Atlas of Formability: Haynes 188

In this investigation, flow behavior of Haynes 188 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 alloy. Thus, the optimum processing condition in terms of temperature and strain rate was identified as 1100 C and 0.001s for this alloy. Microstructural changes during high temperature deformation were also characterized, and selective micrographs are presented together with corresponding flow curves. Dynamic recrystallization and grain growth occurred during high temperature deformation over the range of temperatures tested. This report supplies ample mechanical and microstructural data on Haynes 188 alloy for engineers in the field of metalworking process design. The data presented here are also very helpful in finite element analysis of metalworking processes.... Haynes 188, Deformation Processing, High Temperature Deformation, Processing Map, Metalworking, Deformed Microstructure.