Micromechanism and Failure Analysis of INCONEL601.

This paper presents an investigation of engineering failure modes for INCONEL601 tested after exposure to annealed heat-treatment (1.5 hour duration) and as received prior to annealing. Microstructural and failure surfaces were tested for chemical composition and examined by metallographic techniques and fatigue fractography. Scanning electron microscopy and enginery dispersive spectroscopy (SEM-EDS) revealed the presence of voids, dimples, and striations associated with fatigue crack propagation. The microstructural characterization of annealed INCONEL601 is notable for triangular voids that congregate along grain boundaries in contrast to the as received INCONEL601. In addition, the tensile and fatigue strengths of as-received samples were greater than annealed heat-treated INCONEL601. [ABSTRACT FROM AUTHOR]