High-resolution electron microscopy and electron diffraction study of the displacive transformation of the Ni[sub 2]Al phase in a Ni[sub 65]Al[sub 35] alloy and associated with the martensitic transformation

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(93)90317-L· OSTI ID:6273878

Muto, S; Schryvers, D ^[1]; Merk, N ^[2]; Tanner, L E ^[3]

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1. Univ. of Antwerp, Antwerp (Belgium)
2. Ecole Polytechnique Federale, Lausanne (Switzerland)
3. Lawrence Livermore National Lab., Livermore, CA (United States)

The Ni-rich Ni-Al [beta][sub 2] phase (CsCl structure) exhibits the precipitation of a metastable Ni[sub 2]Al phase, which is closely related to an underlying lattice instability of the (111) phonon branch in the [beta][sub 2] phase. The Ni[sub 2]Al precipitates undergo both the Bain distortion and twinning together with the martensitic transformation of the [beta][sub 2] matrix. The resulting structure of the Ni[sub 2]Al precipitates in the martensite is presented and discussed.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6273878
• Journal Information: Acta Metallurgica et Materialia; (United States), Vol. 41:8; ISSN 0956-7151
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
MICROSTRUCTURE
NICKEL ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
INTERMETALLIC COMPOUNDS
PRECIPITATION
SAMPLE PREPARATION
TWINNING
ALLOYS
COHERENT SCATTERING
DATA
DIFFRACTION
INFORMATION
MICROSCOPY
NUMERICAL DATA
PHASE TRANSFORMATIONS
SCATTERING
SEPARATION PROCESSES
360102* - Metals & Alloys- Structure & Phase Studies