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

Problems on cantilever truss, Problem s on Cantilever Truss: In the c...

Problem s on Cantilever Truss: In the case of cantilever trusses, it is not required to determine the support reactions. The forces in members of cantilever truss are obtaine

Find out bulk modulus, Find out bulk modulus: A steel bar of 25 mm dia...

Find out bulk modulus: A steel bar of 25 mm diameter was tested on a gauge length of 250 cm in tension and in torsion. A tensile load of 50 kN generated an extension of 0.13 m

Plate clutch warpage-clutch slipping, Plate clutch warpage: Place plate cl...

Plate clutch warpage: Place plate clutch on surface plate and check for warpage. Ensure that0.20 mm feeler gauge does not slide freely.

Beam, calculate the vertical reaction at A in Newtons

calculate the vertical reaction at A in Newtons

Gdfgfgaf, dgdsgsfd sfdsvdsfsdf dsfsdgsgdsfsada sfdsfdsvsdfsd sgghdfgsgfa

dgdsgsfd sfdsvdsfsdf dsfsdgsgdsfsada sfdsfdsvsdfsd sgghdfgsgfa

Steam , how to calculate the volume of HFO burn to produice steam?

how to calculate the volume of HFO burn to produice steam?

Calculate the shear stress , A hollow circular shaft has an internal diamet...

A hollow circular shaft has an internal diameter of 48 mm and an external diameter of 54 mm. Calculate the shear stress produced at the outer and inner surfaces of the shaft when t

Explain Functions of springs as on following points, 1. store energy 2. app...

1. store energy 2. apply force on a body 3. balance force between two bodies 4. absorb vibrations of body

Batch furnaces, Batch Furnaces: An insulated, the heating system, cha...

Batch Furnaces: An insulated, the heating system, chamber for placing the job, and a door or various doors for placing the job in place are the necessity of these furnaces. T

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