- Question 2 A Describe The Four Main Dislocation Types And How They Relate To Shear Stress And The Burgers Vector 6 1 (116.67 KiB) Viewed 25 times
Question 2. a) Describe the four main dislocation types and how they relate to shear stress and the Burgers' Vector. [6 marks] b) How does the yield strength of a polycrystalline material improve when strengthening mechanisms are employed? Provide your answer in terms of dislocation movement and interaction. [4 marks] c) Describe the relationship between yield strength and grain size, commenting on how dislocation theory is related to this. Describe the limitations of this relationship. [6 marks] d) Describe the effect of age hardening in steels. Why is this an important consideration during the manufacture of steel components? [4 marks] e) Describe how the process of ageing can occur during precipitation hardening. What are the effects on microstructure and strengthening? [5 marks]