STUDY OF FACTORS INFLUENCING DUCTILITY OF IRON-ALUMINUM ALLOYS. Monthly Letter Report No. 7 for May 1, 1960 to April 30, 1961

Resistivity specimens of 16-Alfenal and Thermenal were machined from the as-rolled 0.035-in.-thick stock, annealed for varying lengths of time at 650 deg C to obtain the desired microstructures, and prepared to establish a high degree of Fe/sub 3/Al order. Resistivity measurements were made, the results of which are presented graphically. These isothermal resistivity curves were analyzed to establish the effects of heat treatment on the mechanical properties of the various alloys. Initial results of these studies are presented in relation to mechanical properties and hardness indentations. (For preceding period see TIDl1106.) (J.R.D.