Effects of heat treatment on prior particle boundary precipitation in a powder metallurgy nickel base superalloy

Effects of heat treatment on prior particle boundary precipitation in a powder metallurgy nickel base superalloy

PPB precipitation in powdered Rene'95 is analyzed. The effects of PHT on PPB precipitation are studied. It is found that fracture along PPB is ductile in microscale. During PHT, the phase transformation on powder surface is similar to PPB interface. PHT cannot reduce the degree of contamination...

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Veröffentlicht in:Advanced performance materials 1995-09, Vol.2 (3), p.269-279
Hauptverfasser: Wanhong, Yang, Jian, Mao, Wuxiang, Wang, Jinwen, Zou, Ruifa, Zhou
Format: Artikel
Sprache:eng
Schlagworte:
Contamination
Ductility
Fracture
Heat treatment
Interfaces (materials)
Nickel
Phase transitions
Powder metallurgy
Powders
Precipitation (chemical)
Surfaces
Thermal effects
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Zusammenfassung:PPB precipitation in powdered Rene'95 is analyzed. The effects of PHT on PPB precipitation are studied. It is found that fracture along PPB is ductile in microscale. During PHT, the phase transformation on powder surface is similar to PPB interface. PHT cannot reduce the degree of contamination on powder surface. But the precipitates on surface are coarsened. The coarsening enlarges distances between precipitates. As the result, microfracture property is improved at PPB.
ISSN:0929-1881
1572-8765
DOI:10.1007/BF00705449