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ED Brittle failure is characterised by: Select one: O a. Dimples in the fracture surface O b. Little or no elongation to failure O c. A significant reduction in cross sectional area d. Cavity coalescence

ED Brittle failure is characterised by: Select one: O a. Dimples in the fracture surface O b. Little or no elongation to failure O c. A significant reduction in cross sectional area d. Cavity coalescence

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Brittle failure is characterised by: Select one: (3 a. Dimples in the fracture surface O b. Little or no elongation to failure O c. A significant reduction in cross sectional area O d. Cavity coalescence O e. The component breaking into few pieces 12 of 12 yield stress (MPa) 90 8 8 8 80 8 8 40 30 A 200 Select one: O a. 252.6 MPa O C. O b. 310.9 MPa 80.5 MPa d. 165.2 MPa 2 O e. 198.9 MPa 400 600 grain size d (microns) Consider the graph below for 3 test samples A, B and C of the same metal composition which have been cold-worked, but to different extents. If you had to sort the samples by the degree of cold- working they have undergone, how would you rank them? 800 Stress (MPa) O b. 600 500 The graph below shows the yield stress for a polycrystalline metal as a function of the grain size of the metal. The point A is (10 microns, 100 MPa) and B is (1000 microns, 28 MPa). Using this data, calculate what is the closest numerical match to the yield stress at 2 microns. 400 B 300 1000 200 100 Select one: O a. OF 0 A<C<B O c. A<B<C C<B<A O d. C<A<B A B 0.05 0.1 0.15 0.2 Strain 0.25
Transcribed Image Text:Brittle failure is characterised by: Select one: (3 a. Dimples in the fracture surface O b. Little or no elongation to failure O c. A significant reduction in cross sectional area O d. Cavity coalescence O e. The component breaking into few pieces 12 of 12 yield stress (MPa) 90 8 8 8 80 8 8 40 30 A 200 Select one: O a. 252.6 MPa O C. O b. 310.9 MPa 80.5 MPa d. 165.2 MPa 2 O e. 198.9 MPa 400 600 grain size d (microns) Consider the graph below for 3 test samples A, B and C of the same metal composition which have been cold-worked, but to different extents. If you had to sort the samples by the degree of cold- working they have undergone, how would you rank them? 800 Stress (MPa) O b. 600 500 The graph below shows the yield stress for a polycrystalline metal as a function of the grain size of the metal. The point A is (10 microns, 100 MPa) and B is (1000 microns, 28 MPa). Using this data, calculate what is the closest numerical match to the yield stress at 2 microns. 400 B 300 1000 200 100 Select one: O a. OF 0 A<C<B O c. A<B<C C<B<A O d. C<A<B A B 0.05 0.1 0.15 0.2 Strain 0.25
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