Deciding between machining and 3D printing may point you to powder-metallurgy processes. Powder metal parts are complex so they cut weight, yet they can be produced in large quantities and have proven higher strength and quality over 3D-printed parts.
The PFC2 and PFS2 self-clinching captive-panel screws from PennEngineering (www.pemnet.com), Danboro, Pa., provide secure and permanent attachment for thin-metal assemblies. The fasteners can also.......More
Crooks trying to hide their crimes or identities by filing the telltale serial numbers and markings from firearms, cars, or bullet casings could soon have a new forensic technique to worry about: backscatter diffraction. Engineers at the National Institute of Standards and Technology (NIST) have found a way to use this technique to read the imprint of letters and markings that were stamped into metal, but then polished or ground off....More