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

Convolution Integral, For a transfer function graph with h(t) on the y-axis...

For a transfer function graph with h(t) on the y-axis and time in seconds on the x-axis, the h(t)=1 from 0 to 2 seconds, while h(t)=0 everywhere else. How do I graph the unit step

Steps of servicing -washing and drying a motorcycle, Steps of servicing   ...

Steps of servicing   Bring the motorcycle in the washing bay. Clean the motorcycle with recommended soap solution and soft sponge. Wash the motorcycle with a jet o

Machine design 1, Our sir asked us to design a knuckle joint...they gave us...

Our sir asked us to design a knuckle joint...they gave us only the tensile force applied on the joint as 50kn...and told us to find the appropriate material..so what can we use???

Illustrate the euler-poincare formula, The Euler-Poincare Formula  The ...

The Euler-Poincare Formula  The Euler-Poincaré formula describes the relationship of the number of vertices, the number of edges and the number of faces of a manifold. It has b

Concept of absolute thermodynamic temperature scale, (a) Illustrate the con...

(a) Illustrate the concept of absolute thermodynamic temperature scale on the basis of second law. (b) In a Steady flow apparatus , 13.5 KJ of work is done by each kg of fluid.

Beam reactions, i would like to know how much it would cost to for my assig...

i would like to know how much it would cost to for my assignment without the actual graphs but the dimentions and without the assignment being converted into a word document as lon

Equilibrium of body - force acted at any angle, Equilibrium of body - force...

Equilibrium of body - force acted at any angle: Magnitude of force ' p ' which is required to move the body down the plane. When ' p ' is acted with an angle of φ.

External pressure design of unfired pressure vessels, Q. External Pressure ...

Q. External Pressure Design of unfired pressure vessels? Determine requirements for external pressure based on the expected operation of the vessel, and add a suitable operatin

Driveshaft design, The  impeller driveshaft  can either be top driven or bo...

The  impeller driveshaft  can either be top driven or bottom driven. Again there are advantages of each and the choice often varies with scale of operation: (a) Top driven (labo

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