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
The Powder Metallurgy (PM) Design Excellence Awards competition celebrated its 50th anniversary this year. These awards were presented during the 2014 World Congress on Powder Metallurgy & Particulate Materials, which is run by the Metal Powder Industries Federation.
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....More
Manufacturers worldwide use additive manufacturing to build prototypes, but now 3D printing is finding use in short-run manufacturing for plastic production parts made in small to medium quantities where traditional tooling isn’t up to speed....More
For engineers who design welded-steel structures subject to dynamic loading, fatigue life is normally a top priority. Whether welding together a few relatively simple parts or fabricating large, complex structures, weld fatigue is likely to be the most-common failure mode if the part or structure is subjected to fluctuating stresses....More
A recent Machine Design article, “The basics of fatigue in welded steel structure,” made reference to the fact that extensive research has been conducted by various organizations in a number of countries over the last several decades. Here’s a brief overview of that research work.
A brief history...More
Tuesday, November 12 German rock band "Compressorhead" performed for crowds in Union Square, NYC. The three band members (Fingers, Bones, and Stickboy) are 5 feet tall and made from scrap metal. Their function is made possible by electro pneumatics with behind the scenes help using a Midi controller for music.