Forty-three undergraduates receive Erickson Discovery Grants psu.edu - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from psu.edu Daily Mail and Mail on Sunday newspapers.
Through collaboration with other government agencies, U.S. national consensus organizations, and international governments, our engineers have developed
Wire arc additive manufacturing (WAAM) has been widely used due to its advantages of low cost and high efficiency. However, one of the unsolved problems in WAAM is the heat accumulation. In this study, the compressed argon-based interlayer active cooling (AC) process is employed to reduce heat accumulation, and the influence mechanism on microstructure and mechanical properties of Ti–6Al–4V samples are revealed. It is shown in the results that the introduction of interlayer AC leads to the interlayer temperature decreases from 468 to 53 °C, and the widths of prior-β grains and αGB are refined. The increase of cooling rate (380–604 °C s−1) results in the transformation of large-sized colonies into finer basket weave structure, accompanied by the production of martensite α’. The finer basket weave structure increases the strength of the samples, while the narrower αGB and the high-angle grain boundaries increase the resistance of crack propagation. The high dislocation de
Composite test methods (and specifications) for fiber-reinforced concrete structures compositesworld.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from compositesworld.com Daily Mail and Mail on Sunday newspapers.
Kevlar is a synthetic material created from a chemical known as poly-para-phenylene terephthalamide. Here, we discuss this strong and heat-resistant synthetic fiber Kevlar, its properties, limitations, applications, and recent relevant studies.