DMLM can be very efficient and effective through practices uncommon to conventional manufacturing techniques, thus causing concern around the reliability and consistency of mechanical properties for additive metal parts. Stratasys Direct Manufacturing previously studied the response of room temperature tensile properties in IN625 produced on seven EOS M280 machines of the course of eight consecutive months. The results were reported a level of material consistency previously unpublished by industry. However, skeptics continue to claim additive is uncontrolled and produced wide variation of mechanical and material properties especially at elevated temperatures. This skepticism is largely driven by the through that powder reuse, or recycling, manifests itself into poor mechanical properties. This study investigates the response of elevated tensile properties of both IN625 and IN718. Although both materials are nickel based super alloys these two similar metals obtain their strength differently. IN625 is a solid solution strengthened alloy, while IN718 is a precipitation strengthened alloy.
- Describe the performance of additive manufactured INC625 and INC728 at elevated temperatures.
- Demonstrate direct metal laser melting’s ability to produce real production components that can operation in harsher, high temperature, environments.
- List the steps necessary to overcome objections to adopting DMLM’s as a production technology.