Experimental study on impact-initiated characters of W/Zr energetic fragments

Luo, Puguang; Wang, Zaicheng; Jiang, Chunlan; Mao, Liang; Li, Qiang

doi:10.1016/j.matdes.2015.06.107

Cited by 51 publications

(16 citation statements)

References 8 publications

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“…13,14 To date, most W/Zr research has concentrated on the formula, preparation methods, and ways to enhance the damage effects of warheads based on the impact initiation characteristics. [15][16][17] However, studies of the relevant mechanical properties and reaction mechanism are seldom found in the literature. In this study, the mechanical properties of W/Zr composites are examined using a split Hopkinson pressure bar (SHPB) apparatus at different impact velocities.…”

Section: Introductionmentioning

confidence: 99%

Impact-initiated behavior and reaction mechanism of W/Zr composites with SHPB setup

2016

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The dynamic compressive behavior of a hot pressed tungsten/zirconium (W/Zr) composite with a mass proportion of 34:64 (W:Zr) was experimentally investigated using a split Hopkinson pressure bar and a high-speed camera. The W/Zr composite has high strength but some brittle characteristics; when subjected to a strong enough impact loading, the sample is crushed, rapidly releasing high amounts of energy as a result. This impact-initiated reaction depends on the loading conditions, where a higher loading strain rate resulting a smaller fragment size. The Zr phase is involved in the reaction as the active component of the composite, and these fragments can be divided into small, medium, and large fragments with their reactions labeled as “fire ball,” “spark,” and “no react” respectively. A simple model is constructed to analyze the heat generated during plastic deformation based on yield stress, crack speed and the thermal properties of the brittle material. Our proposed model’s prediction of temperature increase at initiation may reach several hundred degrees Celsius.

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Section: Introductionmentioning

confidence: 99%

Impact-initiated behavior and reaction mechanism of W/Zr composites with SHPB setup

2016

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“…Ye and Li [10] experimentally studied the damaging effects of energetic fragments on targets such as oil tanks. Wang et al [11] and Luo et al [12] studied the relationship between the pressure and reaction efficiency of energetic fragments in a confined space. With increasing fragment velocity, the pressure and reaction efficiency in a confined space are increased.…”

Section: Introductionmentioning

confidence: 99%

Study of the Impact Energy Release Characteristics of Fine‐Grained Fe−Al Energetic Jets

Jiang³

2019

Propellants Explo Pyrotec

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Fine‐grained Fe−Al energetic materials have high reaction enthalpies, and the release energy of the iron phase and a large portion of the active aluminium phase in sintered materials enables the replacement of conventional materials in new types of weapons. To study the energy release characteristics of fine‐grained Fe−Al energetic jets under impact loading, a dynamic energy acquisition system is established to quantify the energy generated by the response of fine‐grained Fe−Al energetic jets to impact targets. The pressure‐time curves of fine‐grained Fe−Al energetic jets with different ratios under different impact conditions are obtained, and a method for calculating the pressure differential value is proposed to quantitatively determine the energy release values of fine‐grained Fe−Al energetic jets. The energy release mechanism of the Fe−Al energetic jet is analysed at the micro‐level by recovering the reaction products. The results show that there is an optimal Fe−Al ratio that attains the greatest energy release effect from fine‐grained Fe−Al energetic jets. With increasing impact energy, the energy released by energetic jets tends to increase, and an impact energy threshold that saturates the chemical reaction of energetic materials in the jets exists. The relationship between the impact conditions and the energy release value of fine‐grained Fe−Al energetic jets is established.

