Precipitation of γ’ during cooling of nickel-base superalloy Haynes 282
Artikel i vetenskaplig tidskrift, 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.

Superalloy

atom probe tomography

heat treatment

cooling

precipitation

Författare

Ceena Joseph

GKN Aerospace Sweden

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Mattias Thuvander

Chalmers, Fysik, Mikrostrukturfysik

Christer Persson

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Magnus Hörnqvist Colliander

Chalmers, Fysik, Mikrostrukturfysik

Philosophical Magazine Letters

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

Vol. 101 1 30-39

Drivkrafter

Hållbar utveckling

Styrkeområden

Produktion

Materialvetenskap

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Metallurgi och metalliska material

Korrosionsteknik

Infrastruktur

Chalmers materialanalyslaboratorium

DOI

10.1080/09500839.2020.1841314

Mer information

Senast uppdaterat

2021-01-05