scholarly journals The spall strength and Hugoniot elastic limit of tantalum with various grain size

2012 ◽  
Author(s):  
Sergey V. Razorenov ◽  
Gennady Garkushin ◽  
Gennady I. Kanel ◽  
Olga Nikolaevna Ignatova
Keyword(s):  
Grain Size ◽  
Elastic Limit ◽  
Spall Strength ◽  
Hugoniot Elastic Limit

The effect of microstructural variations upon the dynamic compressive and tensile strengths of aluminas

1994 ◽  
Vol 446 (1927) ◽  
pp. 309-318 ◽  
Keyword(s):  
Grain Size ◽  
Rise Time ◽  
Elastic Limit ◽  
Spall Strength ◽  
Plastic Wave ◽  
Plate Impact ◽  
Hugoniot Elastic Limit ◽  
Storage Oscilloscope ◽  
Content Variation ◽  
Impact Experiments

Seven aluminas of varying grain size, glass content and porosity were tested in plate-impact experiments over a range of impact stresses. Longitudinal stresses were measured using manganin gauges bonded between 8 mm thick tiles and polymethylmethacrylate (PMMA) backing blocks. Wave profiles were recorded by a 1 GS s –1 storage oscilloscope. Measurements were made of the Hugoniot elastic limit (HEL), rise time of the ‘plastic’ wave and of spall strength for each material. The spall strength was measured at impact velocities corresponding to less than 0.4 HEL stress for each material. The HEL was observed to decrease with increasing grain size while the ‘plastic’ wave rise time increased with increasing grain size. The spall strength increases with a decrease in porosity and an increase in alumina content. Variation in the spall strength was observed to occur over a range of stresses below half the elastic limit of the material.

scholarly journals Прочностные свойства полученной с применением аддитивной технологии керамики на основе оксида алюминия при ударно-волновом нагружении

2018 ◽  
Vol 44 (19) ◽  
pp. 96
Author(s):  
В.В. Промахов ◽  
А.С. Савиных ◽  
Я.А. Дубкова ◽  
Н.А. Шульц ◽  
Н.В. Грунт ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Shock Compression ◽  
Elastic Limit ◽  
Laser Interferometer ◽  
Spall Strength ◽  
Oxide Ceramic ◽  
Hugoniot Elastic Limit ◽  
Full Wave ◽  
Ceramic Samples ◽  
Wave Profiles

AbstractAluminum-oxide ceramic samples have been prepared by additive manufacturing with subsequent sintering. The Hugoniot elastic limit and spall strength of the ceramics are determined by analyzing the full wave profiles of the samples recorded using a laser interferometer upon their shock compression with amplitudes of 6.8 and 13.8 GPa.

scholarly journals Influence of Material Properties on the Ballistic Performance of Ceramics for Personal Body Armour

2003 ◽  
Vol 10 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Christian Kaufmann ◽  
Duane Cronin ◽  
Michael Worswick ◽  
Gilles Pageau ◽  
Andre Beth
Keyword(s):  
Material Properties ◽  
Elastic Limit ◽  
Spall Strength ◽  
Ceramic Materials ◽  
Ceramic Tiles ◽  
Hugoniot Elastic Limit ◽  
Depth Of Penetration ◽  
Ballistic Performance ◽  
Body Armour ◽  
Penetration Tests

In support of improved personal armour development, depth of penetration tests have been conducted on four different ceramic materials including alumina, modified alumina, silicon carbide and boron carbide. These experiments consisted of impacting ceramic tiles bonded to aluminum cylinders with 0.50 caliber armour piercing projectiles. The results are presented in terms of ballistic efficiency, and the validity of using ballistic efficiency as a measure of ceramic performance was examined. In addition, the correlation between ballistic performance and ceramic material properties, such as elastic modulus, hardness, spall strength and Hugoniot Elastic Limit, has been considered.

scholarly journals The Strength of Inconel 625, Manufactured by the Method of Direct Laser Deposition under Sub-Microsecond Load Duration

