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Home » News

Senvol Demonstrates Machine Learning Approach to Material Allowables

News By AM Chronicle EditorSeptember 2, 20235 Mins Read
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Senvol recently demonstrated a machine learning approach to material allowables development that was shown to be more flexible, cost-effective, time-effective, and equivalent to the conventional (in this case, MMPDS) approach to material allowables development.

The work was done as part of a U.S. Government contract W911NF-20-9-0009 that Senvol had been awarded to apply its machine learning software, Senvol ML , to enable a path to rapid development of material property allowables for additive manufacturing (AM).

Senvol’s partners on the program included EWI and Pilgrim Consulting. Battelle and Lockheed Martin Fellow, Hector Sandoval, also served as technical advisors on the program. The contract was administered by the National Center for Manufacturing Sciences (NCMS) through the AMMP Other Transaction Agreement (OTA) program.

As part of the program, Senvol demonstrated a new approach to material allowables development that leverages machine learning. A machine learning approach is extremely flexible and able to handle any change to the AM process, which makes this approach ideal for sustainment in the long-term. The program focused on demonstrating the approach using a 17-4 PH Stainless Steel material processed via a powder bed fusion AM machine.

“Material allowables development is a very expensive and time-consuming endeavor” said Annie Wang, President at Senvol. “Senvol’s program was very successful in demonstrating a new approach to additive manufacturing allowables development that leverages machine learning. We were very pleased with the results and look forward to continued work in this cutting edge area.”

AM is starting to enable lightweight and rapidly produced designs that are revolutionary to various defense and commercial capabilities and applications. These benefits cannot yet be fully realized due to the time and high cost of allowables development.

The high cost stems in large part from the fact that material allowable development requires an enormous amount of empirical data to be generated, at a fixed processing point, meaning that all of the empirical data must typically be regenerated from scratch every time there is a major change in the process. This results in an AM process that is not only costly and time-consuming to implement the first time, but costly and time-consuming to maintain in the long-run when there are inevitably changes to the AM process.

Hector Sandoval, who reviewed the AMMP program technical approach and test results, adds, “I have experience developing material allowables using traditional methodologies. The current process works well, but there are some limitations. It was exciting to support the AMMP program by reviewing the technical approach, test results, and final presentation. It was great to get a first-hand look at the potential of leveraging a machine learning based approach to help establish material allowables.”

Senvol ML  software supports the qualification of AM processes and was used in the program to develop statistically substantiated material properties analogous to material allowables. Furthermore, it did so while simultaneously optimizing data generation requirements. Important to note is that the software is flexible and can be applied to any AM process, any AM machine, and any AM material. Also of note is that this project did not develop true allowables. Due to budget and programmatic constraints, the project team had to make several simplifying decisions.

Senvol President Zach Simkin comments, “The use of machine learning for additive manufacturing process and material development is very mature. This has been adopted by industry and is the low-hanging fruit. The use of machine learning specifically for material allowables development, however, is still a work in progress. I’m pleased that we have now made two successful demonstrations of the machine learning approach to allowables – once in this program using a metal alloy and comparing to MMPDS, and once in a prior program funded by America Makes that used a polymer material and compared to CMH-17 – but more research is needed. The upside is tremendous, and we look forward to continuing to partner with the Government and industry to advance work in this area.”

Dr. William E. Frazier, retired Chief Scientist for Air Vehicle Engineer at NAVAIR / The Navy Senior Scientist for Material Engineering, and currently President of Pilgrim Consulting LLC, adds, “I was very pleased to join Senvol’s team for this program. Senvol’s machine learning-enabled approach directly addresses a major industry challenge: the rapid and cost-effective development of additive manufacturing material property allowables. I have been involved with the qualification of several additive manufacturing processes and materials for flight, and in my opinion, the further development of this technology will have a positive impact on the cost, schedule, and performance of both defense and commercial platforms.”

Users of the Senvol ML software include organizations in aerospace, defense, oil & gas, consumer products, medical, and automotive industries, as well as AM machine manufacturers and AM material suppliers.

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3d printing additive manufacturing machine learning Materials Metal Additive Manufacturing Navy Senvol USA
AM Chronicle Editor

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