Structure and properties of dynamically compressed Al99.5 and AlCuZr alloy

Richert, M.; Leszczyńska, B.

doi:10.1016/j.jallcom.2004.06.004

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Ширина полос сдвига составляет от 0,5 до 0,1 мкм для разных материалов и условий деформации. В работах [23][24][25], где исследована деформация сжатия при ε • = 17,7÷606 с -1 технически чистого алюминия Al99.5 (99,5 % Al) и сплавов AlCu4Zr (4 % Cu, 0,5 % Zr), AlMg5 (5,5 % Mg) и AlZn6Mg2,5CuZr (6 % Zn, 2,6 % Mg, 1,5 % Cu, 0,4 % Zr), они названы «микрополоcами сдвига», и их ширина уменьшается с увеличением степени деформации, которая варьировалась в пределах ε = 0÷0,62. В светлых полосах видны мелкие участки диаметром около 100 нм, различающиеся по оттенку и контрастности (см.…”

Section: результаты статических и динамических испытанийunclassified

Effect of strain rate on the microstructure and mechanical properties of aluminum alloy AA2B06-O of the Al–Cu–Mg system

Хина

Pokrovsky

Zhang

et al. 2021

Izv.VUZ. Tsvet. Met.

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The study covers the tensile properties and microstructure of AA2B06-O aerospace aluminum alloy (Al–Cu–Mg system) at low (0.001–1.0 s–1) and high (1293–5045 s–1) strain rates. The stain rate at relatively slow (quasistatic) tension has a small effect on mechanical properties. Rasing strain rate at fast (dynamic) loading results in a substantial (nearly twofold) simultaneous increase in the ultimate tensile strength and plasticity (elongation to failure) of the alloy with the yield stress virtually unchanged. Transmission electron microscopy revealed a homogeneous nature of plastic deformation on the microlevel at slow loading and inhomogeneous one at fast loading. The latter is observed as localized deformation in the form of adiabatic microshear bands where complex dislocation structures are formed such as dislocation tangles, dipole and multipole configurations. The first stage of dynamic recrystallization is observed in certain domains of microshear bands due to the heat released at localized plastic deformation. It was shown that the changeover of deformation mechanisms when passing from the quasistatic to dynamic tension causes a significant change in mechanical behavior of the material. Thus, a simultaneous increase in both strength and plasticity can take place not only in nanostructured materials obtained by severe plastic deformation techniques (e.g. equal channel angular pressing), but also at the high strain rate deformation of an aluminum alloy having an «ordinary» microstructure after rolling and low-temperature annealing. The experimental results open up new prospects for practical application of high strain rate pulse deformation methods, such as impact hydroforming, for producing complex-shape articles from sheet blanks in one operation due to substantially improved technological plasticity of the material.

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Section: результаты статических и динамических испытанийunclassified

Effect of strain rate on the microstructure and mechanical properties of aluminum alloy AA2B06-O of the Al–Cu–Mg system

Хина

Pokrovsky

Zhang

et al. 2021

Izv.VUZ. Tsvet. Met.

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“…Significant grain refinement maybe achieved in bulk polycrystalline metals through the application of severe plastic deformation (SPD) [1][2][3][4][5]. Several SPD processing techniques lead to microstructure refinement with various grain size and various contributions of high-angle boundaries [6][7][8]. Laser Shock Processing (LSP) technique treats the target through localized mechanical deformation by employing the shock waves generated at the work piece surface by high intensity lasers.…”

Section: Introductionmentioning

confidence: 99%

Thermostablity Study on Microstructure and Microhardness of Laser Shock Processed Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si

et al. 2011

MSF

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In this paper, the microstructure and microhardness of laser shock processed (LSP) Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si titanium alloy with and without annealing were examined and compared. The titanium alloy samples were LSP processed with 3 layers at 4.24GW/cm2. Some of the samples were vacuum annealed at 623K for 10 hours. The microscopic structure with and without annealing were tested and analyzed by SEM, TEM. The results indicated that after LSP, the shock wave provided high strain rate deformation and led to the formation of ultra-fine grain. Comparing with the samples without annealing, the dislocation density was lower and the grain-boundary was more distinct in the annealed samples, but the sizes of the ultra-fine grain didn’t grow bigger after annealing. On the other hand, the microhardness measurement was made on the cross-section. It is obviously that the laser shock processing improved the microhardness of the Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si for about 12.2% at the surface, and the hardness affected depth is about 500 microns. The microhardness after annealing is 10 HV0.5lower, but the affected depth is not changed. The titanium alloy after LSP is thermostable at 623K; thus break the USA standard AMS2546, in which titanium parts after LSP are subjected in subsequent processing should not exceed 589K.

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Effect of Strain Rate on the Microstructure and Mechanical Properties of AA2B06-O Aluminum Alloy of the Al–Cu–Mg System

Хина

Pokrovsky

Zhang

et al. 2021

Russ. J. Non-ferrous Metals

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Structure and properties of dynamically compressed Al99.5 and AlCuZr alloy

Cited by 3 publications

References 7 publications

Effect of strain rate on the microstructure and mechanical properties of aluminum alloy AA2B06-O of the Al–Cu–Mg system

Effect of strain rate on the microstructure and mechanical properties of aluminum alloy AA2B06-O of the Al–Cu–Mg system

Thermostablity Study on Microstructure and Microhardness of Laser Shock Processed Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si

Effect of Strain Rate on the Microstructure and Mechanical Properties of AA2B06-O Aluminum Alloy of the Al–Cu–Mg System

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