Possible applications of Additive Manufacturing (AM, and, principally, Laser Additive Manufacturing, LAM) and the potentialities of High Entropy Alloys in the nuclear field

The presentation proposes an overview of the possible applications of Additive Manufacturing (AM, and, principally, Laser Additive Manufacturing, LAM) and the potentialities of High Entropy Alloys in nuclear field. In the first part, the history, the context of AM, and the potentialities for nuclear applications are presented. A particular attention is given to laser cladding and powder bed fusion. A global review of ongoing projects in the field is proposed and, finally, ongoing activities at CEA/DES in additive manufacturing are described. Finally, the results obtained on 316L and other materials and the challenges for LAM related to the functional properties of LAMed materials (mechanics, corrosion, irradiation) are discussed. The second part of the presentation is aiming to present the opportunities of the recent research field on High Entropy/ Complex Composition Alloys globally and for nuclear applications. We introduce the HEA/CCAs, the different families of HEA/CCAs, and, as example, present results obtained at CEA/DES on the development of a CCA as cobalt-free hardfacing material for wear resistance.