PROGRESS REPORT NO. 9 ON ANNEALING OF COLD WORKED METALS

Technical Report · Sat Oct 01 04:00:00 EDT 1960

OSTI ID:4037627

Beck, P A; Ricketts, B G; Parthasarathi, M N; Sinha, P P; Diesner, R; Gautier, J J

The relative intensities of the various Al recrystallization texture components can be accounted for in terms of differences in boundary mobility between twist and tilt boundaries, and between the various tilt boundaries having different orientations but separating recrystallized grains and matrix which have a fixed orientation relationship to each other. A full account of this work is reported in an attached paper which has been submitted for publication along with another paper on Zn. Other work not described in the papers was directed toward a similar study with a commercial Al crystal of the (110) (11-bar2) orientation. Results of investigations show a sharp recrystallization development by selective growth of random nuclei in an 80%rolled high purity Al crystal of initial orientation (123) (41-bar2). All components of the recrystallization texture were related to the deformation texture by 40 deg rotations around STA111! axes. It was concluded that all known recrystallization textures in polycrystalline Al as well as single crystals, may be qualitatively accounted for on the oriented growth mechanism. No oriented nucleation mechanism was suggested that could satisfactorily account for any recrystallization in Al. In work on Cu, the (220) pole figure was determined for OFHC Cu rolled to 96% RA. The texture was found to consist of 8 components of 3 types roughly described by the orientations (135) STA21-bar1!, (112) STA111-bar! and (110) STA11-bar2! and very extensive orientation spreads. The volume fraction of the specimen corresponding to the four components of the type of orientation near (135) STA21-bar1! is larger than the volume fraction of the 4 components having the other two types of orientation combined. (J.R.D.)

• Research Organization: Illinois. Univ., Urbana
• NSA Number: NSA-15-023879
• OSTI ID: 4037627
• Report Number(s): TID-6993
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM
ANNEALING
COLD WORKING
CONFIGURATION
COPPER
CRYSTALS
EXPANSION
GRAIN BOUNDARIES
LATTICES
METALS, CERAMICS, AND OTHER MATERIALS
ORIENTATION
RECRYSTALLIZATION
ROLLING