Microstructures and adiabatic shear bands formed by ballistic impact in steels and tungsten alloy

In order to research the formation and spread of adiabatic shear bands in Ti-6Al-4V targets, LS-DYNA code is used to simulate the ballistic impact process. The projectile used in the impact test is a flat-headed steel cylinder with diameter of 7.62mm and length of 39mm. The results of simulated and impact test are in good agreement. Multiple adiabatic shear bands form in Ti-6Al-4V targets under high-speed ballistic impact. Adiabatic shear bands were found to extend parallel with a certain distance. The formation and distribution of adiabatic shear bands was related to the breaking-off of projectiles, which was caused by the distribution of maximum shear stress in Ti-6Al-4V targets and projectiles.

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THE ROLE OF ADIABATIC SHEAR BANDS EFFECT IN PENETRATION PROCESS

PROBLEMY TECHNIKI UZBROJENIA ◽

10.5604/01.3001.0012.8308 ◽

2019 ◽

Vol 147 (3/2018) ◽

pp. 7-17

Author(s):

Mariusz Magier

Keyword(s):

Literature Review ◽

Structural Modification ◽

Shear Bands ◽

Adiabatic Shear ◽

Depleted Uranium ◽

Adiabatic Shear Bands ◽

Penetration Process ◽

Comparative Analyses ◽

And Tungsten

The phenomenon of creation of adiabatic shear bands occurring at extreme strains of investigated material is analysed in the paper. The effects of penetration for projectiles made of depleted uranium and tungsten sinters were compared to analyse an influence of the adiabatic shear bands into the process of penetration and to show some possibilities for structural modification of tungsten sinters increasing the penetration capabilities. The comparative analyses were conducted on the base of literature review.

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Characterization of adiabatic shear bands in AM60B magnesium alloy under ballistic impact

Materials Characterization ◽

10.1016/j.matchar.2011.03.003 ◽

2011 ◽

Vol 62 (5) ◽

pp. 496-502 ◽

Cited By ~ 35

Author(s):

D.L. Zou ◽

L. Zhen ◽

C.Y. Xu ◽

W.Z. Shao

Keyword(s):

Magnesium Alloy ◽

Shear Bands ◽

Adiabatic Shear ◽

Ballistic Impact ◽

Adiabatic Shear Bands

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The Effect of Secondary Metalworking Processes on Susceptibility of Aircraft to Catastrophic Failures and Prevention Methods

Archives of Metallurgy and Materials ◽

10.2478/amm-2013-0152 ◽

2013 ◽

Vol 58 (4) ◽

pp. 1207-1212

Author(s):

E.S. Dzidowski

Keyword(s):

Dynamic Recovery ◽

Fatigue Cracks ◽

Shear Bands ◽

Adiabatic Shear ◽

Deformation Mechanisms ◽

Processing Maps ◽

Adiabatic Shear Bands ◽

Flow Localization ◽

Catastrophic Failures ◽

Prevention Methods

Abstract The causes of plane crashes, stemming from the subcritical growth of fatigue cracks, are examined. It is found that the crashes occurred mainly because of the negligence of the defects arising in the course of secondary metalworking processes. It is shown that it is possible to prevent such damage, i.e. voids, wedge cracks, grain boundary cracks, adiabatic shear bands and flow localization, through the use of processing maps indicating the ranges in which the above defects arise and the ranges in which safe deformation mechanisms, such as deformation in dynamic recrystallization conditions, superplasticity, globularization and dynamic recovery, occur. Thanks to the use of such maps the processes can be optimized by selecting proper deformation rates and forming temperatures.

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