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

Inspection of fasteners of motorcycle, Inspection of Fasteners: The motorc...

Inspection of Fasteners: The motorcycle carries number of nuts and bolts. They should be properly tightened for the smooth running of motorcycle. All fasteners are checked

Engine management system, A preamble to engine management systems for IC en...

A preamble to engine management systems for IC engines objectives, functionalities and main features

Short circuiting transfer, Short Circuiting Transfer The short circuiti...

Short Circuiting Transfer The short circuiting transfer  occurs when the welding current and the arc voltage is low. Metal is transferred from the electrode to the work only wh

Determine the maximum stress in the beam, For the beam shown below, we need...

For the beam shown below, we need to determine: (i) The support reactions R L and R R                                                                            (ii) The s

Plot the root locus diagram for a system, Plot the root locus diagram for a...

Plot the root locus diagram for a system whose open loop transfer function is Evaluate the range of values for K for system to be stable.

Calculate the average heat transfer coefficient, Air at 1 atm, 300K, and Re...

Air at 1 atm, 300K, and Re = 50,000: a. Flow across the cylinder with a diameter of 10 cm. b. Flow inside a tube with a diameter of 10 cm. c. flow along the flat plate of

Engineering design, 1) State five factors that must be considered when choo...

1) State five factors that must be considered when choosing a material. Discuss the importance to the engineer of each of these factors. 2) An engineer is planning to design a s

Steps of centrifugal filter and screen filter cleaning, Centrifugal Filter ...

Centrifugal Filter and Screen Filter Cleaning :   Oil may contain impurities. Since the oil passes through all the engine parts, the impurities may harm the parts and cause imprope

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