Precipitation of γ’ during cooling of nickel-base superalloy Haynes 282
Journal article, 2021

Cooling-induced precipitation of the strengthening γ’ phase is commonly investigated in Ni-base superalloys with a high γ’ volume fraction, where it is used to control the final microstructure and properties. Less is known about the phase separation in low-volume-fraction alloys during cooling, although the microstructural state after cooling from solution treatment is known to affect subsequent heat-treatment steps. We use atomic-scale characterisation of Ni-base superalloy Haynes 282 (equilibrium γ’ volume fraction around 20%) to show that air cooling after solution or carbide stabilisation results in precipitation of nm-sized γ’ particles, whereas precipitation was suppressed during water quenching. The solution treatment has a significant effect on the hardness and γ’ precipitation during air cooling from the subsequent carbide stabilisation temperature. Also, the carbide-stabilisation treatment itself affects the γ’ precipitation during subsequent air cooling.


heat treatment


atom probe tomography



Ceena Joseph

Chalmers, Industrial and Materials Science, Engineering Materials

GKN Aerospace Sweden

Mattias Thuvander

Chalmers, Physics, Microstructure Physics

Christer Persson

Chalmers, Industrial and Materials Science, Engineering Materials

Magnus Hörnqvist Colliander

Chalmers, Physics, Microstructure Physics

Philosophical Magazine Letters

0950-0839 (ISSN) 1362-3036 (eISSN)

Vol. 101 1 30-39

Thermo-mechanical fatigue of NI-based supperalloys (TMF II)

VINNOVA (2013-01154), 2013-01-02 -- 2017-06-30.

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Manufacturing, Surface and Joining Technology

Metallurgy and Metallic Materials


Chalmers Materials Analysis Laboratory

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Materials Science



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