a) Give examples of low, medium and high strain rate test types. [4 marks] b) A plot of log (stress) against log (strain rate) provides a straight line relationship. Based on this, provide an equation that relates flow stress to strain rate and explain how measurements could be made to establish strain rate sensitivity based on this. [8 marks] c) Describe how temperature affects flow stress and how experiments to define this relationship could be undertaken. What is the typical form of the equation relating flow stress and temperature? [8 marks] d) How would the equation described in c) allow for determination of the activation energy for plastic flow? [5 marks]