.T2/QBe <sub> 2 </ Sub> Explosive Compound Interface Layer Within The Deformation Characteristics

Pure copper (T2) and beryllium bronze (QBe2) were selected as the material to produce T2/QBe2 composite by flat plate explosive cladding. Modern examination techniques, such as OM, EBSD and TEM were employed to investigate the plastic deformation features of T2 and QBe2 in cladding layer near the composite interface.The result indicated that the cladding layer at composite interface apperaed like continuous and cyclic waves on a macro scale. Microstructures on both sides of interface were different from those of respective matrix. There were some melted blocks or layer at the waved interface. And plastic deformation occurred concurrently along the formed interface. After explosive loading lots of parallel bands,which were identified as ASBs and deformation twins, apperaed on the side of QBe2. However, there were no ASBs on the side of T2. A number of very fine equix grains were observed in ASBs, and orientation of grains in the ASBs was different, orientatin of grains between adiabatic shear bands was essentially consistent, while there was a large difference in orientation between grains in ASBs and those in matrix. Adiabatic shearing bands would be one of special ways of plastic deformation for QBe2 under explosive loading. Deformation twins are found in the both T2 and QBe2 after explosive loading, which suggested that twinning was a favorable deformation mechanism under such condition. After recrystallization annealing, the ASBs in the QBe2 disappeared, and annealing twins occurred. Grains in T2 coarsened and annealing twins appeared.