Larson-miller parameter, Mechanical Engineering

Assignment Help:

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


Related Discussions:- Larson-miller parameter

Pulleys, what do you mean by law of belting and also explain the crowning o...

what do you mean by law of belting and also explain the crowning of pulleys ?

Kinematics, derive an expression for range along iclined palne

derive an expression for range along iclined palne

Classification of system - thermodynamics, Classification of system - Therm...

Classification of system - Thermodynamics: (1) Kitchen refrigerator, (2) Ceiling fan (3) Thermometer in mouth (4) Air compressor (5) Pressure Cooker (6) Carburetor (7) R

Thermodynamics, discus the method to finding the width of impeller blades i...

discus the method to finding the width of impeller blades in a rotary air compressor

Define non - consumable electrode, Q. Define Non - consumable electrode? ...

Q. Define Non - consumable electrode? These types of electrodes are prepared from high melting point materials. Mainly carbon, pure tungsten and its alloy are used for electrod

Determine the stresses in each rod, A rigid bar ABCD is hinged at A and sup...

A rigid bar ABCD is hinged at A and supported by a bronze rod, 2m long, and a steel rod 1m long as shown in figure A load of 80 KN is applied at end B. Determine the stresses in ea

Dry saturated steam - thermodynamics, Dry Saturated Steam - thermodynamics:...

Dry Saturated Steam - thermodynamics: A dry saturated steam is single phase medium. It does not have any water particle. It can be obtained on complete evaporation of water at

Governor, sensitivity of governors

sensitivity of governors

Evaluate the actual over all efficiency of the turbine, (a) An engine uses ...

(a) An engine uses 6.5 Kg of oil per hr of a calorific value 30,000 kJ / kg. If the B. P. of the engine is 22KW and mechanical efficiency 85%. Calculate (i) Brake thermal eff

Evaluate the power output of turbine, Evaluate the power output of turbine:...

Evaluate the power output of turbine: Q: A turbine in steam power plant operating under steady state conditions receives the superheated steam at 3MPa and 350ºC at the rate o

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd