Hot ductility study of HAYNES® 282® superalloy

The hot ductility of the newly developed Haynes 282 alloys has been investigated in different solution heat treatments conditions using the Gleeble weld thermal simulation method. The ultimate purpose of this study is to assess the feasibility of using this new alloy for the large aircraft engine structures. The strengthening response on cooling down from the solution heat treatment at different temperatures between 1121 and 1135°C with cooling rates of ~0.3°C/s was considerable (~100 HV increase compared with the as-received condition of HV215) and which may jeopardize weldability, not unexpectedly, in ?’ hardening alloys. Initial hardness had no or minor influence on hot ductility. Still, the coarse grains achieved by a solution heat treatment heating at 1135°C-2hrs, ASTM 1 compared to initial ASTM 5 did lower the hot ductility. (AU) © 2010 by The Materials, Metals, & Materials Society. All rights reserved.