Effect of Creep in Titanium Alloy Ti-6A1-4V at Elevated Temperature on Aircraft Design and Flight Test

Jenkins, Jerald M. (1984) Effect of Creep in Titanium Alloy Ti-6A1-4V at Elevated Temperature on Aircraft Design and Flight Test. Technical Report NASA TM-86033, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

Short-term compressive creep tests were conducted on three titanium alloy Ti-6A1-4V coupons at three different stress levels at a temperature of 714 K (825 degrees F). The test data were compared to several creep laws developed from tensile creep tests of available literature. The short-term creep test data did not correlate well with any of the creep laws obtained from available literature. The creep laws themselves did not correlate well with each other. Short-term creep does not appear to be very predictable for titanium alloy Ti-6A1-4V. Aircraft events that result in extreme, but short-term temperature and stress excursions for this alloy should be approached cautiously. Extrapolations of test data and creep laws suggest a convergence toward predictability in the longer-term situation.

EPrint Type:	NASA Technical Memorandum
Keywords:	Creep, High temperature
Subjects:	(31 - 39) Engineering: (39) Structural Mechanics
ID Code:	634
Deposited On:	02 Febuary 2006
Additional Information:	11 pages.