Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Fifth Monthly Letter for Period of March 1959 to March 1960

摘要

This informal letter report is the fifth of a series of monthly letter reports for the contract year, 15 March 1959 to 15 March 1960, describing the progress made on the research program, 'Study of Factors Influencing Ductility of Iron-Aluminum Alloys'. The objective of the program is to determine the effect of variations of aluminum content, heat treatment and basic slip mechanism upon the room temperature ductility of Fe-A1 alloys. Since alloys containing above 10% aluminum are characterized by an order-disorder transformation, heat treatment will provide the opportunity to study the effects of disorder, varying degrees of order, and incipient order upon the plastic flow mechanism. With a fundamental understanding of the deformation and fracture behavior of these alloys, it should then be possible to devise means to effect significant improvements in their room temperature ductilities by a combination of heat treatment and minor alloying additions.