Effect of solution treatment on the stress rupture property of MA ODS Ni-base superalloy at 760 C

Journal Article · Sun Oct 01 00:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00325-P· OSTI ID:237835

Park, L J; Kim, Y G; Hong, S H ^[1]; Haeberle, R M; Watwe, A S ^[2]

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1. Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Materials Science and Engineering
2. INCO Alloys International, Inc., Huntington, WV (United States)

The strengthening of mechanically alloyed (MA) oxide dispersion strengthened (ODS) Ni-base superalloys is obtained through the precipitation hardening by a Ni{sub 3}(Al, Ti), which is known as {gamma}{prime} phase, at the intermediate temperature region of 760--850 C. The {gamma}{prime} precipitates are ordered FCC (L1{sub 2}) structure and are coherent with the nickel-rich {gamma} matrix having FCC structure. The size, volume fraction and distribution of the {gamma}{prime} precipitates are sensitively related to the heat treatment for precipitation and these parameters can significantly affect the mechanical properties of ODS Ni-base superalloys. The aim of this study was to investigate the effect of solution heat treatment temperature on the {gamma}{prime} precipitate size and stress rupture property of MA ODS Ni-base superalloy. The deformation mechanism of ODS Ni-base superalloy was discussed by observing the interaction between dislocations and {gamma}{prime} precipitates at 760 C.

• OSTI ID: 237835
• Journal Information: Scripta Metallurgica et Materialia, Vol. 33, Issue 7; Other Information: PBD: 1 Oct 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL BASE ALLOYS
HEAT TREATMENTS
FRACTURE PROPERTIES
POWDERS
MILLING
EXTRUSION
ANNEALING
SOLUTIONS
AGING
PRECIPITATION
INTERMETALLIC COMPOUNDS
SIZE
HARDENING
DISLOCATIONS