title: In-vitro characterization of stress corrosion cracking of aluminium-free magnesium alloys for temporary bio-implant applications.
abstract: The complex interaction between physiological stresses and corrosive human body fluid may cause premature failure of metallic biomaterials due to the phenomenon of stress corrosion cracking. In this study, the susceptibility to stress corrosion cracking of biodegradable and aluminium-free magnesium alloys ZX50, WZ21 and WE43 was investigated by slow strain rate tensile testing in a simulated human body fluid. Slow strain rate tensile testing results indicated that each alloy was susceptible to stress corrosion cracking, and this was confirmed by fractographic features of transgranular and/or intergranular cracking. However, the variation in alloy susceptibility to stress corrosion cracking is explained on the basis of their electrochemical and microstructural characteristics.
authors: Department of Mechanical and Aerospace Engineering, Monash University, VIC 3800, Australia; Department of Materials Engineering, University of British Columbia, Vancouver V6T1Z4, Canada.
authors: Lokesh
authors: L
authors: Choudhary
authors: Department of Mechanical and Aerospace Engineering, Monash University, VIC 3800, Australia; Department of Chemical Engineering, Monash University, VIC 3800, Australia. Electronic address: Raman.Singh@monash.edu.
authors: R K
authors: RK
authors: Singh Raman
authors: Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.
authors: Joelle
authors: J
authors: Hofstetter
authors: Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.
authors: Peter J
authors: PJ
authors: Uggowitzer
mesh_terms: D000497:Alloys / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D001826:Body Fluids; D003343:Corrosion; D004566:Electrodes; D006801:Humans; D008274:Magnesium / Q000737:chemistry*; D008422:Materials Testing / Q000295:instrumentation / Q000379:methods*; D008954:Models, Biological; D019736:Prostheses and Implants
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; D008274:Magnesium
keywords: Magnesium alloys; Scanning electron microscopy; Slow strain rate tensile testing; Stress corrosion cracking; Temporary implants