Briefly describe how finer grain structures contribute to increasing theroom temperature strength of a metal. Discuss why fine grainedstructures are not an advantage at high temperatures where creepdeformation may be a risk. Describe how knowledge of these effects isused to optimize the strength of high temperature turbine blades
A copper sample provides a yield strength of 100 MPa as it starts to plastically deform. The sample is unloaded shortly after reaching yield strength and is tested again. Explain what you would expect to observe in relation to yield strength during this re-test: use dislocation theory to help your explanation.
TRAFFIC CONSTRUCTION ENGINEERING, SEA ENGINEERING, CONSTRUCTION CONSTRUCTION ENGINEERING, GEOLOGICAL ENGINEERING - MAP, HYDRAULIC ENGINEERING, INFRASTRUCTURE ENGINEERING, CONSTRUCTION MATERIAL TECHNOLOGY
You have available an analytical microscope with an EDX detector and maximum electron energy of 20 kV. which line would be most suited to analyse for P, Mo, Cr and Os contents.
For each of the following pairs of metals in contact in an
aqueous solution, which metal will corrode?
a. Iron and zinc c. Gold and copper
b. Iron and copper d. Iron and tin
Describe the processes of recovery, recrystallization and grain growth that occur duringannealing of a cold worked polycrystalline material. Supplement your answer with aschematic diagram showing how strength, ductility and grain size may be altered as theseprocesses evolve with increasing temperature