Larson-miller parameter, Mechanical Engineering

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

Posted Date: 1/23/2013 2:29:06 AM | Location : United States







Related Discussions:- Larson-miller parameter, Assignment Help, Ask Question on Larson-miller parameter, Get Answer, Expert's Help, Larson-miller parameter Discussions

Write discussion on Larson-miller parameter
Your posts are moderated
Related Questions
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Q. Layout of vessels in plant design? Layout of vessels needs to allow sufficient spacing for instruments, piping, operations, maintenance and firefighting access. Vessels o

Q. Show the types of Changes in project? During the development and execution of a project, the following changes can occur:  Scope of work changes  Cost deviation

determine the shear force and bending moments of 4KN fprce

Write a MATLAB program to find the undamped natural frequencies and modes of an electric car treating it as a four degree of freedom system. Determine the undamped natural frequenc

Main Features of Laser Cutting Process   1) Laser cut kerf is very narrow resulting in material saving. 2) Has very narrow heat affected zone (HAZ) and therefore gives low

Calculate stress to cause failure - Creep Parameters: From creep tests on 713 C alloy the constant C in Larson-Miller parameter is determined as - 85.75. In rupture test a spe

Calculate the magnitude of maximum bending moment: The shear force diagram for the overhanging beam is illustrated in Figure. Draw the loading diagram & bending moment diagram

Aggregate Production Planning: This unit provides the definition and physical significance of aggregate production planning. Further, this is illustrated that how the internal

Maximum permissible stress in belt: Q: A belt 100mm wide and 8.0mm thick are transmitting power at belt speed of 160m/minute.  The angle of lap for smaller pulley is 165º an