Authors:
Faraz Deirmina (Siemens Energy, Sweden),
Slawomir Koenig (Siemens Energy, Sweden),
Eva Oscarsson (Siemens Energy, Sweden),
Lennart Johansson (Siemens Energy, Sweden),
Olutayo Adegoke (Siemens Industry Software GmbH, Sweden)
Abstract:
HastelloyX is one of the most common materials used in powder bed fusion-laser beam (PBF-LB) to fabricate components operating at elevated temperatures. Boron is a key element in enhancing the creep properties of superalloys at high temperatures, however, similar to the welding practice, boron might impose a negative effect on the printability. In the present work, the influence of boron on stress-rupture behavior of a modified low carbon HastelloyX variant was studied. Powders with boron contents varying from 2 to ~20 ppm were used to fabricate the samples. Time to rupture, elongation, and reduction of area were obtained from isothermal stress rupture tests performed at 816°C with static load of 103MPa. In view of the fracture mechanism, and the stress-rupture test results, it can be concluded that increasing the boron content while decreasing the total grain boundary area of the printed material improves time-to-rupture during isothermal stress-rupture test.
DOI:
https://doi.org/10.59499/WP225372119