|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||Process Window Optimization for Powder Bed Additively Manufactured Molybdenum
||Mustafa Megahed, Wolfgang Ottow, Amanda Field, Luke N Carter, Moataz Attallah, Michael Gorley, Michael Porton
|On-Site Speaker (Planned)
Molybdenum is interesting for nuclear fusion applications. It provides high temperature structural strength for in-vessel components that must withstand prolonged thermal, mechanical and irradiation loads. Powder bed additive manufacturing offers the possibility to achieve high performance concept geometries previously unattainable through traditional manufacturing routes. This paper focusses on the identification of an optimal processing window. Experiments performed using a variety of powders from different suppliers are supported by numerical models resolving the coating process, the laser powder interaction and material consolidation. Numerical models validated for nickel and titanium alloys are applied to Molybdenum to verify their applicability to refractory material analysis.
Maximum component density of 97.5% was achieved using a linear energy density of 0.75 J/mm. There was little variation in results between powders tested. Directional cracking along the build direction was improved by varying build parameters.
||Planned: Supplemental Proceedings volume