When making parts via the additive manufacturing process, even with the most robust processing techniques the powder bed additive process may still create small defects during the build cycle. Several investigational sample sets were manufactured via EB powder bed additive manufacturing. The sample sets contained purposely designed defects that mimic defects that might normally be found in components built via powder bed processing techniques. The investigation reports on NDT methods to detect the defects and the potential elimination of them via post build thermal processing. The investigation compares the effect of post build thermal processing (Hot isostatic Pressing and heat treatments) against as built properties. Mechanical testing data is reported to show the improved material properties by post build thermal processing. gamma X-ray data is reported and compared to metallography data to show that post build thermal processing conclusively reduces the number and size of the defects, if not eliminating them entirely.
- Understand the value of hot isostatic pressing for components built via the AM process
- Understand the improvement in mechanical properties the hot isostatic pressing process provides for AM components
- Understand how potential manufacturing build defects can affect mechanical properties