Evaluation of the Fatigue Behavior and Failure Mechanisms of 4340 Steel Coated with WIP-C1 (Ni/CrC) by Cold Spray
Viorel Goanță,
Corneliu Munteanu,
Sinan Müftü,
Bogdan Istrate,
Patricia Schwartz,
Samuel Boese,
Gehn Ferguson,
Ciprian-Ionuț Morăraș,
Adrian Stefan
Affiliations
Viorel Goanță
Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania
Corneliu Munteanu
Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania
Sinan Müftü
Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA
Bogdan Istrate
Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania
Patricia Schwartz
Kostas Research Institute, Northeastern University, Burlington, MA 01803, USA
Samuel Boese
Kostas Research Institute, Northeastern University, Burlington, MA 01803, USA
Gehn Ferguson
Army Research Laboratories, Aberdeen Proving Ground, Maryland, MD 21005, USA
Ciprian-Ionuț Morăraș
Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania
Adrian Stefan
Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania
Fatigue behavior of standardized 4340 steel samples uniformly coated with WIP-C1 (Ni/CrC) by cold spray was investigated. In particular, when a crack appeared at the interface between the base material and the coating, the cause of it as well as its shape and size were investigated. Fatigue loading was applied by alternating symmetrical cycles. Scanning electron microscopy was used to study the onset of failure and the subsequent propagation of cracks. The interface between the two materials performed well—in all samples, the initial crack propagation occurred on the surface of the base material, continuing into the coating material and in the interior of the base material. The fatigue durability curve of stress vs. number of cycles (S-N) presented a conventional form for a metallic alloy and the coating material had an influence only on the damage on the surface of the base material.