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1796
Author(s):  
Vladimir Promakhov ◽  
Nikita Schulz ◽  
Alexander Vorozhtsov ◽  
Andrey Savinykh ◽  
Gennady Garkushin ◽  
...  
Keyword(s):  
Elastic Limit ◽  
Structural Parameters ◽  
Spall Strength ◽  
Laser Deposition ◽  
Inconel 625 ◽  
Chromium Alloy ◽  
Hugoniot Elastic Limit ◽  
Direct Laser Deposition ◽  
Direct Laser ◽  
Wave Profiles

This paper presents the results of measurements of the spall strength and elastic-plastic proper-ties, under dynamic and static loads, of the high-strength heat-resistant nickel-chromium alloy Inconel 625, obtained by the direct laser deposition method. The structural parameters of the obtained samples and the mechanical properties during static tests were studied. According to our information, anisotropy in the structural parameters operates primarily at the level of plastic deformation of alloys. Shock compression of the additive alloy Inconel 625 samples in the range of 6–18 GPa was carried out using a light-gas gun, both along and perpendicular to the direction of the deposition. The strength characteristics were determined from the analysis of the shock wave profiles, which were recorded using the VISAR laser velocimeter during the loading of samples. It was found that the value of the spall strength of additive samples does not depend on the direction of deposition, and the Hugoniot elastic limit of samples loaded perpendicular to the deposition direction is about ~10% higher. With an increase in the maximum compression stress, the material’s spall strength increases slightly, but for both types of samples, a slight decrease in the Hugoniot elastic limit was observed as the compression stresses increase. On the basis of the measured wave profiles, shock Hugoniots of the samples of the alloy Inconel 625, loaded both along and perpendicular to the direction of deposition, are constructed in this pressure range.

scholarly journals Исследование скоростных зависимостей напряжения пластического течения и разрушения стали 09Г2СА-А при нормальной и повышенной температурах

2021 ◽  
Vol 91 (11) ◽  
pp. 1698
Author(s):  
Г.И. Канель ◽  
Г.В. Гаркушин ◽  
А.С. Савиных ◽  
С.В. Разоренов ◽  
С.А. Атрошенко
Keyword(s):  
Fracture Zone ◽  
Elastic Limit ◽  
Elevated Temperatures ◽  
Armco Iron ◽  
High Strain ◽  
Spall Strength ◽  
Metallographic Analysis ◽  
Hugoniot Elastic Limit ◽  
Wave Profiles ◽  
Temperature Rate

The Hugoniot elastic limit and spall strength of reactor steel 09G2SA-A under shock compression were measured by recording and subsequent analysis of the wave profiles. The temperature-rate dependences of the resistance to high-strain rate and fracture of steel at normal and elevated temperatures are determined. The results of measurements of the strength characteristics of steel under spall are supplemented by a metallographic analysis of the fracture zone and compared with data for 15Kh2NMFA reactor steel and Armco iron.

Effect of Thermal Treatment on the Hugoniot Elastic Limit and Spall Strength of the Preeutectic Pb–2.77% Sb Alloy

2020 ◽  
Vol 121 (11) ◽  
pp. 1119-1125
Author(s):  
G. V. Garkushin ◽  
A. S. Savinykh ◽  
G. I. Kanel’ ◽  
S. V. Razorenov ◽  
O. N. Ignatova ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Elastic Limit ◽  
Spall Strength ◽  
Hugoniot Elastic Limit

scholarly journals Study of flow stress and spall strength of additively manufactured Ti-6-4 alloy

2018 ◽  
Vol 183 ◽  
pp. 03003
Author(s):  
Vitaly Paris ◽  
Amitai Cohen ◽  
Eli Gudinetsky ◽  
Refael Hevroni ◽  
Shmuel Samuha ◽  
...  
Keyword(s):  
Elastic Limit ◽  
Split Hopkinson Pressure Bar ◽  
Spall Strength ◽  
Sem Analysis ◽  
Spall Fracture ◽  
Hopkinson Pressure Bar ◽  
Hugoniot Elastic Limit ◽  
Impact Tests ◽  
Planar Impact ◽  
Pressure Bar

