On the Influence of Dispersoids on the Particle Stimulated Nucleation of Recrystallization in an Al-Fe-Si Model Alloy

Conference · Wed Dec 31 00:00:00 EST 1997

OSTI ID:627132

Engler, O

The recrystallization of Al-alloys is controlled by precipitates. Whereas large particles generally promote recrystallization by particle stimulated nucleation, finely dispersed precipitates - either already present in the as-deformed state or precipitating during the recrystallization anneal - are known to strongly retard recrystallization. It was the aim of the present study to elucidate these concurring effects of large particles and small dispersoids on recrystallization in a ternary Al-Fe-Si model alloy. For that purpose, samples were prepared according to different pre-annealing treatments so as to comprise different states of precipitation and supersaturation. The evolution of microstructure and texture during rolling and recrystallization was characterized by metallography and by conventional X-ray texture analysis. EBSD-local texture investigations were employed to yield information on the efficiency of nucleation at the various nucleation sites and, consequently, on the influence of dispersoids on recrystallization.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Management and Administration, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 627132
• Report Number(s): LA-UR-97-4288; CONF-9709189-; ON: DE98003005; TRN: AD-a339 609
• Resource Relation: Conference: International conference on textures and anisotrohy of polycrystals, Claushal (Germany), 22-25 Sep 1997; Other Information: PBD: [Sep 1997]
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
NUCLEATION
IRON ALLOYS
PARTICLES
SILICON ALLOYS
RECRYSTALLIZATION
ANNEALING
MICROSTRUCTURE
BACKSCATTERING
X RADIATION
ELECTRONS
DIFFRACTION
SUPERSATURATION
TEXTURE
METALLOGRAPHY
DISPERSIONS
PRECIPITATION
TERNARY ALLOY SYSTEMS
DISPERSOIDS
ESBD(ELECTRON BACKSCATTERING DIFFRACTION)
PSN(PARTICLE STIMULATED NUCLEATION)