【摘 要】
：
We investigate deformation and spallation of explosive welded bi-steel plates under gas gun shock loading.Free surface histories are measured to obtain the Hugo
【机 构】
：
School of Science, Wuhan University of Technology, Wuhan 430070“,”Key Laboratory of Advanced Technol
论文部分内容阅读
We investigate deformation and spallation of explosive welded bi-steel plates under gas gun shock loading.Free surface histories are measured to obtain the Hugoniot elastic limit and spall strengths at different impact velocities.Pre-and post-shock microstructures are characterized with optical metallography,scanning electron microscopy,and electron backscatter diffraction.In addition,the Vickers hardness test is conducted.Explosive welding can result in a wavy steel/steel interface,an ultrafine grain region centered at the interface,and a neighboring high deformation region,accompanied by a hardness with the highest value at the interface.Additional shock compression induces a further increase in hardness,and shock-induced deformation occurs in the form of twinning and dislocation slip and depends on the local substructure.Spall damage nucleates and propagates along the ultrafine grain region,due to the initial cracks or weak interface bonding.Spall strengths of bimetal plates can be higher than its constituents.Plate impact offers a promising method for improving explosive welding.
其他文献
We experimentally study the spin exchange collision in ultracold 40K Fermi gases.The quadratic Zeeman shift,trap potential and temperature of atomic cloud will
随着我国人民生活水平的提高,电视机普及到千家万户,报纸、电视、广播、杂志四大传播媒介的广告业,座次发生变化。一向雄居霸主地位的报纸广告业,1991年被后来居上的电视广
From 1540 inelastic interactions of 3.7A GeV 16O projectile with emulsion nuclei,we select samples of 87 and 61 events carefully due to interactions of neutron
We propose an effective mechanism to couple superconducting charge and flux qubits by using a quantized nanomechanical resonator.The coupling between the charge
40K is one of the most important atomic species for ultra-cold atomic physics.Due to the extremely low concentration (0.012％) of 40K in natural abundance of pota
Lorentz force electrical impedance tomography (LFEIT) inherits the merit of high resolution by ultrasound stimulation and the merit of high contrast through ele
Semi-device-independent quantum key distribution (SDI-QKD) has been proposed by applying the quantum dimension correlation,and the security relies on the violat
Fano-like quantum routing of single photons in a system with two waveguides coupled to two collocated atoms is investigated theoretically.Using a full quantum t
草莓是多倍体植物,不同倍性(2x、4x、6x、8x、10x)的种质资源在自然界中广泛存在。野生草莓作为栽培草莓抗病、抗逆、改良性状的重要基因库,育种实践中常常将栽培草莓与野生
近年来,消费者普遍对市场上出售的番茄风味感到不满,要求提高番茄风味品质,基于此现状,本试验以番茄‘佳粉15号’为试验材料,采用日本山崎番茄改良配方进行营养液栽培,研究了