapidly Quenched Al–Fe Alloys

2003 ◽  
Vol 216-217 ◽  
pp. 313-322 ◽  
Author(s):  
Victor V. Tcherdyntsev ◽  
S.D. Kaloshkin ◽  
E.A. Afonina ◽  
I.A. Tomilin ◽  
Yu.V. Baldokhin ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Composition ◽  
High Pressure Torsion ◽  
Mechanically Alloyed ◽  
Fe Alloys

Effect of the Quenching Temperature on the Phase Composition and Youngʹs Modulus of Corrosion-Resistant and Biocompatible Titanium Alloys

2019 ◽  
Vol 946 ◽  
pp. 309-314 ◽  
Author(s):  
Anatoly G. Illarionov ◽  
S.V. Grib ◽  
A.V. Huppeev
Keyword(s):  
Phase Composition ◽  
Titanium Alloys ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Two Phase ◽  
Quenching Temperature ◽  
Thermo Calc Software ◽  
Extreme Change ◽  
The Relationship ◽  
Micro Indentation

The relationship between the phase composition and the Young’s modulus in quenched PT-7M, Ti-6Al-7Nb, BT16 titanium alloys has been studied using the structural analysis, thermodynamic calculations in the Thermo-Calc software and micro-indentation. It is found that the nature of the change in the Young’s modulus in the investigated titanium alloys after quenching from the two-phase α+β-region depends on the chemical composition of the alloy, which determines the nature of the observed metastable phases (α', α", ω, β). The correlation between the extreme change in the Young’s modulus from the quenching temperature and the so-called interatomic bonding force (Fb) calculated from the electronic structure parameters of the α, α', β phases was shown for the Ti-6Al-7Nb alloy. The relationship between the limits of the Young’s modulus of the investigated alloys during quenching with the level of their alloying with α-and β-stabilizers is shown.

scholarly journals Comparative investigations of in vitro and in vivo bioactivity of titanium vs. Ti–24Nb–4Zr–8Sn alloy before and after sandblasting and acid etching

RSC Advances ◽  
2020 ◽  
Vol 10 (40) ◽  
pp. 23582-23591
Author(s):  
Xin Liu ◽  
Yumei Niu ◽  
Weili Xie ◽  
Daqing Wei ◽  
Qing Du
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Stress Shielding ◽  
Acid Etching ◽  
Implant Material ◽  
Before And After ◽  
New Type

To avoid the failure of clinical surgery due to “stress shielding” and the loosening of an implant, a new type of alloy, Ti–24Nb–4Zr–8Sn (TNZS), with a low Young's modulus acted as a new implant material in this work.

scholarly journals Comparison of Riboflavin/Ultraviolet-A Cross-Linking in Porcine, Rabbit, and Human Sclera

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Yali Zhang ◽  
Zhiwei Li ◽  
Lei Liu ◽  
Xuguang Han ◽  
Xiaomin Zhao ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Biomechanical Testing ◽  
Biomechanical Properties ◽  
Ultimate Stress ◽  
Cross Linking ◽  
Ultraviolet A ◽  
Rabbit Eye ◽  
Before And After ◽  
Biomechanical Parameters

Purpose. To compare the biomechanical properties of porcine, rabbit, and human sclera before and after riboflavin/ultraviolet-A (UVA) collagen cross-linking (CXL).Methods. Eight rabbits, 8 porcine eyeballs, and 8 human eyeballs were included. One rabbit eye and half of each bisected human and porcine eyeball were treated with riboflavin/UVA CXL. Untreated fellow rabbit eyes and eyeball halves served as controls. A 10 mm × 20 mm scleral band was harvested from each specimen. From this band, two 3.5 mm × 15.0 mm strips were prepared for biomechanical testing. The biomechanical parameters were ultimate stress, stress and Young’s modulus.Results. Values of stress, and Young’s modulus showed that human sclera was 4 times stiffer than porcine sclera and 3 times stiffer than rabbit sclera. In rabbit sclera, both the stress and Young’s modulus were significantly increased by CXL (P<0.05). In porcine sclera, only the ultimate stress was significantly increased by CXL (P<0.05). The biomechanical properties of human sclera were not statistically affected by CXL (P>0.05).Conclusions. Human sclera has higher biomechanical stiffness than porcine and rabbit sclera. With the same irradiation dose, riboflavin/UVA CXL increases the biomechanical stiffness of rabbit sclera but not porcine or human sclera.

scholarly journals Structure, phase composition, and microhardness of carbon steels after high-pressure torsion

2008 ◽  
Vol 43 (11) ◽  
pp. 3800-3805 ◽  
Author(s):  
Andrei A. Mazilkin ◽  
Boris B. Straumal ◽  
Svetlana G. Protasova ◽  
Sergei V. Dobatkin ◽  
Brigitte Baretzky
Keyword(s):  
High Pressure ◽  
Phase Composition ◽  
High Pressure Torsion ◽  
Carbon Steels ◽  
Structure Phase

scholarly journals Correlations of Geometry and Infill Degree of Extrusion Additively Manufactured 316L Stainless Steel Components

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5173
Author(s):  
Tobias Rosnitschek ◽  
Andressa Seefeldt ◽  
Bettina Alber-Laukant ◽  
Thomas Neumeyer ◽  
Volker Altstädt ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Product Development ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Dimensional Accuracy ◽  
Product Development Process ◽  
Stainless Steel 316L ◽  
Before And After ◽  
Metal Extrusion

This study focuses on the effect of part geometry and infill degrees on effective mechanical properties of extrusion additively manufactured stainless steel 316L parts produced with BASF’s Ultrafuse 316LX filament. Knowledge about correlations between infill degrees, mechanical properties and dimensional deviations are essential to enhance the part performance and further establish efficient methods for the product development for lightweight metal engineering applications. To investigate the effective Young’s modulus, yield strength and bending stress, standard testing methods for tensile testing and bending testing were used. For evaluating the dimensional accuracy, the tensile and bending specimens were measured before and after sintering to analyze anisotropic shrinkage effects and dimensional deviations linked to the infill structure. The results showed that dimensions larger than 10 mm have minor geometrical deviations and that the effective Young’s modulus varied in the range of 176%. These findings provide a more profound understanding of the process and its capabilities and enhance the product development process for metal extrusion-based additive manufacturing.

scholarly journals Slippage during high-pressure torsion of commercially pure titanium and application of accumulative HPT to it

2022 ◽  
Vol 1213 (1) ◽  
pp. 012003
Author(s):  
D V Gunderov ◽  
A A Churakova ◽  
A V Sharafutdinov ◽  
V D Sitdikov ◽  
V V Astanin
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Pure Titanium ◽  
Phase Changes ◽  
Phase Content ◽  
Commercially Pure Titanium ◽  
Micro Hardness ◽  
Ω Phase ◽  
Commercially Pure ◽  
First Time

Abstract A new efficient method was used to find that in the case of high-pressure torsion of commercially pure titanium, accumulation of shear strain in Ti does not occur due to slippage of anvils. Despite this, micro-hardness increases as the number of turns n increases, and Ti structure is refined more intensively. High-pressure torsion is accompanied by a high-pressure ω-phase formation. However, the content of ω-phase changes non-monotonously with an increase in the number of turns. First, while number of turns is less than n=5, the ω-phase content reaches 50%. Upon further deformation, the ω-phase content decreases to 15% for n=20. A new accumulative high-pressure torsion method is applied to commercially pure titanium for the first time. Accumulative high-pressure torsion leads to the strongest transformation of the structure and an increase in hardness, since stronger real deformation occurs due to composition of compression and torsion strain cycles.

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