Research on mechanical response of Ti6321 titanium alloy after shocked by light gas gun

2021 ◽  
pp. 131483
Author(s):  
Zhiwei Yan ◽  
Zhe Zhou ◽  
Lin Wang ◽  
Xuefeng Xu
Keyword(s):  
Titanium Alloy ◽  
Mechanical Response ◽  
Gas Gun

Effect of grain boundaries on local mechanical response in β type titanium alloy

2020 ◽  
Vol 2020.28 (0) ◽  
pp. 416
Author(s):  
Naoki ISHIZAKI ◽  
Kazuya NUMATA ◽  
Shuki YONEMURA ◽  
Shigeru KURAMOTO ◽  
Eri NAKAGAWA ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Grain Boundaries ◽  
Mechanical Response

Local Mechanical Response of Cold Worked Beta-Type Titanium Alloy

2018 ◽  
Vol 2018.26 (0) ◽  
pp. 405
Author(s):  
Kazuya NUMATA ◽  
Kimura TAKUYA ◽  
Shigeru KURAMOTO ◽  
Eri NAKAGAWA ◽  
Takahito OHMURA
Keyword(s):  
Titanium Alloy ◽  
Mechanical Response ◽  
Cold Worked

Mechanical Response of Ti-6Al-4V Alloy on Deformation at Moderate Temperatures

2013 ◽  
Vol 549 ◽  
pp. 311-316 ◽  
Author(s):  
Marion Merklein ◽  
Hinnerk Hagenah ◽  
Markus Kaupper ◽  
Adam Schaub
Keyword(s):  
Titanium Alloy ◽  
Elevated Temperatures ◽  
Mechanical Response ◽  
Material Behavior ◽  
High Yield ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Forming Process ◽  
Element Analysis ◽  
Specific Strength

Due to beneficial characteristics such as high specific strength, corrosion resistance and biocompatibility Ti-6Al-4V alloy has become the most important industrially produced titanium alloy during the last decades. Commonly used for aerospace technology and medical products, nowadays Ti-6Al-4V covers 50% of the worldwide produced titanium alloy parts. Different deformation operations as forging and casting as well as machining are used to shape titanium alloy components. For sheet metals, cost and time of fabrication can be reduced significantly via the near net shape technology sheet metal forming. Materials such as the α + β alloy Ti-6Al-4V with high yield stress and comparatively low elastic modules need to be formed at elevated temperatures to increase their formability. Numerical simulations are applied to calculate the forming behavior during the process and conclude the characteristics of the shaped part. Therefore in this paper the mechanical behavior of this titanium alloy is investigated by uniaxial tensile test within elevated temperatures ranging from 250 to 500 °C. Finally, the experimental results are adapted to models which predict the flow response in order to describe material behavior in finite element analysis of the forming process.

Microstructure and Texture in an Alpha/Beta Titanium Alloy and their Impact on Mechanical Response

2007 ◽  
Vol 539-543 ◽  
pp. 3589-3594
Author(s):  
W.J. Evans ◽  
F.R. Eng
Keyword(s):  
Titanium Alloy ◽  
Strain Rate ◽  
Titanium Alloys ◽  
Plane Strain ◽  
Basal Plane ◽  
Mechanical Response ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Strain And Strain Rate ◽  
Alpha Beta

The paper explores texture in the titanium alloys Ti-6-4 and Ti 550. It illustrates how texture evolves under plane strain compression in Ti-6-4. This evolution is dependent on temperature, degree of reduction (strain) and strain rate. Rolled (Ti-6-4) and forged (Ti 550) variants with different textures are then examined under tension and torsion loading in relation to their monotonic and fatigue response. Correlation of the observations with regard to orientation of the basal plane is demonstrated.

scholarly journals Modeling the Mechanical Response of Auxetic Metamaterials to Dynamic Effects

2021 ◽  
pp. 144-152
Author(s):  
V. V Skripnyak ◽  
M. O Chirkov ◽  
V. A Skripnyak
Keyword(s):  
Titanium Alloy ◽  
Strain Rate ◽  
Mechanical Behavior ◽  
Relative Density ◽  
Dynamic Loading ◽  
Uniaxial Compression ◽  
Mechanical Response ◽  
Effective Strain ◽  
Absorbed Energy ◽  
Auxetic Structure

The paper investigates the mechanical response of a 3D auxetic structure created on the basis of a unit cell with pre-buckled structural elements to dynamic loading. The aim of the work is to study deformations of the auxetic structure made of an alpha titanium alloy during uniaxial compression at 100 m/s, to evaluate dissipative properties of the structure during high-speed deformation, and to estimate the characteristic time of the metamaterial’s compaction with a relative density of 0.0115. The numerical simulation of the metamaterial at effective strain rate of 2000 1/s has been performed using LS DYNA solver. To describe the mechanical behavior of the titanium alloy in frame elements, we use a model of an elastic-plastic damaged medium, which takes into account the strain rate sensitivity of the plastic flow, temperature changes due to dissipative effects, and the effect of the stress state triaxiality parameter on nucleation and growth of structural damages. The numerical studies have shown that the auxetic effect in the studied metamaterial is retained under high-rate elastoplastic deformation. At a speed of the uniaxial compression of 100 m/s, deformation in the volume of the metamaterial proceeds nonuniformly. Under dynamic loading of the considered auxetic metamaterial, the deformation and fracture modes depend not only on the parameters of the cell geometry, but also on the mechanical behavior of the framework material, as well as on the relative density. This makes it possible to control the deformations of the cells under mechanical stress. Layers of compacted cells are formed near the dynamic loading surface. The instability of the cells of the auxetic metamaterials increases the absorbed energy. The calculated value of the specific absorbed energy under dynamic uniaxial compression reaches 3.4 kJ/kg, and is comparable with the values for frame structures made of Ti-6Al-4V with an equivalent specific mass density. The results indicate the possibility of creating protective structures using auxetic cellular structures on the base of the pre-buckled elements of the rolled metal.

scholarly journals Mechanical Response and Deformation Mechanisms of TB17 Titanium Alloy at High Strain Rates

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 484
Author(s):  
Xinchi Chen ◽  
Xiaoyong Zhang ◽  
Chao Chen ◽  
Kechao Zhou
Keyword(s):  
Titanium Alloy ◽  
Strain Rate ◽  
Mechanical Response ◽  
Split Hopkinson Pressure Bar ◽  
High Index ◽  
Deformation Mechanisms ◽  
Strain Rates ◽  
Type Ii ◽  
Deformation Twins ◽  
Multiple Deformation

The mechanical response and deformation mechanisms of TB17 titanium alloy were studied at room temperature by the split-Hopkinson pressure bar test. The ultimate compression strength increases from 1050 MPa to 1400 MPa, as the strain rate increases from 2000 s−1 to 2800 s−1. The adiabatic shear failure occurred at strain rate 2800 s−1. When the strain rate was 2000 s−1, only {10 9 3}<331>β type II high index deformation twins, a small number of α” martensite, and interfacial ω phase were detected. When the strain rate was 2400 s−1 and above, multiple deformation mechanisms, including the primary {10 9 3}<331>β type II high index deformation twins, secondary {332}<113>β deformation twins, and α” martensite were identified. The deformation mechanism changes from primary deformation twins and α” martensite to multiple deformation mechanisms (primary and secondary deformation structure) with the increase of strain rates.

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