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- Regarding annealing, choose the right answer (One or more): The actual annealing time must be long enough to allow for any necessary transformation reactions that may occur Annealing can be performed to release internal stresses of the material The main purpose of annealing is to decrease or restore material's ductility Time isn't a significant parameter in annealing process If the rate of temperature change is too great, temperature gradients and internal stresses may be induced that may lead to warping or even crackingDefine build-up and draw down test??Whereas, if the coldworked radius is twenty mm, now what is the radius before being deformed if the ductility percent EL of a coldworked element Cu cylidrical specimen is twenty-five percent?
- What is a consequence of strain hardening?(v) The two sketches below represent the microstructure of two specimens with identical average composition but subjected to different annealing treatments. a A is stronger and more ductile than B, b. B is stronger and more ductile than A, A is stronger but more brittle than B, B is stronger but more brittle than A, e. none of the above. c. d. A BWhen do cold cracks develop?
- 5-7 Discussions * What are the main factors affecting on the impact test? And, How?What is the effect of solid solution strengthening on Tensile strength (TS) and Ductility (%EL,%AR)?Metal y (mJ/m)n Slip Character (a) Discuss why Planar slip is associated with a small stacking fault energy, as shown in the table below. (b) Sketch the shape of a single-crystal shear stress-strain curve for Al and Stainless Steel, (1label) stage I, II and III portions of deformation, which one end stage II and begin stage III sooner?. S.Steel <10 -0.45 Planar Cu -90 -0.3 Planar/ wayy Al -250 -0.15 wayy