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

Friction is undesirable, Friction is Undesirable: A friction is undesi...

Friction is Undesirable: A friction is undesirable at the time of ice skating or when the block is lifted or put down on the truck with the help of inclined plane. If friction

Thermodynamics, describe equivalence of kelvin planck and clausious stateme...

describe equivalence of kelvin planck and clausious statement

Properties of aluminium alloys, Properties of Aluminium Alloys: Among...

Properties of Aluminium Alloys: Among the different properties of aluminium alloys given are notable as: (a) Low density as 2.7 gm/cc (b) Elevated electrical and therma

Explain the deformation processes, Deformation Processes In these proce...

Deformation Processes In these processes, the material is plastically deformed (hot or cold) under the action of an external force, to produce the required shape. No material i

Enterprise resource planning, Enterprise Resource Planning: ERP system...

Enterprise Resource Planning: ERP systems work from a common, central database. ERP integrates all of the compnay's information systems so that each functional area is utilizi

MATLAB CODE, I NEED A GENERALIZED CODE FOR VAPOUR COMPRESSION REFRIGERATION...

I NEED A GENERALIZED CODE FOR VAPOUR COMPRESSION REFRIGERATION SYSTEM?

Determine the force, Determine the force: Determine the force P needed...

Determine the force: Determine the force P needed to start block B illustrated in Figure moving to the right if the coefficient of friction is 0.3 for all surfaces of contact.

Answer of the question, Classification of dynamometers, with thein neat sk...

Classification of dynamometers, with thein neat sketch with working ?

How can you implement permeability test, Q. How can you implement Permeabil...

Q. How can you implement Permeability test  As already defined, permeability of porosity of the moulding sand is the message of its ability to permit air to flow through it.

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