Rate and temperature effects on the flow stress and tensile strength of metals

Kanel, G. I.

doi:10.1063/1.3686432

Cited by 28 publications

(4 citation statements)

References 30 publications

(52 reference statements)

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“…These precipitates act to pin dislocations. Similar comparisons in behaviour have also been seen when comparing relatively pure forms of aluminium to that of alloys where the alloys such as precipitation hardened AA 6061-T6 show little-to-no precursor decay [43,44], whereas relatively pure forms of aluminium show moderate decay [44,45]. Further, Winey et al [46] showed that thin (less than 600 μm) 1050 Al samples exhibited attenuation of the elastic precursor, whereas the AA 6061-T6 targets did not.…”

Section: (A) Shock Response Of Magnesiumsupporting

confidence: 56%

The shock and spall response of three industrially important hexagonal close-packed metals: magnesium, titanium and zirconium

Hazell

Appleby-Thomas

Wielewski

et al. 2014

Phil. Trans. R. Soc. A.

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Magnesium, titanium and zirconium and their alloys are extensively used in industrial and military applications where they would be subjected to extreme environments of high stress and strain-rate loading. Their hexagonal close-packed (HCP) crystal lattice structures present interesting challenges for optimizing their mechanical response under such loading conditions. In this paper, we review how these materials respond to shock loading via plate-impact experiments. We also discuss the relationship between a heterogeneous and anisotropic microstructure, typical of HCP materials, and the directional dependency of the elastic limit and, in some cases, the strength prior to failure.

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Section: (A) Shock Response Of Magnesiumsupporting

confidence: 56%

The shock and spall response of three industrially important hexagonal close-packed metals: magnesium, titanium and zirconium

Hazell

Appleby-Thomas

Wielewski

et al. 2014

Phil. Trans. R. Soc. A.

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“…[1][2][3][4][5][6][7][8][9][10][11][12] In this regard, shock-wave studies of the dynamic yielding and fracture of single crystals occupy a special place, since they allow the separation of contributions of different mechanisms of nucleation and the growth of plastic deformation and fracture and such experiments are useful for verifying molecular dynamic simulations. During recent decades, shock-wave studies of the dynamic yielding and fracture of metal single crystals have been performed on face-centered cubic (fcc) metals; such as copper [13][14][15][16] and aluminum, [17][18][19][20] body-centered cubic (bcc) metals, such as molybdenum; 21 and hexagonal close-packed (hcp) metals, such as beryllium 22 and zinc.…”

mentioning

confidence: 99%

Shock response of magnesium single crystals at normal and elevated temperatures

Kanel

Garkushin

Савиных

et al. 2014

Journal of Applied Physics

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Strength and elastic deformation of natural and synthetic diamond crystals shock compressed along [100] J.A series of magnesium single crystals, from 0.2 to 3 mm thick, were shock loaded in directions parallel and perpendicular to the c-axis of the hexagonal closed packed (hcp) structure and at 45 to the c-axis. Shock compression along the c-axis is associated with the largest Hugoniot elastic limit (HEL) for this material. Microscopic observation of recovered c-cut samples demonstrated intense twinning with a greater density of twins near the impact surface. The low-energy basal slip was activated by shock loading along the inclined direction and has the smallest HEL. In all cases, we observe the decay of the elastic precursor wave and growth of the HEL with increasing temperature. For the inclined shock compression after the HEL, two plastic waves were found where the stress level of the first plastic wave depends on the peak shock stress. Finally, the largest spall strength was along the transversal direction and the smallest in the off-axis direction. The fracture surface of the sample of transversal orientation contains numerous groves oriented along the base planes of the crystals. V C 2014 AIP Publishing LLC. [http://dx.

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“…According to papers written by G.I. Kanel' with coworkers [6,[19][20][21] the value of HEL varies. For example, the value depends on the time (and vice versa) during which the uniaxial load σ xx is maintained in elastic solid.…”

Section: Nd International Symposium On Shock Waves (Issw32)mentioning

confidence: 99%

Picosecond-Nanosecond Laser Flash, Formation of powerful Elastic Waves in Crystals, and Shock Peening

Inogamov¹,

Zhakhovsky²,

Ilnitsky³

et al. 2019

Proceedings of the 32nd International Symposium on Shock Waves (ISSW32 2019)

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Elastic-plastic transformations together or independently from polymorphic phase transitions are important for theory of shock waves. Here we discuss a classification consisting from (I) elastic, (II) split elastic-plastic, and (III) pure plastic shocks. The split shocks means that (1) there are two jumps: the elastic precursor and plastic shock, and that (2) the jumps are independent from each other, the precursor moves with elastic speed of sound overrunning the plastic jump and going further and further ahead as time proceeds and becoming weaker and weaker.We oppose the split shock to the one-wave two zones shock (1W2Z shock). The 1W2Z wave (1) propagates as whole, (2) the plastic shock dynamically supports the elastic one, (3) the distance between the jumps does not change in time; here we say about the distance averaged over time.The powerful elastic shocks (their amplitudes are much higher than are usually suggested for elastic shocks) were found in experiments with femtosecond laser pulses and confirmed in large scale molecular dynamics (MD) simulations. The observation of the 1W2Z shocks is another important finding coming from MD. In the paper below we want to emphasize that the 1W2Z wave (proved to exist in MD) is not some tiny submicron feature belonging to MD or to ultrashort shocks. We hypothesized that it may be detected at spatio-temporal scales significantly larger than micron. Thus it should be included into the above classification as a new regime. It should be placed between the II-nd and III-rd regimes in the old classification.The report is devoted to lasers, shocks, and applications. In the second part of the report the generation and propagation of the shocks created for laser shock peening by lasers with ultrashort or nanosecond pulses are considered.

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Rate and temperature effects on the flow stress and tensile strength of metals

Cited by 28 publications

References 30 publications

The shock and spall response of three industrially important hexagonal close-packed metals: magnesium, titanium and zirconium

The shock and spall response of three industrially important hexagonal close-packed metals: magnesium, titanium and zirconium

Shock response of magnesium single crystals at normal and elevated temperatures

Picosecond-Nanosecond Laser Flash, Formation of powerful Elastic Waves in Crystals, and Shock Peening

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