When machining, most people focus on the part or product they are producing. Purdue professor Srinivasan Chandrasekar and his colleague, Dale Compton, however, find the scrap most interesting. While studying machining processes, the researchers found that the metal chips produced were composed of nano-crystalline structures, which possessed characteristics such as high strength and wear resistance. "After that, we lost all interest in the more complicated processes and concentrated on the residue," Chandrasekar laughs. Typically the chips are collected as scrap, melted down and reused. But melting turns these natural nanocrystals back into ordinary bulk metals, removing their super strength and other unusual properties. "We've known that if a material is deformed beyond recognition, one can create a new stronger material with different characteristics," Chandrasekar continues. The shaving tool applies the correct amount of pressure to deform the metal shaving. He believes that a machining process could be designed to create materials with specific crystal sizes, which could have a number of applications. For example, the shavings could be made into powder and added to other materials to form a new class of composites. Or the powder could be compressed into solid bodies and used to build fuel system components, turbocharger blades, bearings, or gears with better wear resistance than those used today. Nanocrystal materials have long been a pie-in-sky material because they cost about $100 per pound to produce. Chandrasekar expects that, with the new patent pending process, will cost only $1 per pound above the cost of the raw material. For more information, contact either: Srinivasan Chandrasekar at (765) 494-3623, email: email@example.com; or Dale Compton at (765) 494-0828, email: firstname.lastname@example.org.
The engineers and inventors of the post WWII period turned their attention to advancements in electronics, communication, and entertainment. Breakthrough inventions range from LEGOs and computer gaming to the integrated circuit and Ethernet -- a range of advancements that have little in common except they changed our lives.
The age of touch could soon come to an end. From smartphones and smartwatches, to home devices, to in-car infotainment systems, touch is no longer the primary user interface. Technology market leaders are driving a migration from touch to voice as a user interface.
Soft starter technology has become a way to mitigate startup stressors by moderating a motor’s voltage supply during the machine start-up phase, slowly ramping it up and effectively adjusting the machine’s load behavior to protect mechanical components.
A new report from the National Institute of Standards and Technology (NIST) makes a start on developing control schemes, process measurements, and modeling and simulation methods for powder bed fusion additive manufacturing.
If you’re developing a product with lots of sensors and no access to the power grid, then you’ll want to take note of a Design News Continuing Education Center class, “Designing Low Power Systems Using Battery and Energy Harvesting Energy Sources."
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.