23 ALLOY 718: PART II A VERSATILE ALLOY FOR CRITICAL APPLICATIONS John deBarbadillo This second installment in a three-part series explores how the uses for 718 expanded beyond the aero-engine industry. DAMAGE ASSESSMENT OF ANCIENT SILVER DISHES AND PLATES Russell Wanhill and Omid Oudbashi Recovered ceremonial plates from the late Roman and early Byzantine periods are noninvasively examined to investigate damage that occurred both prior to their burial in the 5th-6th centuries and as a result of it. 14 ADVANCED MATERIALS & PROCESSES | JULY 2026 2 Dr. Katsuhiko Sano, Hokkaido University, uses a spray bottle containing an alkoxysilane-based coating to treat a rock surface in Cappadocia, Turkey. Courtesy of D&D K.K. On the Cover: 28 TECHNICAL SPOTLIGHT WHY ROTATING BEAM FATIGUE TESTING IS RESHAPING THE INDUSTRY A fundamental shi in how materials are qualified has led to the increased application of rotating beam fatigue testing as a streamlined alternative to axial testing. WHY HAS THIS IRON BRIDGE SURVIVED? Patricia S. Carrizo A study of a bridge in Argentina shows that preservation strategies based on material compatibility, controlled repair procedures, and a deep understanding of historical metallurgy can significantly extend the service life of such structures. 18
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