Larson-miller parameter, Mechanical Engineering

Larson-Miller parameter:

For material of example of calculate life in hours at temperature of 900oC, and at σ = 20 MPa.

Solution

Larson-Miller parameter is given by

m = T (ln t + 85.75)

Use  T = 900 + 273 = 1173 K

But        m = 16.75 × 104

From Example 1.7 at σ = 20 MPa

∴          1173 (ln t + 85.75) = 16.75 × 104

∴          ln t =(16.75 × 104 /1173 )- 85.75

                    = 142.8 - 85.75 = 57.05

∴          t = 5.95 × 1024  hours

Posted Date: 1/23/2013 2:29:06 AM | Location : United States







Related Discussions:- Larson-miller parameter, Assignment Help, Ask Question on Larson-miller parameter, Get Answer, Expert's Help, Larson-miller parameter Discussions

Write discussion on Larson-miller parameter
Your posts are moderated
Related Questions
(a) Illustrate the several kinds of chips formed during metal cutting with neat diagrams. (b) Why is Titanium Nitride a valuable tool coating? (c) Give the differences betwee

Q. Describe Dry and wet parting materials? Dry parting materials: These are applied by dusting. These include : charcoal, ground bone and limestone, lycopodium(a yellow veget

mathematical expression of moment of inertia

Hazardous Waste and Material Standards Each hazardous site must be examined and evaluated for its characteristics before workers are allowed entry. This will pre decide an

when 2 bodies are connected by a string show the direction of acceleration

An electric heating element is rated at 4.0kW when connected to a single phase 240Vrms, 50 Hz AC supply, and is known to have a power factor of 0.833 lagging. 1. Calculate the c

Remove cover left crank case and check for leakage: Before attending oil seal leakage check if any leak is there in the highlighted points - Neutral switch "o" ring leak, Shifter

Q. Calculation of seismic response loads? The seismic design requirements and the specification of criteria variables for the calculation of seismic response loads for the desi

If Fuel Consumption is High Causes of Problem Remedy   Incorrect electrode gap of spark plug Worn out electrodes o

Calculate the critical crack length: A wide plate of mild steel is subjected to uniform tensile load causing a stress of 100 MPa. Calculate the critical crack length in the ce