Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 7.10, Problem 38AAP
If DS CM 247 LC alloy (middle graph of Fig. 7.31) is subjected to a temperature of 960°C for 3 years, what is the maximum stress that it can support without rupturing?
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QUESTION 2
(a) Stress and strain diagram of 316L stainless steel is plotted in Figure Q2 (a). Determine and label
the following terms:
(i)
Proportional limit point (0,ɛ)
(ii)
Yield point (0,ɛ)
(iii)
Ultimate point (0,8)
(iv)
Fracture point (0,8)
(iv)
Modulus of elasticity or Young's modulus (E)
700
400
600
500
300
400
200
6 300
200
E 100
100
0.005
0.01
0.015
0.02
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
Strain, E (mm/mm)
Strain, E (mm/mm)
Figure Q2 (a)
(b) A short post AB constructed from a hollow circular tube of aluminium, supports a compressive
load of 116 kN as in Figure Q2 (b). The inner and outer diameters of the tube are di=100 mm and
dz=112 mm, respectively, and its length is 400 mm. The shortening of the post due to the load is
measured as 0.3 mm. Determine the compressive stress and strain in the post.
Note: the weight of the post is neglected.
116 KN
A
400 mm
Figure Q2 (b)
Stress, o (MPa)
Stress, a (MPa)
Q2) Cylindrical rod with original diameter (12mm) and original length (70 mm) made of
1020 Hot-rolled steel alloy which their yield stress (207 MPa) and Young modulus (210
GPa). Tensile test was carried on this rod and it's broken under (27.5 KN) force with final
diameter (10mm) and final length (84 mm). Calculate:
(A) 1- Engineering fracture stress
(B) If you know that the Brinell hardness for this alloy (HB=111). Estimate the tensile
strength of this alloy in (MPa).
2- True fracture stress.
(C) 1- Toughness gauge.
2- The percentage of elongation.
Q3: Two material were tested in tension, the first is aluminum
alloy has stress-strain curve define by 300 MPa was
fracture after 35% reduction in area. The other a copper alloy has
stress-strain curve define by=100+120 MPa was fracture
after 98% elongation. Which alloy have more toughness? Support
your answer with the sketch.?
Chapter 7 Solutions
Foundations of Materials Science and Engineering
Ch. 7.10 - What are the characteristics of the surface of a...Ch. 7.10 - Prob. 2KCPCh. 7.10 - Prob. 3KCPCh. 7.10 - Prob. 4KCPCh. 7.10 - Prob. 5KCPCh. 7.10 - Prob. 6KCPCh. 7.10 - Prob. 7KCPCh. 7.10 - Prob. 8KCPCh. 7.10 - Prob. 9KCPCh. 7.10 - How does the carbon content of a plain-carbon...
Ch. 7.10 - Describe a metal fatigue failure.Ch. 7.10 - What two distinct types of surface areas are...Ch. 7.10 - Prob. 13KCPCh. 7.10 - Prob. 14KCPCh. 7.10 - Prob. 15KCPCh. 7.10 - Describe the four basic structural changes that...Ch. 7.10 - Describe the four major factors that affect the...Ch. 7.10 - Prob. 18KCPCh. 7.10 - Prob. 19KCPCh. 7.10 - Prob. 20KCPCh. 7.10 - Prob. 21KCPCh. 7.10 - Determine the critical crack length for a through...Ch. 7.10 - Determine the critical crack length for a through...Ch. 7.10 - The critical stress intensity (KIC) for a material...Ch. 7.10 - What is the largest size (in mm) of internal...Ch. 7.10 - A Ti-6Al-4V alloy plate contains an internal...Ch. 7.10 - Using the equation KIC=fa, plot the fracture...Ch. 7.10 - (a) Determine the critical crack length (mm) for a...Ch. 7.10 - A fatigue test is made with a maximum stress of 25...Ch. 7.10 - A fatigue test is made with a mean stress of...Ch. 7.10 - A large, flat plate is subjected to...Ch. 7.10 - Prob. 32AAPCh. 7.10 - Refer to Problem 7.31: Compute the final critical...Ch. 7.10 - Prob. 34AAPCh. 7.10 - Prob. 35AAPCh. 7.10 - Equiaxed MAR-M 247 alloy (Fig. 7.31) is used to...Ch. 7.10 - Prob. 37AAPCh. 7.10 - If DS CM 247 LC alloy (middle graph of Fig. 7.31)...Ch. 7.10 - Prob. 39AAPCh. 7.10 - Prob. 40AAPCh. 7.10 - Prob. 41SEPCh. 7.10 - Prob. 42SEPCh. 7.10 - A Charpy V-notch specimen is tested by the...Ch. 7.10 - Prob. 44SEPCh. 7.10 - Prob. 45SEPCh. 7.10 - Prob. 46SEPCh. 7.10 - Prob. 47SEPCh. 7.10 - Prob. 48SEPCh. 7.10 - Prob. 49SEPCh. 7.10 - Prob. 50SEPCh. 7.10 - While driving your car, a small pebble hits your...Ch. 7.10 - Prob. 52SEPCh. 7.10 - Prob. 53SEPCh. 7.10 - Prob. 54SEPCh. 7.10 - Prob. 56SEPCh. 7.10 - Prob. 57SEPCh. 7.10 - Prob. 58SEPCh. 7.10 - Prob. 59SEPCh. 7.10 - The components in Figure P7.60 are high-strength...
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