Effects of Impressed-Current on Sensitivity of Adiabatic Shear of TC6 Titanium Alloy

2013 ◽  
Vol 718-720 ◽  
pp. 107-111
Author(s):  
Kun Sun ◽  
Kai Hua Yue ◽  
Yuan Xu ◽  
Wen Li Xiang ◽  
Wei Zhong
Keyword(s):  
Titanium Alloy ◽  
High Strain Rate ◽  
Strain Rate ◽  
Room Temperature ◽  
High Strain ◽  
Adiabatic Shear Band ◽  
Dynamic Compression ◽  
Adiabatic Shear ◽  
Split Hopkinson ◽  
Impressed Current

Dynamic compression test on TC6 titanium alloy samples have been done by using a split Hopkinson bar process and extra circuit under conditions of room temperature and high strain-rate. The effect of impressed-current on sensitivity of adiabatic shear of TC6 titanium alloy has been studied. It is shown that the impressed-current can reduce the sensitivity of adiabatic shear of TC6 titanium alloy under the condition of high strain-rate. Free electron in the samples will do direct move and take heat away from high localized area to decrease the effect of the heat. The result will help to delay formation of the adiabatic shear band. So, that is reducing the sensitivity of adiabatic shear of TC6 titanium alloy.

Mechanisms of Grains Refining in Adiabatic Shear Band of Titanium Alloy

2012 ◽  
Vol 562-564 ◽  
pp. 312-317
Author(s):  
Kun Sun ◽  
Yuan Xu ◽  
Jin Hao Liu
Keyword(s):  
Titanium Alloy ◽  
Electron Microscope ◽  
Shear Band ◽  
Dynamic Recrystallization ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Adiabatic Shear Band ◽  
Optical Microscope ◽  
Adiabatic Shear

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.

scholarly journals Adiabatic shear band localization in an Al–Zn–Mg–Cu alloy under high strain rate compression

2020 ◽  
Vol 9 (3) ◽  
pp. 3977-3983 ◽  
Author(s):  
Muhammad Abubaker Khan ◽  
Yangwei Wang ◽  
Ghulam Yasin ◽  
Faisal Nazeer ◽  
Abdul Malik ◽  
...  
Keyword(s):  
Shear Band ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Adiabatic Shear Band ◽  
Adiabatic Shear ◽  
Cu Alloy ◽  
Strain Rate Compression ◽  
Shear Band Localization

Understanding of adiabatic shear band evolution during high-strain-rate deformation in high-strength armor steel

2020 ◽  
Vol 845 ◽  
pp. 155540 ◽  
Author(s):  
Min Cheol Jo ◽  
Selim Kim ◽  
Dae Woong Kim ◽  
Hyung Keun Park ◽  
Sung Suk Hong ◽  
...  
Keyword(s):  
Shear Band ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Adiabatic Shear Band ◽  
High Strength ◽  
Adiabatic Shear ◽  
High Strain Rate Deformation ◽  
Armor Steel

scholarly journals High strain-rate dynamic compressive behavior and energy absorption of distiller’s dried grains and soluble composites with paulownia and pine wood using a split Hopkinson pressure bar technique

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 9444-9461
Author(s):  
Damian Stoddard ◽  
Suman Babu Ukyam ◽  
Brent Tisserat ◽  
Ivy Turner ◽  
Rowan Baird ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Energy Absorption ◽  
High Strain ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Compression ◽  
Rate Sensitivity ◽  
Hopkinson Pressure Bar ◽  
Split Hopkinson ◽  
Pressure Bar

Novel bio-based composite wood panels (CWPs) that consisted of distiller’s dried grains and solubles (DDGS) flour adhesive bound to a wood filler/reinforcement were subjected to high strain-rate compression loading, and their behavior was investigated. Specimens of DDGS-Paulownia wood (PW) or DDGS-pinewood (Pine) composites made using DDGS with fractions of 10%, 15%, 25%, and 50% were tested at high strain-rates using a modified compression Split Hopkinson Pressure Bar (SHPB). Both DDGS-PW and DDGS-Pine composites displayed strain-rate sensitivity, and DDGS-PW had a 25% fraction, which showed the highest ultimate compressive strength of 655 MPa at approximately 1600/s. The 90%-PW had the highest specific energy of 19.24 kJ/kg at approximately 1600/s when loaded via dynamic compression. The CWPs constructed of DDGS-PW had higher strength and energy absorption than DDGS-Pine with the exception of the 50% DDGS composites.

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