Accession Number:

ADA063085

Title:

Microstructural Changes Following Deformation of Ti-6Al-4V.

Descriptive Note:

Final scientific rept. 15 Sep 77-14 Sep 78,

Corporate Author:

TECHNION - ISRAEL INST OF TECH HAIFA DEPT OF MATERIALS ENGINEERING

Personal Author(s):

• Rosen,Abraham

Report Date:

1978-10-25

Pagination or Media Count:

14.0

Abstract:

Creep tests have been performed in the range 800-900 C on thin specimens of commercially pure titanium. It was observed that, in the temperature range of interest, the mode of failure was strongly dependent upon the imposed creep rate. Transmission electron microscopy revealed that recrystallization occurred during high creep rate deformation and that the recrystallization nuclei often occurred at grain boundary triple points where the dislocation density was relatively high. By contrast in low creep rate experiments there was no evidence of large scale recrystallization or grain boundary migration but dislocation climb appeared to be an important factor in creep in this region. Author

Descriptors:

• *CREEP
• *TITANIUM
• *TITANIUM ALLOYS
• ISRAEL
• MICROSTRUCTURE
• DEFORMATION
• RATES
• ELECTRON MICROSCOPY
• MIGRATION
• RECRYSTALLIZATION
• GRAIN BOUNDARIES
• METALLURGY

Subject Categories:

• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE