Evaluating the stress corrosion cracking susceptibility of Mg–Al–Zn alloy in modified-simulated body fluid for orthopaedic implant application

Ratcheting and low-cycle fatigue characterizations of extruded AZ31B Mg alloy with and without corrosive environment

“…Since magnesium alloys had been widely used as implant materials within bones or blood vessels [18][19][20], the synergetic effect of electrochemical corrosion and cyclic mechanical loading, i.e. corrosion fatigue, needed to be taken into account.…”

Appropriate Mechanochemical Conditions for Corrosion-Fatigue Testing of Magnesium Alloys for Temporary Bioimplant Applications

“…CF and SCC studies on Mg alloys for bioimplant applications [11][12][13][14]16 have been carried out by employing common and relatively simplistic approaches to the mechanical loading, test environment, and test alloys. The in vitro testing parameters such as frequency and mode of loading, chemistry of the test solutions, and geometry of the specimens in these studies were considerably different from those under actual in vivo conditions.…”

“…CF and SCC will be a serious concern for implant devices of Mg alloys since (I) common temporary implant devices have sharp contours and (II) Mg alloys readily suffer pitting in chloride solutions, 9,10 including in human body fluid. [11][12][13][14] As pits are the most common initiators of CF and SCC, Mg alloys can be susceptible to CF and SCC in a chloride environment, 15 such as body fluid. [11][12][13][14]16,17 It is also important to note that if the fatigue performance of the alloys is to be evaluated using S-N curves, as stated in ASTM standard E466-96, then ''care should be taken with respect to the surface preparation to ensure that improper methods of 18 If, on the other hand, the evaluation were to be carried out on the basis of da/dN versus DK relationship, then the tests should be performed as per Appendix X3 of ASTM standard E647-13a.…”

Effect of Microstructure Factors on Stress Corrosion Behavior of Mg<i>-x</i>Sn Alloys (<i>x</i> = 2, 5, 8 mass%)

“…Because many applications related to automobiles and biomedicine often involve stress under corrosion environments [22][23][24] , the stress corrosion cracking (SCC) behaviors of Mg alloys are an important consideration 25,26) . Various methods of stress corrosion testing have been developed, including the slow strain rate test 27) and the bent-beam stress corrosion test 28) .…”