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

Access and maintenance for pumps, Pumps should be grouped together with goo...

Pumps should be grouped together with good maintenance access to the motor, and good personnel access to seals and suction / discharge valves. Maintenance access should allow for r

Autocad screen, Autocad screen- The autocad Screen basic chapter of Aut...

Autocad screen- The autocad Screen basic chapter of Autocad course it will show the display of Autocad on computer screen

Determine the maximum allowable tensile strength, 1. The linkage system bel...

1. The linkage system below consists of two bars A & B plus 4 linkages. Each linkage has a square cross section. The allowable tensile strength of all members is 200 MPa, the allow

Determine the mean radius of an open coiled spring, Determine the mean radi...

Determine the mean radius of an open coiled spring: Determine the mean radius of an open coiled spring of helix angle of 38 o , to give a vertical displacement of 20 mm and an

Horizontal vessels and vertical vessels, Q. Horizontal Vessels and Vertical...

Q. Horizontal Vessels and Vertical Vessels? Horizontal Vessels A horizontal vessel, designed to support a full weight load of water, shall be tested while resting on its sup

Firing rate demand for steam generator, Q. Firing Rate Demand for Steam Gen...

Q. Firing Rate Demand for Steam Generator? The firing rate for each Steam Generator is proportional to the feedwater flowing into that Steam Generator. Thus, the sum of the pa

Thermodynamics.., what is critical pressure, triple point, degree of super ...

what is critical pressure, triple point, degree of super heat...

Belt conveyors, Figure aside shows a belt conveyors which consists of...

Figure aside shows a belt conveyors which consists of endless belt. It has a power driven pulley at one end which moves the belt or downward flow of materials. General

Can you explain limitations of eulers theory, (a) Can you explain limitatio...

(a) Can you explain limitations of Euler's theory (b) Derive a mathematical expression to determine the crippling load of a column with on end fixed and other end hinged (c)

Heat removal factor, 1.Calculate the heat-removal factor for a collector ha...

1.Calculate the heat-removal factor for a collector having an overall heat-losscoefficient of 6 W/m2K and constructed of aluminum fins and tubes. Tube-to-tube centered distance is

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