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Effects of different solution heat treatments on the hot ductility of superalloys Part 3 - Waspaloy

Joel Andersson (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Göran Sjöberg (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Leif Viskari (Institutionen för teknisk fysik, Materialens mikrostruktur ) ; M. Chaturvedi
Materials Science and Technology (0267-0836). Vol. 29 (2013), 1, p. 43-53.
[Artikel, refereegranskad vetenskaplig]

The susceptibility to heat affected zone cracking of Waspaloy has been investigated in terms of its hot ductility, measured as the reduction of area (RA). Gleeble testing with on-heating as well as on-cooling test cycles was carried out to illuminate the influence of different 4 h solution heat treatments between 996 and 1080 degrees C. A ductility maximum of between 80 and 90%RA was found at 1050-1100 degrees C for all conditions in the on-heating tests. Although the different heat treatment conditions showed similar macrohardness, the particle size and distribution of the gamma' and M23C6 phases differed, which significantly affected the on-heating ductility in the lower temperature test region. The ductile to brittle transition was initiated at 1100 degrees C in the on-heating testing with indications of grain boundary liquation at the higher test temperatures. Ductility recovery, as measured in the on-cooling tests from 1240 degrees C, was very limited with <30%RA for all conditions and test temperatures except for the 1080 degrees C/4 h treatment, which exhibited 60%RA at 980 degrees C.

Nyckelord: Waspaloy, Hot ductility, Gleeble testing



Denna post skapades 2013-02-21. Senast ändrad 2014-03-24.
CPL Pubid: 173981

 

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Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik (2005-2017)
Institutionen för teknisk fysik, Materialens mikrostruktur (2012-2015)

Ämnesområden

Materialteknik

Chalmers infrastruktur