46 - Influence of defect shape and position on the High Cycle Fatigue behaviour of additively manufactured Ti-6Al-4V alloy
Abstract
The presence of process induced defects in parts produced by Laser Powder Bed Fusion (L-PBF) is today a well-known issue. It is therefore crucial to account for the defects when designing additively manufactured components against fatigue. To address this question Ti-6Al-4V samples with different defect populations have been produced by varying the process parameters. These defect populations have been characterized using X-ray tomography, while the samples have been subjected to uniaxial fatigue testing (R=-1). The results have demonstrated the detrimental impact of lack-of-fusion defects as compared to the gas pores for the case of surface crack initiation. In addition, the control of the distance between the defective areas and the surface of the samples allowed for the investigation of the criticality of internal defects. The establishment of a Kitagawa diagram for internal defects highlighted that the criticality of internal defects does not depend on the defect type, as opposed to surface defects.
Speaker
Matthieu Bonneric
Discover speaker profileArts et Métiers Institute of Technology, Talence, France
Conference
46 - Influence of defect shape and position on the High Cycle Fatigue behaviour of additively manufactured Ti-6Al-4V alloy
Date/Time
20/03/2024
11:15 am -11:35 am
Location
Room 7