A Constitutive Modeling and Experimental Effect of Shock Wave on the Microstructural Sub-strengthening of Granular Copper

作     者：A.D.Sharma A.K.Sharma N.Thakur 

作者机构：Department of PhysicsGovernment College ChowariChamba176302India Om Sterling Global University-HisarHaryana125001India Department of PhysicsHimachal Pradesh UniversityShimla171005India 

出 版 物：《Journal of Metallic Material Research》 (金属材料研究（英文）)

年 卷 期：2021年第4卷第1期

页      面：19-25页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Defence Research and Development Organization(DRDO),India,for Grant-in-aid Project No.ERIP/ER/0703665/M/01/1044 the University Grants Commission(UGC-New Delhi),India,for providing Research Fellowship No.F.4-1/2006(BSR)/11-08/2008 

主　　题：Shock waves Wide angle x-ray diffraction Microstructure FE-SEM Laser diffraction Microhardness 

摘      要：Micro-sized copper powder(99.95%;O≤0.3)has been shock-processed with explosives of high detonation velocities of the order of 7.5 km/s to observe the structural and microstructural *** shock-consolidation technique has been used to obtain conglomerates of granular *** technique involves the cylindrical compaction system wherein the explosive-charge is in direct proximity with the powder whereas the other uses indirect shock pressure with die-plunger *** simulations have been performed on with Eulerian code *** simulated results show a good agreement with the experimental observation of detonation parameters like detonation velocity,pressure,particle velocity and shock pressure in the reactive media.A pin contactor method has been utilized to calculate the detonation pressure *** angled x-ray diffraction studies reveal that the crystalline structure(FCC)of the shocked specimen matches with the un-shocked *** emissive scanning electron microscopic examination of the compacted specimens show a good sub-structural strengthening and complement the theoretical *** diffraction based particle size analyzer also points towards the reduced particle size of the shock-processed specimen under high detonation ***-hardness tests conducted under variable loads of 0.1 kg,0.05 kg and 0.025 kg force with diamond indenter optical micrographs indicate a high order of micro-hardness of the order of 159 *** pycnometry used for the density measurement of the compacts shows that a compacted density of the order of 99.3%theoretical mean density has been achieved.