Grain refinement in a Cu-Al-Cr alloy by thermomechanical processing. [Cu-2Al-0. 5Cr]
Conference
·
· TMS (The Metallurgical Society) Paper Selection; (USA)
OSTI ID:5369607
- Israel Electric Works, Haifa
Electron microscopic observations on Cu-2Al-0.5 Cr samples subjected to increasing amounts of cold deformation following solution treatment indicate that strain induced precipitation occurring at 40-50% reduction alters the deformation substructure from cellular to an uniform, tangled distribution of dislocations. On annealing, samples deformed about 70% were found to recrystallize fully after 30 minutes at 600 C, producing grain sizes between 2-10 microns. Prolonged holding at 600 C up to 24 hours caused no observable grain coarsening. Transmission microscopic studies on recrystallized specimens indicated a definite grain boundary pinning role exerted by the precipitate particles. Reports of grain size control in age hardenable alloys through thermomechanical processing usually specify a separate aging operation prior to cold deformation and subsequent annealing. In the present case, precipitation occurring concurrently with deformation obviates the need to incorporate an aging step into the processing schedule.
- OSTI ID:
- 5369607
- Report Number(s):
- CONF-840909--
- Conference Information:
- Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Journal Volume: 56
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
AGE HARDENING
ALLOYS
ALUMINIUM ALLOYS
ANNEALING
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
COPPER ALLOYS
COPPER BASE ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEFORMATION
DISLOCATIONS
ELECTRON MICROSCOPY
FABRICATION
GRAIN BOUNDARIES
GRAIN SIZE
HARDENING
HEAT TREATMENTS
LINE DEFECTS
MATERIALS WORKING
MICROSCOPY
MICROSTRUCTURE
PRECIPITATION
RECRYSTALLIZATION
SEPARATION PROCESSES
SIZE
THERMOMECHANICAL TREATMENTS
TRANSMISSION ELECTRON MICROSCOPY
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
AGE HARDENING
ALLOYS
ALUMINIUM ALLOYS
ANNEALING
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
COPPER ALLOYS
COPPER BASE ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEFORMATION
DISLOCATIONS
ELECTRON MICROSCOPY
FABRICATION
GRAIN BOUNDARIES
GRAIN SIZE
HARDENING
HEAT TREATMENTS
LINE DEFECTS
MATERIALS WORKING
MICROSCOPY
MICROSTRUCTURE
PRECIPITATION
RECRYSTALLIZATION
SEPARATION PROCESSES
SIZE
THERMOMECHANICAL TREATMENTS
TRANSMISSION ELECTRON MICROSCOPY