High-temperature X-ray measurements of the lattice mismatch of creep-deformed monocrystals of the nickel-base superalloy SRR 99

Journal Article · Mon May 01 04:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00179-Y· OSTI ID:64364

Biermann, H; Strehler, M; Mughrabi, H ^[1]

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1. Univ. Erlangen-Nuernberg, Erlangen (Germany). Institute fuer Werkstoffwissenchaften

In {gamma}{prime}-hardened nickel-base superalloys, the lattice mismatch between {gamma}{prime}-precipitates and {gamma}-matrix is one of the important microstructural quantities. The lattice parameters a{sup {gamma}} and a{sup {gamma}{prime}} of the phases {gamma} and {gamma}{prime}, respectively, can be obtained from the analysis of X-ray line profiles measured with high resolution. From these lattice parameters the lattice mismatch {delta} = (a{sup {gamma}{prime}} {minus} a{sup {gamma}})/0.5 (a{sup {gamma}{prime}} + a{sup {gamma}}) can be calculated. The present X-ray investigations were performed on one undeformed, one aged and on several tensile-creep deformed [001]-oriented samples of the monocrystalline nickel-base superalloy SRR 99.

• OSTI ID: 64364
• Journal Information: Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 9 Vol. 32; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DEFORMATION
LATTICE PARAMETERS
MICROSTRUCTURE
NICKEL BASE ALLOYS
PRECIPITATION
RESIDUAL STRESSES
STRESSES
X-RAY DIFFRACTION