Microstructural characteristics and formation mechanism of adiabatic shear bands in Al–Zn–Mg–Cu alloy under dynamic shear loading

2020 ◽  
Vol 791 ◽  
pp. 139430 ◽  
Author(s):  
Weiliang Zhang ◽  
Liangju He ◽  
Zhigang Lu ◽  
Gregory B. Kennedy ◽  
Naresh N. Thadhani ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Shear Bands ◽  
Shear Loading ◽  
Adiabatic Shear ◽  
Dynamic Shear ◽  
Adiabatic Shear Bands ◽  
Microstructural Characteristics ◽  
Cu Alloy

Microstructure Inhomogeneities in 2519A Aluminum Plate Penetrated by an Incendiary Projectile

2007 ◽  
Vol 546-549 ◽  
pp. 1049-1054 ◽  
Author(s):  
Hui Gao ◽  
Xin Ming Zhang ◽  
Hui Zhong Li ◽  
Ying Liu
Keyword(s):  
Shear Bands ◽  
Target Material ◽  
Adiabatic Shear ◽  
Aluminum Plate ◽  
Middle Region ◽  
Adiabatic Shear Bands ◽  
Target Plate ◽  
Microstructural Characteristics ◽  
Aluminum Target ◽  
Crater Bottom

2519A aluminum plate was shot obliquely by an incendiary projectile with the diameter of 7.62mm at impact velocity of 818m/s. The penetration inhomogeneities of the crater of 2519A aluminum target plate were investigated with optical microscopy (OM), scanning electron microscopy (SEM). Melted substance, a mixture of the target material and the projectile was found at the interface of target and projectile. Different microstructural characteristics were observed along the crater depth. Grains were elongated near the entrance area, while severely kinked grains and adiabatic shear bands were present in the middle region, and microbands, as well as abnormal grown grains, appeared at the crater bottom. The failure form of target is mainly ductile expanding.

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

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.

scholarly journals Adiabatic shear bands formation in polycrystalline aluminium

2021 ◽  
Vol 1121 (1) ◽  
pp. 012007
Author(s):  
I Mania ◽  
H Paul ◽  
R Chulist ◽  
P Petrzak
Keyword(s):  
Shear Bands ◽  
Adiabatic Shear ◽  
Adiabatic Shear Bands

Formation of adiabatic shear bands and instability of plastic flow in Zr and Zr-Nb alloys in spherical stress waves

1999 ◽  
Vol 42 (1) ◽  
pp. 61-71 ◽  
Author(s):  
A.V Dobromyslov ◽  
N.I Taluts ◽  
N.V Kazantseva ◽  
E.A Kozlov
Keyword(s):  
Plastic Flow ◽  
Shear Bands ◽  
Stress Waves ◽  
Adiabatic Shear ◽  
Adiabatic Shear Bands

A microstructural investigation of adiabatic shear bands in an interstitial free steel

2007 ◽  
Vol 457 (1-2) ◽  
pp. 205-218 ◽  
Author(s):  
J.F.C. Lins ◽  
H.R.Z. Sandim ◽  
H.-J. Kestenbach ◽  
D. Raabe ◽  
K.S. Vecchio
Keyword(s):  
Shear Bands ◽  
Adiabatic Shear ◽  
Interstitial Free ◽  
Adiabatic Shear Bands ◽  
Microstructural Investigation ◽  
Interstitial Free Steel
Sign in / Sign up

Export Citation Format

Share Document