Author:

Keywords:

Science & Technology, Technology, Materials Science, Multidisciplinary, Metallurgy & Metallurgical Engineering, Materials Science, Additive manufacturing, Selective laser melting, Iron scaffold, Corrosion fatigue, Biodegradation, 316L STAINLESS-STEEL, CRACK INITIATION, MECHANICAL-PROPERTIES, COMPRESSION FATIGUE, DYNAMIC DEGRADATION, MAGNESIUM ALLOY, OPEN CELL, STRESS, MICROSTRUCTURE, BIOMATERIALS, 0905 Civil Engineering, 0912 Materials Engineering, 0913 Mechanical Engineering, Energy, 4005 Civil engineering, 4016 Materials engineering, 4017 Mechanical engineering

Abstract:

© 2019 Elsevier Ltd The corrosion fatigue behavior of additively manufactured topologically ordered porous iron based on diamond unit cells was studied for the first time to understand its response to cyclic loading in a simulated physiological environment. The material exhibited high fatigue resistance with fatigue strengths being 70% and 65% of yield stress in air and revised simulated body fluid, respectively, mainly due to its slow degradation and excellent ductility. However, cyclic loading significantly increased biodegradation rate, especially at higher stress levels. The observed extraordinary fatigue strength, slow biodegradation and high ductility underline the importance of porous iron as a promising bone-substituting material.