Comparison of impact crater shape and splat of various targets for estimating projectile velocity

Tuesday, May 12, 2015: 11:10 AM
Room 102B (Long Beach Convention and Entertainment Center)
Dr. Kazunori Sakata , Fujikikosan Corporation, Kitakyushu, Japan
Mr. Koji Tagomori , Fujikikosan Corporation, Kitakyushu, Japan
Mr. Naoki Sugiyama , Fujikikosan Corporation, Kitakyushu, Japan
Mr. Daisuke Oka , Fujikikosan Corporation, Kitakyushu, Japan
Mr. Yasuhiro Shinya , Fujikikosan Corporation, Kitakyushu, Japan
Mr. H Sasaki , NAC Image Technology Inc.,, Tokyo, Japan
Prof. Yasuhiro Akahoshi , Kyushu Institute of Technology, Kitakyushu, Japan
Mr. K Norimatsu , Kyushu Institute of Technology, Kitakyushu, Japan
Mr. Yosuke Fujimura , Kyushu Institute of Technology, Kitakyushu, Japan
Mr. Yuki Fukuda , Kyushu Institute of Technology, Kitakyushu, Japan
Mr. T Koura , Kyushu Institute of Technology, Kitakyushu, Japan
In order to clarify the bonding mechanism and to control the quality of cold sprayed coatings, it is necessary to accurately measure in-flight velocity and impact velocity of a projectile. In this study, in-flight velocity of an aluminum alloy (A2017) sphere with 1 mm in diameter was about 1km/s which was provided by a small two-stage light gas gun and was measured by a laser-cut velocity measurement technique. In order to estimate the impact velocity of the projectile, the projectile was made to collide against targets made of aluminum (A1015), copper (C1012), mild steel (SPCC) and stainless steel (SUS304). After the impact tests, impact crater shape of the targets was measured using SEM-EDS and a laser microscope. The impact velocity of a projectile was estimated from obtained crater depth of the targets. In addition, microstructures of the interface between projectile and target were analyzed by EPMA, EBSD and TEM.
See more of: Cold Spray: Simulation and Particle Impact
See more of: Fundamentals/R&D