Friction Processes

How can you build large, durable structures in deep space in a way that minimizes parts handling, simplifies construction steps, and can be automated or controlled remotely? In a project funded by NASA, EWI and BOND Technologies have developed and validated a process based on refill friction stir spot welding (RFSSW) to build a solar...

Integrated computational materials engineering (ICME) can be used effectively to understand thermal excursions and mechanical response in single-shot joining methods such as resistance-spot, flash-butt, friction, hot-gas, and thermite welding. As part of EWI’s ongoing series of papers examining the uses of ICME as a prediction tool in manufacturing, Senior Technology Leader Jerry Gould has written...

The H-coupon test, developed a few years ago to evaluate cracking behavior in spot-welded advanced high-strength steels (AHSS), has recently been applied to galvanized third generation AHSS. Two types of cracking have been observed in the tests of these steel grades – interfacial and zinc liquid metal embrittlement (LME). This research is discussed in Application...