Abstract
The transformations from short- to long-range order in Haynes® Alloy 242, a nominal Ni25Mo8Cr (in wt%) alloy, during isothermal aging at temperatures between 550 and 750°C are reported using microhardness measurements, and optical and transmission electron microscopy. Aging below the critical transformation temperature (∼ 775°C) led to considerable hardening; this hardening was associated with the formation of a very high volume fraction of Ni 2(Mo,Cr) domains/precipitates. The transformation from short- to long-range order was observed to proceed by a mechanism of continuous ordering at temperatures ⩽ 700°C, whereas at temperatures (750°C) close to the critical temperature a first order nucleation and growth mechanism appeared to be operative. The sequence of transformations are correlated with the associated diffraction effects and discussed in terms of theoretical formulations and experimental observations of other studies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
