1 The Effect of Temperature and Strain-Rate on the Deformation and Fracture of Mild Steel Charpy Specimens The ,, ,;.is Submitted in Suppliction for the Degree of Doctor of Thilosophy by SLoicor. Rodney Uilshaw D.Sc. A.12.3.M. (London) 1961. Deprtmeilt of -.ysicalietallurr - sy Imperial College University of London December 1964