Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Chapter 9, Problem 9.6P
(a)
To determine
The stage II creep rate of the nickel at given temperature and tensile stress.
(b)
To determine
The stage II creep rate of the nickel at given temperature and tensile stress.
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Q.24 During a high cycle fatigue test, a metallic specimen is subjected to cyclic loading with
a mean stress of +140 MPa, and a minimum stress of -70 MPa. The R-ratio (minimum
stress to maximum stress) for this cyclic loading is (round off to one decimal
place)
6. Steady-state creep rate data are given below for nickel at 1000°C (1273 K). If it is known that the
activation energy for creep is 272,000 J/mol, compute the steady-state creep rate at a
temperature of 850°C (1123 K) and a stress level of 25 MPa (3625 psi).
o[MPa (psi)]
10
15 (2175)
10
4.5 (650)
During a creep test (constant stress equal to 3.5 MPa) a material has an initial strain of
10 and a strain of 2 x 10* after 30 days. The same material was also submitted to a
relaxation test (constant strain equal to 1.5 x 104). During the relaxation test, determine the
stress after 30 days. Assume that the material follows the Maxwell model.
4
X
Chapter 9 Solutions
Materials Science And Engineering Properties
Ch. 9 - Prob. 1CQCh. 9 - Prob. 2CQCh. 9 - Prob. 3CQCh. 9 - Prob. 4CQCh. 9 - Prob. 5CQCh. 9 - Prob. 6CQCh. 9 - Prob. 7CQCh. 9 - Prob. 8CQCh. 9 - Prob. 9CQCh. 9 - Prob. 10CQ
Ch. 9 - Prob. 11CQCh. 9 - Prob. 12CQCh. 9 - Prob. 13CQCh. 9 - At temperatures above the equi-cohesive...Ch. 9 - Prob. 15CQCh. 9 - Prob. 16CQCh. 9 - Prob. 17CQCh. 9 - Prob. 18CQCh. 9 - Prob. 19CQCh. 9 - Prob. 20CQCh. 9 - Prob. 21CQCh. 9 - Prob. 22CQCh. 9 - Prob. 23CQCh. 9 - Prob. 24CQCh. 9 - Prob. 25CQCh. 9 - Prob. 26CQCh. 9 - Prob. 27CQCh. 9 - Prob. 28CQCh. 9 - Prob. 29CQCh. 9 - Prob. 30CQCh. 9 - Prob. 31CQCh. 9 - Prob. 32CQCh. 9 - Prob. 33CQCh. 9 - Prob. 34CQCh. 9 - Prob. 35CQCh. 9 - Prob. 1ETSQCh. 9 - Prob. 2ETSQCh. 9 - Prob. 3ETSQCh. 9 - Prob. 4ETSQCh. 9 - Prob. 5ETSQCh. 9 - Prob. 6ETSQCh. 9 - Prob. 7ETSQCh. 9 - Prob. 8ETSQCh. 9 - Prob. 9ETSQCh. 9 - Prob. 10ETSQCh. 9 - Prob. 11ETSQCh. 9 - Prob. 12ETSQCh. 9 - Prob. 9.1PCh. 9 - Prob. 9.2PCh. 9 - Prob. 9.3PCh. 9 - Prob. 9.4PCh. 9 - Prob. 9.5PCh. 9 - Prob. 9.6PCh. 9 - Prob. 9.7PCh. 9 - Prob. 9.8PCh. 9 - Prob. 9.9PCh. 9 - Prob. 9.10PCh. 9 - For silver at a tensile stress of 7 MPa and a...Ch. 9 - For germanium at a tensile stress of 410 MPa and a...Ch. 9 - Prob. 9.13PCh. 9 - Prob. 9.14PCh. 9 - Prob. 9.15PCh. 9 - Prob. 9.16PCh. 9 - Prob. 9.17PCh. 9 - Prob. 9.18PCh. 9 - Prob. 9.19PCh. 9 - Prob. 9.20PCh. 9 - Prob. 9.21PCh. 9 - Prob. 9.22P
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- At an axial load of 25 kN, a 45-mm-wide by 20-mm-thick polyimide polymer bar elongates 2.9 mm while the bar width contracts 0.19 mm. The bar is 220 mm long. At the 25-kN load, the stress in the polymer bar is less than its proportional limit. Determine (a) the modulus of elasticity. (b) Poisson's ratio. (c) the change in the bar thickness. Answers: (a) E= (b) v= (c) Athickness= i i GPa mmarrow_forwardDuring a high cycle fatigue test, a metallic specimen is subjected to cyclic loading with a mean stress of +140 MPa, and a minimum stress of -70 MPa. What is the R- ratio (minimum stress to maximum stress) for this cyclic loading?arrow_forwardQ-3 The following creep data were taken on an aluminum alloy at 400°C (750°F) and a constant stress of 25 MPa (3660 psi). Plot the data as strain versus time, then determine the steady-state or minimum creep rate. Time (min) Time Strain (min) Strain 0.00 18 0.82 2 0.22 20 0.88 22 24 4 0.34 0.95 6 0.41 1.03 8 0.48 26 1.12 10 0.55 28 1.22 12 0.62 30 1.36 14 0.68 32 1.53 16 0.75 34 1.77arrow_forward
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