3D Printing News Briefs, November 24, 2021: 3D Printing of Steel, Glass, Skin Models and more – 3DPrint.com

In today’s 3D printing briefs, we begin with a roundtable on AM Workforce Development. Then we move on to research, first into 3D printing of better steel, and then into 3D printing of glass at the nanoscale. Finally, CTI Biotech won an award for its 3D bio-printed skin model, and the winners of the Purmundus Challenge were announced at Formnext 2021 last week.

AM Workforce Development Roundtable with Secretary of Commerce

The AM industry has grown by 30% over the past five years, but it is struggling to fill the thousands of new positions requiring technical skills. America Makes and 3D printing consulting firm 3Degrees recently led an additive manufacturing workforce development roundtable at the mHub technology accelerator, welcoming partners who are developing training across the country, including plus representatives from local and national governments, including US Secretary of Commerce Gina M. Raimondo. During the visit, everyone celebrated the completion of the Advanced Manufacturing Experience (AMx) pilot course in Chicago, an immersive AM learning program run by nonprofit 3Degrees and West Side Forward to train students aged from 22 to 50 years old on the West Side of Chicago. Several of the program participants attended the panel discussion and shared their experiences, which included tours of facilities like Renishaw and Impossible Objects, in-person instruction, mentoring relationships with Siemens Energy, EOS, Desktop Metal, Met-l -Flo, Dyndrite and Forecast3D, and take a guided tour of RAPID + TCT.

“I saw this with my own eyes as an entrepreneur running two companies that help large manufacturing organizations (eg government, aerospace, automotive) implement 3D printing technology. Said Mike Vasquez, CEO of 3Degrees. “My clients tell me time and time again that they have jobs that are well paying and eligible for benefits that they cannot fill. It seems the United States has forgotten how to train its workforce for today’s jobs that don’t require a college degree. On the other hand, finding employment in this industry is not easy. Most of these businesses are small (

Researchers 3D print better steel

A multimodal study of additively manufactured 316L stainless steel revealing a heterogeneous – and correlative – distribution of crystalline defects in bright-field transmission electron micrograph (gray scale) and alloying elements in the X-ray fluorescence map superimposed (color). Credit: Dr W. Streit Cunningham and Professor Jason Trelewicz, Stony Brook University

A team of researchers from Stony Brook University published a paper on their work developing a more corrosion-resistant 316L stainless steel material, which is often used in naval applications. The study focused on the link between corrosion behavior and material structure in 3D laser-printed 316L stainless steel, and the team used multimodal synchrotron X-ray techniques at Brookhaven’s National Synchrotron. Light Source II (NSLS-II) to find new connections between print settings and the fault state of the material; samples were printed at Penn State and correlated electron microscopy was performed at Brookhaven’s Center for Functional Nanomaterials (CFN). These research findings could help make stainless steel that is more corrosion resistant by manipulating its material defects at the nanoscale.

“The main objective of our study was to understand the corrosion behavior of additively manufactured 316L stainless steel in the context of the microstructural defects that form due to the rapid solidification rates inherent in this 3D printing process. . We show that although the uniform surface corrosion of printed 316L is similar to a traditional 316L alloy, the printed material exhibits increased susceptibility to pitting, especially in samples with the highest density of defects discovered through our synchrotron measurements. Said Jason Trelewicz, PhD. , Corresponding Author and Associate Professor of Materials Science and Engineering at the College of Engineering and Applied Sciences and the Institute for Advanced Computational Science.

Nanoscale 3D printing glass

Top left, luminaire lens. Top right, a gyroid-shaped object at different stages of the curing process in the tank. Bottom left, a sample of phosphate glass doped with europium. Second from bottom left, mug containing tinted water, highlighting high aspect ratio features and fused print lines. At the bottom in the middle, a micro-tower with a height of ∼2 mm. Second lower right and far right, scanning electron microscopy images of a byte lattice structure and microtoroid optical resonator. Credit: top left, Liosdesign; top right, reproduced with permission from ref. 7, Springer Nature Ltd. Bottom left, courtesy Ref. 3, Elsevier; second lower left, courtesy Ref. 4, Wiley; bottom middle, courtesy Ref. 8 Wiley; lower right and far right, reproduced with permission from ref. 9, Springer Nature Ltd.

