Some Metallurgical Aspects of the Dynamic Expansion of Shells

Stelly, M.; Legrand, Julien; Dormeval, R.

doi:10.1007/978-1-4613-3219-0_8

Cited by 14 publications

(4 citation statements)

References 11 publications

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“…Grebe et al [29] Stelly et al [30] Marchand and Duffy [31] Shockey et al [32] Me-Bar and Shechtman [33] Timothy and Hutchings [34] Meyers et al [35,36] da Silva and Ramesh [37] Chichili et al [38] Xue et al [39] Steels Hartley et al [40] Bai et al [41,42] Chen et al [43] Xu et al [44] Manion and Stock [45] Glenn and Leslie [46] Thornton and Heiser [47] Wingrove [48] Manion and Wingrove [49] Woodward and Aghan [50] Derep [51] Stelly et al [52] Wright and Batra [53] Giovanola [54] Cho et al [55] Liao and Duffy [56] Beatty et al [57] Meunier et al [58] Wittman et al [59,60] Lins et al [180] Stainless steels…”

Section: Ti and Alloysmentioning

confidence: 99%

Shear Localization in Dynamic Deformation: Microstructural Evolution

Jing-hua

Bai

et al. 2008

Metall Mater Trans A

244

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Investigations made by the authors and collaborators into the microstructural aspects of adiabatic shear localization are critically reviewed. The materials analyzed are low-carbon steels, 304 stainless steel, monocrystalline Fe-Ni-Cr, Ti and its alloys, Al-Li alloys, Zircaloy, copper, and Al/SiC p composites. The principal findings are the following: (a) there is a strain-ratedependent critical strain for the development of shear bands; (b) deformed bands and whiteetching bands correspond to different stages of deformation; (c) different slip activities occur in different stages of band development; (d) grain refinement and amorphization occur in shear bands; (e) loss of stress-carrying capability is more closely associated with microdefects rather than with localization of strain; (f) both crystalline rotation and slip play important roles; and (g) band development and band structures are material dependent. Additionally, avenues for new research directions are suggested.

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Section: Ti and Alloysmentioning

confidence: 99%

Shear Localization in Dynamic Deformation: Microstructural Evolution

Jing-hua

Bai

et al. 2008

Metall Mater Trans A

244

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“…So, the essence of microstructure of ASB and its forming mechanism is one of the most attentions question to material researcher. Stelly and Dormeval [7], Pak [8], Meyers and Pak [9], Grebe [10], Meyers [11], etc. observed carefully the microstructure in adiabatic shear band of commercial pure titanium and Ti-6Al-4V by means of transmission electron microscope and found that selected diffraction pattern in the interior of ASB is greatly different from that of exterior of ASB.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of Grains Refining in Adiabatic Shear Band of Titanium Alloy

Sun¹,

Xu²,

Liu

2012

AMR

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Dynamic shearing high strain-rate experiments on three types of titanium alloy have been carried out by using a modified split Hopkinson bar. Microstructure and mechanism for grains refining in adiabatic shear band formed under the condition of high strain-rate were investigated by means of optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). It is shown that the mechanisms for grains refining in adiabatic shear band of titanium alloy mostly consist of three sorts. They are the mechanism of breakdown of elongated grains which due to action of dislocations,and the mechanism of rupture of twins and the mechanism of dynamic recrystallization, respectively. The mechanism of dynamic recrystallization is the universal one for grains refining in adiabatic shear band of titanium alloy. The formation of refining grains is usually a result of combined action of several sorts of mechanisms.

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“…Adiabatic shear bands have been investigated for a wide range of materials. [1][2][3] These bands form under conditions of high strain rate (.10 3 s 21 ) with accompanying large strains. Thus, the temperature of the material will rise during deformation and this rise is a major contributor to obtaining the shear band.…”

Section: Introductionmentioning

confidence: 99%

“…Many investigations have centred on analyses of the structure within adiabatic shear bands in bulk Fe-C components. [1][2][3][4][5][6][7][8][9][10][11] Initial studies were on band formation during single step dynamic testing. The bands were known as 'white layers' because of their resistance to etching.…”

Section: Introductionmentioning

confidence: 99%

Microstructure in adiabatic shear bands in a pearlitic ultrahigh carbon steel

Syn¹,

Lesuer²,

Sherby³

2005

Materials Science and Technology

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Adiabatic shear bands, obtained in compression deformation at a strain rate of 4000 s -1 , in a pearlitic 1.3%C steel, were investigated. Shear-bands initiated at 55% compression deformation with the width of the band equal to 14 µm. Nano-indentor hardness of the shear band was 11.5 GPa in contrast to the initial matrix hardness of 3.5 GPa. The high strength of the shear band is attributed to its creation from two sequential events. First, large strain deformation, at a high strain rate, accompanied by adiabatic heating, led to phase transformation to austenite. Second, retransformation upon rapid cooling occurred by a divorced eutectoid transformation. The result is a predicted microstructure consisting of nano-size carbide particles within a matrix of fine ferrite grains. It is proposed that the divorced eutectoid transformation occurs in iron-carbon steels during high rate deformation in ball milling, ball drop tests and in commercial wire drawing.

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Some Metallurgical Aspects of the Dynamic Expansion of Shells

Cited by 14 publications

References 11 publications

Shear Localization in Dynamic Deformation: Microstructural Evolution

Shear Localization in Dynamic Deformation: Microstructural Evolution

Mechanisms of Grains Refining in Adiabatic Shear Band of Titanium Alloy

Microstructure in adiabatic shear bands in a pearlitic ultrahigh carbon steel

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