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“…C. M. Huang et al 17 investigated the quasi-static and impact-initiated response of Zr 55 Ni 5 Al 10 Cu 30 alloy, it can be initiated by a ballistic impact and then completely burned in air. P. G. Luo et al 18 studied the impactinitiated reaction behavior of W/Zr-based metallic glass composites by a quasi-sealed test chamber, the results showed that the reaction of W/Zr energetic fragments is related to the shock energy, which is codetermined by the impact velocity, materials and thickness of the plate. However, compared with the traditional energetic materials, such as thermite mixtures, metal polymers, intermetallic compounds, the reaction type and mechanism of Zr-based metallic glasses are different.…”

Section: Introductionmentioning

confidence: 99%

Impact-induced chemical reaction behavior of ZrTiNiCuBe bulk metallic glass fragments impacting on thin plates

Chen¹,

Du²,

Cheng³

et al. 2018

Mater. Tehnol.

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The impact-induced chemical reaction behavior of ZrTiNiCuBe bulk metallic glass was investigated by ballistic impact experiments. The Zr-based metallic glass fragments were launched at different initial velocities to normally impact 08 low-carbon steel plates with different thicknesses. The impact-induced deflagration was observed, and the shock wave overpressure after the target and the damage patterns of the thin plates were measured and analyzed. As the results show, the impact-induced chemical reaction is co-determined by the impact velocity and the thickness of the plate. The higher the impact velocity and the thinner the plate, the higher the shock wave overpressure and energy release rate due to a more intense chemical reaction. The damage pattern of ductile reaming was formed and the radial reaming effect is obvious due to the chemical energy released during the penetration. Moreover, combining theoretical considerations with experimental results, the engineering models of the shock wave pressure and the deflection were developed, the calculated results agree well with the experimental data, which can provide a reliable basis for the evaluation of the impact response and energy release of the Zr-based metallic glasses. Keywords: Zr-based bulk metallic glass fragment, impact-induced chemical reaction, shock wave overpressure, energy release characteristics S pomo~jo balisti~nega udarnega eksperimenta so avtorji prispevka raziskovali udarno inducirano kemijsko reakcijo masivnega kovinskega stekla iz zlitine na osnovi ZrTiNiCuBe. Avtorji raziskave so z drobci kovinskega stekla na osnovi Zr bombardirali jeklene plo{~e razli~ne debeline z razli~no za~etno hitrostjo. Na tar~i so opazovali udarno inducirane eksplozije in nadtlak udarnih valov. Izmerili in analizirali so vzorce nastalih po{kodb na tankih jeklenih plo{~ah. Rezultati analiz so pokazali, da je obseg udarno inducirane kemi~ne reakcije odvisen od hitrosti udarca in debeline jeklene plo{~e. Vi{ja kot je hitrost udarca in tanj{a kot je plo{~a, vi{ji je nadtlak udarnega vala in hitrost sprostitve energije zaradi bolj intenzivne kemi~ne reakcije. Nastali vzorci po{kodb so imeli obliko duktilne vrtine in radialni vrtilni efekt so pripisali spro{~eni kemi~ni energiji med penetracijo drobcev. Nadalje so avtorji kombinirali teoreti~na spoznanja z eksperimentalnimi rezultati in razvili in`enirske modele za tlak udarnih valov in deformacije zaradi upogibanja. Izra~uni se dobro ujemajo z eksperimentalnimi podatki, kar predstavlja zanesljivo osnovo za ovrednotenje udarnega odgovora in sprostitve energije kovinskih stekel na osnovi Zr. Klju~ne besede: delci masivnega kovinskega stekla na osnovi Zr, udarno inducirana kemi~na reakcija, nadtlak udarnih valov, zna~ilnosti spro{~anja energije

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Experimental study on impact-initiated characters of W/Zr energetic fragments

Cited by 51 publications

References 8 publications

Impact-initiated behavior and reaction mechanism of W/Zr composites with SHPB setup

Impact-initiated behavior and reaction mechanism of W/Zr composites with SHPB setup

Study of the Impact Energy Release Characteristics of Fine‐Grained Fe−Al Energetic Jets

Impact-induced chemical reaction behavior of ZrTiNiCuBe bulk metallic glass fragments impacting on thin plates

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