The following data were obtained for creep of a polycrystalline oxide having a grain size of...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
The following data were obtained for creep of a polycrystalline oxide having a grain size of 10 m. Stress (MPa) 10 20 30 40 50 60 70 80 90 100 at T = 1700 K 2.0 10-8 4.0 10-8 6.0 10-8 8.0 10-8 2.3 10-7 5.0 x 10-7 9.9 10-7 1.8 x 10-6 3.1 x 10-6 4.9 10-6 Strain rate () at T = 1810 K 7.0 10-8 1.4 x 10-7 2.1 x 10-7 2.8 x 10-7 8.0 10-7 1.8 x 10-6 3.5 x 10-6 6.3 x 10-6 1.1 x 10-5 1.7 x 10-5 at T=1940 K 4.2 x 10-7 8.4 x 10-7 1.3 x 10-6 1.7 x 10-6 4.8 x 10-6 1.1 x 10-5 2.1 x 10-5 3.8 x 10-5 6.5 x 10-5 1.0 10-4 a Plot (logarithmic coordinates) creep rate vs. stress for the three temperatures. Iden- tify on your plot the stress regions that correspond to diffusional creep and those that correspond to power-law creep. b Does the diffusional creep region correspond to Nabarro-Herring creep or to Coble creep? (Hint: Recall that the activation energies for NH creep and power-law creep are the same, and greater than that for Coble creep.) e On the graph you developed for part (a), plot creep rate vs. stress at 1700 K for this material if the grain size were increased to 20 m. The following data were obtained for creep of a polycrystalline oxide having a grain size of 10 m. Stress (MPa) 10 20 30 40 50 60 70 80 90 100 at T = 1700 K 2.0 10-8 4.0 10-8 6.0 10-8 8.0 10-8 2.3 10-7 5.0 x 10-7 9.9 10-7 1.8 x 10-6 3.1 x 10-6 4.9 10-6 Strain rate () at T = 1810 K 7.0 10-8 1.4 x 10-7 2.1 x 10-7 2.8 x 10-7 8.0 10-7 1.8 x 10-6 3.5 x 10-6 6.3 x 10-6 1.1 x 10-5 1.7 x 10-5 at T=1940 K 4.2 x 10-7 8.4 x 10-7 1.3 x 10-6 1.7 x 10-6 4.8 x 10-6 1.1 x 10-5 2.1 x 10-5 3.8 x 10-5 6.5 x 10-5 1.0 10-4 a Plot (logarithmic coordinates) creep rate vs. stress for the three temperatures. Iden- tify on your plot the stress regions that correspond to diffusional creep and those that correspond to power-law creep. b Does the diffusional creep region correspond to Nabarro-Herring creep or to Coble creep? (Hint: Recall that the activation energies for NH creep and power-law creep are the same, and greater than that for Coble creep.) e On the graph you developed for part (a), plot creep rate vs. stress at 1700 K for this material if the grain size were increased to 20 m.
Expert Answer:
Related Book For
Posted Date:
Students also viewed these chemistry questions
-
The following spectra for A and B correspond to two structural isomers. The NMR singlet at (1.16 in spectrum A disappears when the sample is shaken with D2O.The singlet at (0.6 ppm in the spectrum of...
-
Describe the process of evaluating investments whose cash flow are in foreign currencies?
-
In Exercises 7192, find and simplify the difference quotient f(x +h)-f(x) h -, h = 0
-
Address the increased security issues currently faced by enterprises and define the statement "Mobile devices should be the doorway and not the destination"
-
Consider the arrangement of the three black surfaces shown, where A 1 is small compared to A 2 or A 3 . Determine the value of F 13 . Calculate the net radiation heat transfer from A 1 to A 3 if A 1...
-
For several years running, the Over-the-Top Buffet, a Las Vegas Burburr all-you-can-eat attraction, has been voted the best buffet by several publications. The Over-the-Top Buffet offers a seemingly...
-
Oregon Corporation has filed a voluntary petition to reorganize under Chapter 11 of the Bankruptcy Reform Act. Its creditors are considering an attempt to force liquidation. The company currently...
-
Show work in terms of time lines or formulas ( No Excel) 4. A investment project generates the following incremental cash inflows over the next 5 years, C = $1.5 million, C = $1.3 million, C3 = $1...
-
f. If there were $800 of dividends declared but not yet received by Maloney Co's from their investments, what adjustment would need to be made to Maloney's revenue?
-
A corporation has Gross Revenue of $5,200,000 and all of the expenses incurred are $2,700,000. Now, calculate the State Taxable Income for the Tax Year 2020 with itemized deductions and non-itemized...
-
A block oscillating on a spring has period \(T=2.0 \mathrm{~s}\). a. What is the period if the block's mass is doubled? b. What is the period if the value of the spring constant is quadrupled? c....
-
Suppose for an i.i.d. sample of size \(n\), the disease status, \(d_{i}\), is MCAR with the probability of each \(d_{i}\) being observed given by \(\pi=0.75\). (a) Show that \(\frac{1}{n} \sum_{d_{i}...
-
To determine an athlete's body fat, she is weighed first in air and then again while she's completely underwater, as discussed on page
-
True or False: Annual worth analysis is the most popular DCF measure of economic worth.
-
True or False: AW can be applied as either a ranking method or as an incremental method.
-
Many RDBMSS, induding Access, do not create a unique index on the PK attributets) when you dedare the PK Oa TRUE O b. FALSE
-
A circular concrete shaft liner with Youngs modulus of 3.4 million psi, Poissons ratio of 0.25, unconfined compressive strength 3,500 psi and tensile strength 350 psi is loaded to the verge of...
-
Propose mechanisms for the three imine-forming reactions just shown.
-
1. From what you remember of electronegativities, show the direction of the dipole moments of the following bonds. 2. In each case, predict whether the dipole moment is relatively large...
-
For each of the following compounds, 1. Give the IUPAC name. 2. Give the common name (if possible). 3. Classify the compound as a methyl, primary, secondary, or tertiary halide. (a) (CH3)2CHCH2Cl (b)...
-
Alma, Inc., manufactures high-pressure cleaners for large transportation companies. It uses standard costing and allocates variable and fixed manufacturing overhead based on machine-hours. For each...
-
Michael Roberts is a cost accountant and business analyst for Darby Design Company (DDC), which manufactures expensive brass doorknobs. DDC uses two direct-cost categories: direct materials and...
-
Omegas Fleet Feet, Inc., produces dance shoes for stores all over the world. While the pairs of shoes are boxed individually, they are crated and shipped in batches. The shipping department records...
Study smarter with the SolutionInn App