A preliminary study of the scaling characteristics in air of laboratory-produced titanium and titanium-base alloys, and commercially-produced titanium and titanium-base alloys was conducted at temperatures of 1200, 1400, 1600, and 1800 F (650, 760, 870, and 980 C) in the time range of approximately 4 to 300 hours. A total of 43 titanium-base alloys, one commercial grade of titanium (RS-70), and AISI Type 302 stainless steel were scaled at each of these temperatures; two additional alloys were employed at temperatures of 1200 and 1600 F. Scales formed on a 4.02 percent Al-Ti alloy were studied in detail and a scaling mechanism was suggested; scales formed on a 4.03 percent Cr-Ti alloy and a 2.95 percent W-Ti alloy were studied in less detail. Scaling tendencies of titanium-base alloys, relative to titanium and stainless steel were evaluated on the basis of weight gain with time. Isothermal transitions in scaling rate were observed for titanium and titanium-base alloys within the temperature range 1200-1600 F.
The Scaling of Titanium and Titanium-Base Alloys in Air Available to Purchase
HAL W. MAYNOR, JR.—Research metallurgical engineer, Major Appliance Laboratories, General Electric Co., Louisville, Kentucky. He received a BS in metallurgical engineering in 1944 from the University of Kentucky, an MS in metallurgical engineering in 1947 and a Doctor of Engineering in 1954. Following a three-year tour of duty with the U. S. Navy he served as an assistant professor in the department of mechanical engineering at Iowa State College. Dr. Maynor is a member of Sigma Xi, Kentucky Academy of Science, American Society for Metals and American Institute of Mining and Metallurgical Engineers.
ROY E. SWIFT—Associate professor of mining and metallurgical engineering at the University of Kentucky. He has engineering degrees from the Missouri School of Mines, University of Washington, University of Utah and Yale University. Dr. Swift is a member of several professional and scientific societies and is a registered professional engineer in the fields of mining, metallurgy and chemistry.
