This research will determine the characteristics of fatigue initiation life, fatigue crack growth rates, and slow-stablecrack extensions following a post-irradiation anneal. fatigue intitiation life will be determined with smooth specimens of 308 stainless steel which have been annealed and then… More

Two different approaches to high temperature electromagneticacoustic-wave transducer (emat) design and construction willbe evaluated. the resulting emat's will be used to perform insertion loss, ultrasonic attenuation and ultrasonic velocity measurements on different steel specimens up to at least… More

Within a laboratory environment, emats have been used to characterize defects in both ferritic and austenitic welds . the use of shear-horizontal (sh) waves has proven part defects. for fracture mechanics evaluation of welded stru structures, it is particularly important to know the throughextent of… More

Cans will burst from over-pressurization as a result of the aerosol can is a consumer convenience item used for manyyears. however, safety problems have existed because the cans will burst from over-pressurization as a result of over-temperature. the problem is made acute by the introduction of… More

While the benefits of using composite materials in engineering applications are well known, industry growth has been limited by a number of factors that make it difficult to use composite materials in structural designs. This SBIR program will help address some of these issues by demonstrating the… More