Abstract
The temperature coefficient of electrical resistivity (TCR) of the commercial Ti-15-3 alloy is negative, if the alloy is in the 100% β condition. The TCR increases from negative to positive values as a result of precipitation of the ω and α phases during ageing. An incubation or transient period, during which the value of TCR remains essentially unchanged, precedes the formation of the ω phase; this transient period decreases with increasing ageing temperature over the range 250–400 °C. Changes in the value of TCR signal the initiation of beta decomposition before the ω phase can be detected by conventional TEM and diffraction techniques. Reversion of the ω phase by up-quenching after ageing restores the original negative value of TCR. If both α and ω phases are present in the aged condition, only partial recovery of the quenched TCR value is possible, indicating that the alpha phase is not reverted by up-quenching. The results point to the potential value of TCR determinations for monitoring the initiation of β decomposition in titanium alloys exposed to temperatures above room temperature.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