The qualities of glass are often related to the applications in which the material is used, and 3D printing is able to fabricate parts with a wide variety of geometries, but as higher processing temperatures are required to form glass than plastics, she started late in the industry. The resolution of features for 3D printing on glass is still limited to the micrometer, but two researchers, from Penn State and the University of Padua in Italy, recently published an article on 3D printing of glass at the nanoscale, stating that they were able to print “silica glass components with a resolution of less than 200nm”. The method they used for their proof of concept was based on two-photon polymerization, or 2PP, and they experimented with a commercially available “colloidal silica functionalized with polyethylene glycol (PEG) with a dimension of ~ 10 nm “.

“By matching the PEG functional groups with those of the photocurable polymers, they improved the miscibility of the suspension, achieving a high loading of silica nanoparticles. In addition, the same refractive index possessed by the two components of the raw material led to high transparency and limited diffusion. This enabled the 3D printing of complex structures with a resolution of less than 200 nm, ”the researchers wrote. “The choice of the firing temperature (1300 ° C or 1100 ° C) led to the production of crystalline or amorphous silica. The researchers went even further and used their approach to fabricate microtoroid whisper gallery resonators with high-quality factors, as well as active photonic devices produced by doping the suspension with photoluminescent rare earth elements.

Publication of 3D bio-printed immune skin model wins award

Last year, cell therapy research startup CTIBiotech unveiled two bio-printed skin model technologies for skin care applications, and the resulting research publication, developed with BASF’s Care Creations, won the prestigious Henry Maso Award from the International Federation of Societies of Cosmetic Chemists (IFSCC) 2021. conference. BASF and CTIBiotech have worked together for several years, and 3D bioprinting methods developed at CTIBiotech will allow scientists to produce predictive copies of complete human skin tissue models containing macrophages, which monitor the microenvironment from skin to skin. looking for signs of tissue infection, injury, or stress cells — of the human immune system, while BASF scientists will use technology to select the best ingredients and bioactives for advanced skin care applications. CTIBiotech 3DBioprinting Director Maxime Lègues, who presented the original work at last year’s IFSCC Congress prior to its publication, will receive a scholarship to attend the IFSCC 2022 Congress to receive the award in person.

“There is a strong need for better test systems showing how ingredients affect or can improve sensitive or allergic skin,” said Dr Sébastien Cadau, 3D tissue engineering specialist at the BASF site in Lyon, France. . “The presented 3D bio-printed model of human skin which contains cells of the immune system is therefore a solution for rapid and reliable testing of products treating reactive skin. “

Formnext’s Purmundus Challenge 2021

Last week, the eight gold trophy winners of the annual international 3D printing design award and 4D Purmundus Challenge were announced at Formnext 2021. Sophia Lindner from act’ble GmbH, which works with athletes to develop a new pointe shoes for ballet and contemporary dance, won first prize for the patented New Pointe Shoe Sole concept, which would last five times longer and reduce physical pain. Ramon Mañas with Odisei Music SL took second place for the 3D printed Travel Sax, which would be the smallest and lightest electronic saxophone in the world and which is already played by 1,200 customers worldwide. Jamie Cook, Henry Neilson, Theo Clarkes, Mark Brown, Jess Lewis and George Jary of HEXR, the already award-winning 3D printed custom bike helmet, took third place for the helmet, which combines safety and comfort as it is designed for measurement.

Five special Purmundus Challenge prizes were also awarded to Formnext 2021:

  • Special Mention, Macu4, personalized forearm prostheses
  • Innovation Prize, SUTD, Washington State University and University of Colorado Denver, flexible robots printed in custom 3D
  • Public Choice Award, Roberto Trunfio, 3D printed Delijuice juicer made from processed citrus waste filaments
  • Altair Simulation Driven Design Award, Desktop Metal, Toucan Beak 3D Printed Lightweight Heat Exchanger Solution
  • Newcomer Award, ETH Zurich, 3D Printed Brake Caliper with Function Integration

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