Long term thermal exposure of HAYNES 282 alloy

HAYNES® 282® alloy was recently introduced for applications in both aero and land-based gas turbine engines. While possessing excellent high temperature strength and LCF resistance, the alloy was designed to ensure adequate fabricability. The new alloy is readily hot and cold worked and has superior weldability relative to other alloys in its class. A key attribute of 282 alloy is the excellent stability of its microstructure upon long term thermal exposure. As a result, the alloy is not prone to severe embrittlement as are certain other alloys in its class. The stability of the alloy is also believed to contribute to the high temperature strength of the alloy over long exposure periods. In this paper, the thermal stability of 282 alloy will be investigated in two parts. The first being a comparative study of moderately long (1,000 hour) exposures between 282 alloy and other alloys in its class. The second part will investigate the effect of much longer thermal exposures of up to 16,000 hours on the tensile properties of 282 alloy. (AU) © 2010 by The Materials, Metals, & Materials Society. All rights reserved.