Thesis-1982-Naeem.pdf (3.34 MB)
Fatigue precracking of a titanium alloy
thesis
posted on 2019-05-08, 11:02 authored by Mohammed NaeemThe extensive use of Ti-6AI-4V forgings in aircraft
gas engine compressor discs and blades has generated
considerable interest in its crack growth behaviour at
elevated temperatures.
Before crack growth studies can be performed on
test specimens it is necessary to precrack the specimen to
provide consistently sharp fatigue cracks of adequate size
and straightness.
Initially the stress intensity amplitude used to
grow a precrack is considerably higher than that used in
the actual crack growth studies but it is progressively
reduced as the required length of precrack is achieved.
The reductions in stress intensity amplitude are usually
made manually by observing the crack length as stress
cycling proceeds and decreasing the stress amplitude on the
test machine as the crack length grows.
In this study, a method of performing this precracking
operation automatically by the use of computer control of
the test machine was developed, and tested. The results
confirm the method used to be successful.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Publisher
Loughborough UniversityRights holder
© M. NaeemPublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
1982Notes
A Master's Thesis. Submitted in partial fulfilment of the requirements for the award of the degree of Master of Philosophy at Loughborough University.Language
- en
Supervisor(s)
Dr T.E. ChungQualification name
- MPhil
Qualification level
- Masters