What is a Campfire Meeting?

  • A small in size but large in content, relaxed meeting to discuss a particular topic for 30 minutes
  • Led by a facilitator, participants discuss the topic organically to drive the discussion
  • Opportunity to share expertise

Why Should I Participate?

  • Knowledge share
  • Problem solving
  • Advanced networking

Scheduled Campfire Meetings

Campfire Meeting 1: Additive Manufacturing: Best Practices in Metal Powder Qualification and Recycling

Monday 14 October 2019 Room: 2.9/2.10 16:00 - 16:30

Facilitator: Eleonora Santecchia (INSTM - Università Politecnica delle Marche)

The quality of metal powders for additive manufacturing is a key factor to ensure repeatability and reliability of these manufacturing processes. Many institutions and companies apply their own internal standards to check the quality of virgin and recycled metal powders, and they follow different procedures to ensure consistent mechanical and microstructural properties of the final parts. It would be useful to make a comparison between different standards and work towards a common best practice.

Campfire Meeting 2: Which Powder Flow Property is Most Useful for Metal AM Process?

Tuesday 15 October 2019 Room: 2.7/2.8 16:00 - 16:30

Facilitator: Filip Francqui (Granutools)

We hear often from users what they check but we should challenge them about the relevance of the measurement. A measurement is relevant if it tells you something useful for your process.
The metal AM community agrees that Hall and Carney flowmeters are not discerning tests for spreadability. What should we use instead?
Sphericity is usually taken as a way to guarantee good spreadability. Sphericity has drawbacks especially when it comes to density. Plus the fact that a powder that spreads well is also more likely to be affected by the laser.

Campfire Meeting 3: Non-Uniform and Non-Steady State Temperatures in Sinter Furnaces

Tuesday 15 October 2019 Room: 2.9/2.10 16:00 - 16:30

Facilitator: Dr. Goetz Hartmann (MAGMA GmbH)

A controlled, efficient sinter process requires uniform temperatures, which should be constant at least during some phases of the sinter processes. But the geometric arrangement of heating devices and sinter parts as well as heating up and cooling phases lead to non-uniform and non-steady state furnaces temperatures. Are they relevant? Is online sinter part temperature control helpful and feasible (sintering 4.0)? What about sinter furnace temperature simulation and virtual optimization?

Campfire Meeting 4: Porosity Formation in Additively Manufactured Metal Alloys

Wednesday 16 October 2019 Room: 2.7/2.8 09:30 - 10:00

Facilitator: Laura Cordova (University of Twente)

Porosity formation is one of the main challenges when producing AM metal parts. During laser powder bed fusion (L-PBF) process, porosity can be formed due to process irregularities as well as contamination. Pores can act as stress concentrators and lead to failure. During this discussion, an exchange of experiences of porosity formation is proposed. What type of pores are formed during L-PBF process? Which parameters are usually having the larger impact on porosity formation? How to avoid L-PBF pores?
The participants will have the opportunity to discuss issues observed with different materials, machines and combination of process parameters. In addition, a discussion covering pore elimination practices such as drying the powder and powder bed heating, among others will be carried out.
Finally, a list of best practices from first experiences and publications about the main drives of pore formation, elimination and monitoring/ control will be done as output of the meeting.

Campfire Meeting 5: Advancements in Field Assisted Sintering Techniques

Wednesday 16 October 2019 Room: 2.9/2.10 09:30 - 10:00

Facilitator: Alessandro Fais (EPoS Srl)

Opportunities, difficulties and advantages in the use of field assisted sintering technologies on novel products and large scale productions.

Campfire Meeting 6: Non-Destructive Testing of Sintered Parts in Production

Wednesday 16 October 2019 Room: 2.7/2.8 12:00 - 12:30

Facilitator: Michael Weidner (Siemens Industry Software GmbH)

- Which NDT method might be an appropriate solution to which task?
- The pros and cons of acoustic resonance testing (ART)

Campfire Meeting 7: Tumbling Process for as Molded MIM Parts: Influence of Parts Geometry and Feedstock

Wednesday 16 October 2019 Room: 2.9/2.10 12:00-12.30


For some parts in order to have process cost reduction it is interesting to proceed the step of corner rounding and deburring (tiny burrs) by tumbling in the as molded condition instead of in the as sintered condition. To proceed in this way and get positive results which process conditions and feedstock have to be fullfilled?


Camp Fire