Accession Number : ADA268352


Title :   Atlas of Formability: Ultimet


Descriptive Note : Final rept. 28 Dec 92-24 Mar 93,


Corporate Author : NATIONAL CENTER FOR EXCELLENCE IN METALWORKING TECHNOLOGY JOHNSTOWN PA


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a268352.pdf


Report Date : 24 Mar 1993


Pagination or Media Count : 70


Abstract : In this investigation, flow behavior of Ultimet alloy was studied by conducting compression tests over a wide range of temperatures (950-1200 C) and strain rates (0.001-20/s). The true stress-true strain flow curves are presented for each test condition. Constitutive relations were determined from the flow behavior, and a dynamic material modeling was performed on this material. Thus, the optimum processing condition in terms of temperature and strain rate was identified as 1012 C and 0.001/s for this alloy. Workability of the material as a function of strain rate and temperature was also determined. Microstructural changes during high temperature deformation were characterized, and selective micrographs are presented together with corresponding flow curves. Dynamic recrystallization and grain growth occurred during high temperature deformation in some test conditions. This report supplies ample mechanical and microstructural data on Ultimet alloy for engineers in the field of metalworking process design.... Ultimet Alloy, Deformation Processing, High Temperature Deformation, Processing Map, Metalworking, Deformed Microstructure.


Descriptors :   *DEFORMATION , *METALWORKING , TEST AND EVALUATION , COMPRESSION , STRESS STRAIN RELATIONS , FUNCTIONS , TEMPERATURE , MICROSTRUCTURE , ALLOYS , MAPS , CURVES(GEOMETRY) , RECRYSTALLIZATION , GRAIN GROWTH , SUPPLIES , FLOW , ENGINEERS , STRAIN RATE , RATES , DYNAMICS , MATERIALS , PROCESSING , COMPOSITE MATERIALS , HIGH TEMPERATURE


Subject Categories : Inorganic Chemistry
      Laminates and Composite Materials
      Fabrication Metallurgy
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE