Experimental and Numerical Investigation of Hot Extruded Inconel 718

Inconel 718 is a widely used superalloy, due to its unique corrosion resistance and mechanical strength properties at very high temperatures. Hot metal extrusion the most forming technique, if manufacturing of slender components required. As current scientific literature does not comprehensively cover fundamental aspects related process–structure relationships, in present work, combined numerical experimental approach employed. A finite element (FE) model was established answer three key questions: (1) predicting required force different speeds; (2) evaluating influence main processing parameters on formation surface cracks using normalized Cockcroft Latham’s (nCL) damage criterion; (3) quantitatively assessing amount recrystallized microstructure through Avrami’s equation. For sake modeling validation, several investigations were carried out under conditions. Particularly, it found that higher initial temperature billet, lower force, although trade-off must be sought avoid occurring excessive temperatures, while limiting payload. The speed also plays relevant role. Similarly role temperature, an optimal value identified minimize possibility crack (high speeds) melting intergranular niobium carbides (low speeds).