Neutron diffraction residual stress determinations in Fe3Al based iron aluminide components fabricated using wire-arc additive manufacturing (WAAM)

Authors

Chen Shen, Shanghai Jiao Tong UniversityFollow
Mark H. Reid, Australian Nuclear Science and Technology OrganisationFollow
Klaus-Dieter Liss, Australian Nuclear Science and Technology Organisation, Israel Institute of Technology, University of WollongongFollow
Zengxi Stephen Pan, University of WollongongFollow
Yan Ma, University of WollongongFollow
Dominic Cuiuri, University of WollongongFollow
Stephen van Duin, University of WollongongFollow
Hui Jun Li, University of WollongongFollow

RIS ID

137075

Publication Details

Shen, C., Reid, M., Liss, K., Pan, Z., Ma, Y., Cuiuri, D., van Duin, S. & Li, H. (2019). Neutron diffraction residual stress determinations in Fe3Al based iron aluminide components fabricated using wire-arc additive manufacturing (WAAM). Additive Manufacturing, 29 100774-1-100774-8.

Abstract

The Wire-Arc Additive Manufacturing (WAAM) process is an increasingly attractive method for producing porosity-free metal components. However, the residual stresses and distortions resulting from the WAAM process are major concerns as they not only influence the part tolerance but can also cause premature failure in the final component during service. The current paper presents a method for using neutron diffraction to measure residual stresses in Fe₃Al intermetallic wall components that have been in-situ additively fabricated using the WAAM process with different post-production treatments. By using averaging methods during the experimental setup and data processing, more reliable residual stress results are obtained from the acquired neutron diffraction data. In addition, the present study indicates that the normal residual stresses are significant compared to normal butt/fillet welding samples, which is caused by the large temperature gradient in this direction during the additive layer depositions.