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

Bevel gear and shaft analysis, I have a bevel gear and shaft and I want to ...

I have a bevel gear and shaft and I want to know the maximum load that can be applied on it. also I have no information about it, what kind of information is needed for this calcul

Determine shear plane angle, The following data was obtained from an orthog...

The following data was obtained from an orthogonal cutting test : Rake angle = 20o, Depth of cut = 6 mm Feed rate = 025 mm/rev Chip length before cutting = 29.4 mm Chip

Lubrication complaints by repairing of motorcycle , Lubrication Complaints ...

Lubrication Complaints If the engine oil level is too low, check for the following things: External oil leaks Worn out piston rings Worn out valve guide and/o

Illustrate about plant type and process, Q. Illustrate about Plant Type and...

Q. Illustrate about Plant Type and Process? Plant layout is influenced by the type of plant (both the industry and technology utilized) and the kind of process units and associ

What is hydrostatic extrusion, Q. What is Hydrostatic extrusion? • In t...

Q. What is Hydrostatic extrusion? • In the hydrostatic extrusion process the billet is completely surrounded by a pressurized liquid, except where the billet contacts the die.

Cases of equilibrium , Cases of equilibrium: What are cases of equili...

Cases of equilibrium: What are cases of equilibrium? Sol.: As a result of the acting forces, the body may be having one of the following states: (1) The body can mo

Construction activities for plant, Construction Activities for plant Co...

Construction Activities for plant Construction activities, such as shoring and bracing of excavations, lifting and rigging activities and scaffolding need to be considered as p

Determine the forces in the members, A truss of 12 m span is loaded as show...

A truss of 12 m span is loaded as shown in figure below. Determine the forces in the members of the truss by method of sections.

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