MICROSTRUCTURE-BASED CHARACTERIZATION OF THE CYCLIC DEFORMATION BEHAVIOR OF FRICTION DRILLED INTERNAL THREADS IN ALUMINIUM AND MAGNESIUM ALLOYS ALSI10MG, AZ31 AND AZ91

摘要

Microstructure-based characterization of mechanical properties of aluminium AlSi10Mg and magnesium AZ31 and AZ91 internal threads in thin-walled profile specimens was carried out using tensile tests and fatigue tests in tensile loading range. The internal threads were chipless manufactured by means of friction drilling and thread forming. Variations in the geometric process parameter wall thickness were compared. Differences in maximum tolerable loads and fatigue limits were correlated with the production-related profile qualities and changes in microstructure.