Fatigue analysis microstructure

There are a number of indicators of fatigue damage that have attracted interest in the literature. During the life of a component subjected to fatigue, the material can exhibit changes in modulus, permanent offset strain, shape of the hysteresis loops, and temperature rise of the specimen surface. Direct evidence of matrix crack density can be obtained by surface replication, while a more detailed analysis of microstructural damage requires scanning electron microscopy (SEM). 

The research content of the Data Base and Life Prediction project element includes (1) experimental life testing and microstructural analysis of SijjN and SiC ceramics, (2) time-temperature strength dependence of SijN ceramics, and (3) static fatigue behavior of PSZ ceramics. 

Thus, as follows from mentioned above, the data on corrosion fatigue of Mg alloys are very contradictory. The present research is devoted to the correlation analysis of corrosion fatigue behavior of diecast and extruded Mg alloys in 3.5% NaCl (pH 5) and 0. IN Na2B407 solution with a stable pH of 9.3 (buffer solution) and to the investigation of fatigue fracture mechanisms of these alloys depending on chemical composition, e.g, A1 content, environment and microstructure. 

S. Kang, et al.. The Microstructure, Thermal Fatigue, and Failure Analysis of Near-Ternary Eutectic Sn-Ag-Cu Solder Joints, Mater. Trans., Vol 45 (3), 2004, p 695-702... 

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