Authors:
Solange Vives (Aubert & Duval, Spain),
Charlotte Mayer (Aubert & Duval, France),
Guilhem Martin (Université Grenoble Alpes, CNRS, Grenoble INP, SIMaP, France),
Muriel Veron (Université Grenoble Alpes, CNRS, Grenoble INP, SIMaP, France),
Jean Jacques Blandin (Université Grenoble Alpes, CNRS, Grenoble INP, SIMaP, France)
Abstract:
While superalloys such as IN718 have been successfully used to build complexe parts in AM, applications requiring higher service temperatures necessitate the development of alloys with increased capability. AD730® was developed as a C&W alloy with increased capability relative to wrought IN1718.This work first reveals the impact of minor elements B and Zr on LPB-F processed AD730® (promotion of solidification cracking), and the role of B regarding rupture creep resistance.The as built microstructure is completely different from the as forged alloy. This work shows how heat treatment allows to tune the microstructure to address either high fatigue and mechanical resistance, or better creep needs. Compared to AM IN718, AM AD730® shows the desired improvement in temperature capability, analogous to that in the forged version. Still, differences between AM and cast and wrought AD730® are attributable to differences in grain size and gamma prime (?’) precipitates distribution.
DOI:
https://doi.org/10.59499/WP225371435