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

Special tool and cleaning of part general service tips , Special Tool: Use...

Special Tool: Use special tools wherever applicable. Special tools are designed to dismantle or assemble a specific part or assemblies without causing damage to them. Cleaning

Determine couple - homogeneous cylinder, Determine couple - Homogeneous cyl...

Determine couple - Homogeneous cylinder: Homogeneous cylinder having weight W rests on horizontal floor in contact with wall (Fig ure given below ). If the coefficient of

List and explain the five stages of change, List and explain the five stage...

List and explain the five stages of change. What stage are you at in regards to your own exercise program and explain why? (50-100 words) Refer to page 4 of The Essential Guide to

Tensile testing of Fibre, What is the relation between break point elastici...

What is the relation between break point elasticity and Yield point elasticity.?

Maximum efficiency, A jet strikes tangentially a smooth curved vane moving ...

A jet strikes tangentially a smooth curved vane moving in the similar direction as the jet, and the jet gets reversed in the direction. Prove that the maximum efficiency is slightl

Wrought aluminium alloys, Wrought Aluminium Alloys Extrusion ingots an...

Wrought Aluminium Alloys Extrusion ingots and sheets are cast through semi-continuous direct chill method. The sheet ingots are scalped in which about 12 millimeter of ingot s

Determine the centroidal moment of inertia, Determine the centroidal moment...

Determine the centroidal moment of inertia: Determine the centroidal moment of inertia of a thin flat disc shown in Figure which is having a mass m kg. By using the parallel a

TMA 2, A temperature control process has a first-order response with a step...

A temperature control process has a first-order response with a step response time of 12 seconds. In selecting a temperature sensor for the control system for the process, for what

Explain the height adjustment and extension of augers, Normal 0 ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

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