Radiation-induced changes in microstructures often lead to significant changes in
mechanical properties of alloys used in the construction of nuclear reactors. It is
desirable to test small specimens to make efficient use of the small volumes available in
test and commercial reactor cores and also because small specimens are less affected by
the sometimes steep flux gradients experienced in reactor cores and the sometimes large
temperature gradients developed in the specimens from gamma heating. (Continues...).
Doctoral Thesis. Submitted in partial fulfillment of the requirements for the award of Doctor of Philosophy of Loughborough University.