The use of additive manufacturing (AM) by Electron Beam Melting (EBM) or Selective Laser Melting (SLM) has extensively grown in the past few years. A major goal in AM is to manufacture materials with mechanical properties at least as good as traditionally manufactured materials. In this work we present the results of planar impact tests and Split Hopkinson Pressure Bar tests (SHPB) on Ti-6Al-4V manufactured by EBM and LSM techniques. Stress strain curves based on SHPB measurements at strain rate of about 1500 s-1 display similar plastic flow stresses for SLM and EBM processed Ti-6Al-4V alloys, and about 15% higher than reported for commercial Ti-6Al-4V alloy. Results of planar impact tests on SLM samples display slightly higher spall strength than EBM while the stress at Hugoniot elastic limit (HEL) is practically the same. Hugoniot elastic limit and spall strength estimates for EBM-and SLM-processed Ti-6Al-4V alloys are at least as high as values obtained for conventionally-processed alloys. The results of post mortem SEM analysis of the spall fracture have demonstrated significant differences in the spall fracture characteristics between the AM-processed and commercial Ti-6Al-4V alloys.

Spall strength and Hugoniot elastic limit of a zirconium-based bulk metallic glass under planar shock compression

2007 ◽  
Vol 22 (2) ◽  
pp. 402-411 ◽  
Author(s):  
Fuping Yuan ◽  
Vikas Prakash ◽  
John J. Lewandowski
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Shock Compression ◽  
Elastic Limit ◽  
Spall Strength ◽  
Hugoniot Elastic Limit ◽  
Gas Gun ◽  
Planar Shock ◽  
Planar Impact ◽  
Different Levels

Results are presented on the shock response of a zirconium-based bulk metallic glass (BMG), Zr41.25Ti13.75Ni10Cu12.5Be22.5, subjected to planar impact loading. An 82.5-mm bore single-stage gas-gun facility at Case Western Reserve University, Cleveland, OH, was used to conduct the shock experiments. The particle velocity profiles, measured at the back (free) surface of the target plate by using the velocity interferometer system for any reflector (VISAR), were analyzed to (i) better understand the structure of shock waves in BMG subjected to planar shock compression, (ii) estimate residual spall strength of the BMG after different levels of shock compression, and (iii) obtain the Hugoniot elastic limit (HEL) of the material. The spall strength was found to decrease moderately with increasing levels of the applied normal impact stress. The spall strength at a shock-induced stress of 4.4 GPa was 3.5 GPa while the spall strengths at shock-induced stresses of 5.1, 6.0, and 7.0 GPa were 2.72, 2.35, and 2.33 GPa, respectively. The HEL was estimated to be 6.15 GPa.

scholarly journals Влияние высокотемпературного отжига на сопротивление высокоскоростному деформированию и разрушению тантала при температуре 20 и 500-=SUP=-o-=/SUP=-C

2019 ◽  
Vol 89 (5) ◽  
pp. 725
Author(s):  
Г.В. Гаркушин ◽  
А.С. Савиных ◽  
С.В. Разоренов ◽  
Г.И. Канель
Keyword(s):  
Strain Rate ◽  
Elastic Limit ◽  
Spall Strength ◽  
Laser Doppler Velocimeter ◽  
Spall Fracture ◽  
Hugoniot Elastic Limit ◽  
Critical Fracture ◽  
Strength Dependence ◽  
Wave Profiles ◽  
Critical Fracture Stress

AbstractTwo series of shock-wave experiments have been conducted in order to measure the Hugoniot elastic limit and determine the strain rate dependence of critical fracture stress for tantalum experiencing spall fracture. Tantalum specimens have been preannealed in vacuum at 1000°C. The evolution of elastoplastic compression shock waves at room and elevated up to 500°C temperatures has been presented from complete wave profiles recorded by a VISAR laser Doppler velocimeter. The spall strength dependence on the strain rate during the expansion of the material in a rarefaction wave has been determined.

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