Solution-Typical of creep at the low temperatures

Typical of creep at the low temperatures

Assignment Help Mechanical Engineering

Reference no: EM13887485

During a stress relief anneal, creep occurs, which converts elastic strains (and therefore stresses) into plastic strains. The decrease in stress should be t>σ = -Eε, or dσ/dt = -E dε/dt = -E ε?. Assume that the stress relief anneal is done in a temperature range where the basic creep rate is given by dε/dt = ε and that the residual stress before annealing was σ o. = Cσm

A. If m = 5, as is typical of creep at the low temperatures used for stress relieving, σ o = 5000 psi, E = 10 × 106 psi, and C = 6 × 10-22(psi)-5/h at the annealing temperature, how long would it take for the stress to drop to 2500 psi?

B. For the same temperature, how long would it take the stress to drop to 1000 psi?

Reference no: EM13887485

Questions Cloud

Elastic moduli of cubic alsb : Estimate the ratio of the elastic moduli of cubic AlSb and cubic ZnSe. Both have the sphalerite structure. The lattice parameters are 0.6136 and 0.5669 nm, respectively.

Reasonable cause for filing a delinquent return : Assuming that Ms. Cross can't show reasonable cause for filing a delinquent return, compute the late filing and late payment penalty. How would your answer change if she did not mail her return until November 21?

Higher level of understanding of accounting standards : Demonstrate a higher level of understanding of accounting standards and theoretical and philosophical approaches, as they apply to the resolution of more complex accounting problems - Making sense of company executives' compensation and employee be..

Anyone have examples of a balance scorecards : Anyone have examples of a balance scorecards with Objectives, Measures, Target, Action and Relationship to other Objectives

Typical of creep at the low temperatures : If m = 5, as is typical of creep at the low temperatures used for stress relieving, σ o = 5000 psi, E = 10 × 106 psi, and C = 6 × 10-22(psi)-5/h at the annealing temperature, how long would it take for the stress to drop to 2500 psi?

Reliable equipment restoration incorporated : FACT SITUATION: Reliable Equipment Restoration Incorporated (hereafter RER) is a generalpartnership engaged in the business of buying, selling and restoring used heavy equipment. RER's originalpartners were Roger Martin and Claus Kent. They formed ..

Average residual stress in the layer : After machining, the length was found to be 10.004 in. What was the average residual stress in the layer that was machined away? For the brass, E = 110 GPa. For simplicity, neglect the Poisson effects.

Differences between the nasdaq market and the nyse market : differences between the NASDAQ market and the NYSE market

Magnesium the coef?cient of thermal expansion : For polycrystalline magnesium the coef?cient of thermal expansion is 25.2 × 10-6/?C and Young's modulus is 68.4 GPa. Parallel to the c-axis of a single crystal the coef?cient of thermal expansion is 24.3 × 10-6/? and Young's modulus is 80.9 GPa.

User Account

All Pages

Typical of creep at the low temperatures

Reference no: EM13887485

Reference no: EM13887485

Questions Cloud

Reviews

Write a Review

Mechanical Engineering Questions & Answers

Package design

Mechanical engineering questions

Automatic control

Write a paper on boyle''s law

Verify the law for parallelogram of forces

Discharge pressure of the compressor

The Case for Global Accounting Standards

Wind turbine

Advanced design methodologies

Design of absorption column and the cooler

Determine the maximum total bending moment

Force of the water on the gate

Assured A++ Grade

Academics

Major Subjects

Majors

Get In Touch

TERMS & POLICIES

HELP & SUPPORT