Laser additive manufacturing of grade 91 steel for affordable nuclear reactor components
Автор: Additive Manufacturing and Welding
Загружено: 2022-11-09
Просмотров: 476
00:00 Introduction
01:21 Outline
01:56 Background
03:32 Project plan
05:28 Recent results/tempering
07:44 Model development
10:11 Samples/microstructure
12:08 Summary and future work
Grade 91 ferritic/martensitic steel is a promising structural or cladding material for various nuclear reactor applications. The main objective of this project is to develop a method and process model that provides in-situ tempering of Grade 91 radiation-tolerant steel during laser additive manufacturing (LAM). A second objective involves the fabrication of a subscale grid spacer prototype for fast reactors using LAM. Here, grade 91 was fabricated via the Directed Energy Deposition Laser technique. This alternative manufacturing process potentially enables tailoring of the mechanical properties through increased control of the microstructure of the product. Aimed at linking fabrication to performance via defining the process-structure-property relationships, the current research includes mechanical testing using microhardness, tensile, and in-situ nanoindentation hardness, coupled with electron diffraction-based microstructure characterization.
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