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SEMTE | Hildreth Lab

Introducing Dr. Lefky

Congratulations to Chris on passing his Ph.D. Defense on the Corrosion and Sensitized Microstructure Evolution of 3D Printed Stainless Steel 316 and Inconel 718 Dissolvable Supports.  Chris has worked extremely hard over the last 4 years, publishing 12 manuscripts (7 first author) in topics ranging from reactive inks, to electrohydrodynamics, to the sensitization and corrosion of 3D printed metals.

We are all extremely proud of Dr. Lefky and wish him the best of luck as he starts his new job at Arconic.

DOE NEUP grant for dissolvable supports for heat exchangers just funded!

Our DOE proposal on combining our Dissolvable Support Technology with University of Pittsburg’s Prof. Albert To’s Topology Optimization just got funded.  Congratulations to the PI, Prof. To along with the rest of the Co-PI’s: myself; Dr. Wei Xiong (University of Pittsburgh); Mr. Curt Horomanski (Curtiss-Wright EMD); Ms. Robin Gourley (Curtiss-Wright EMD); Dr. Jason Goldsmith (Kennametal).

This project aims to develop and establish an innovative approach to drastically reduce development and post-processing costs associated with laser powder bed additive manufacturing (AM) of complex nuclear reactor components with internal cavities and overhangs. The proposed innovative approach integrates dissolvable supports, topology optimization, and microstructure design to achieve the project goal. Using optimally designed dissolvable supports, this research will make state-of-the-art nuclear components much cheaper, have minimal distortion, and could eliminate build failures altogether.

NASA just funded our Dissolvable Support Proposal

Our NASA-CAN proposal just got accepted.  We look forward to working with Dr. Omar Mireles at NASA’s Marshall Space Flight Center as we develop this technology to aid NASA in their mission to explore the boundaries of space!  Just a few more years and we’ll have the replicator up and running.

We won a Defense Innovation Award

Our dissolvable metal support technology received a Defense Innovation Award at the 2017 Defense Innovation Technology Acceleration Challenges (DITAC) meeting in Tampa, FL last week (Oct. 3-5).  The presentation is listed under H-Nano, the company we started to commercialize this technology.

It was a fun conference and it aways feels nice when other people/organizations say: “hey, that technology looks awesome!”  We are very happy to be considered within the top 15% of technologies showcased at this year’s DITAC.

Six Presentations at 2017 Solid Freeform Fabrication Symposium

I will be at Solid Freeform Fabrication meeting this week (August 8-12, 2017).  Below is a list of talks from our group.



Dissolvable Metal Supports Processes for Powder Bed Fusion Printed Inconel 718
Session: Materials 8: Nickel 718
Date: 08/08/2017
Time: 3:40 PM – 4:00 PM
Location: Hilton Austin – 408



Adhesion of Reactive Silver Inks on Indium Tin Oxide Films
Session: Applications 8
Date: 08/09/2017
Time: 9:00 AM – 9:20 AM
Location: Hilton Austin – 402

Dilution and Mixing for Functionally Gradient DED Printed Stainless Steel Components with Dissolvable Carbon Steel Supports
Session: Process Development 9: Metal Powder Processing
Date: 08/09/2017
Time: 11:10 AM – 11:30 AM
Location: Hilton Austin – 416A-B

Examination of Build Orientation and its Impact on 316 Stainless Steel Dissolvable Supports
Session: Process Development 10: Large Scale and Hybrid Processes
Date: 08/09/2017
Time: 2:10 PM – 2:30 PM
Location: Hilton Austin – 417A-B

Effect of Contact Angle on Reactive Ink Droplet Evolution
Session: Materials 13: Jetting and Inks
Date: 08/09/2017
Time: 4:00 PM – 4:20 PM
Location: Hilton Austin – 615A-B

Electrical Properties of Reactive Silver Inks on Indium Tin Oxide Films
Session: Materials 13: Jetting and Inks
Date: 08/09/2017
Time: 4:40 PM – 5:00 PM
Location: Hilton Austin – 615A-B