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

Cyclone dip tube length calculation., how can we calcute the length of dip ...

how can we calcute the length of dip tube and what are its effects on cyclone efficiency if we change its length

Steps of engine oil replacement and top-up, Engine Oil Replacement and top ...

Engine Oil Replacement and top up steps • The engine oil should be changed only when motorcycle has run through the prescribed kilometers. • Change the engine oil every 4000 k

Illustrate critical damping, Illustrate any three of the following : (i)...

Illustrate any three of the following : (i) Critical Damping (ii) Logarithmic decrement (iii) Vibration Isolation (iv) Equivalent stiffness of spring in series and in p

Difference between the open and closed systems, Provide short answers to th...

Provide short answers to the following questions: a)   What the necessary condition for a heat transfer process to occur? b)   What is a difference between the steady state c

Thermodynamics, can u please explain me d concept of 2nd law of thermodynam...

can u please explain me d concept of 2nd law of thermodynamics. I am not so sure about it ??

Newton''s second and third law of motion, Newton's second and  third law o...

Newton's second and  third law of motion: Newton's second law of motion: If resultant force is acting on particle is not zero, and then acceleration of particle will be prop

Find minimum time for a vehicle to go from 0 to 60 mph, For a few of the fo...

For a few of the following problems the constant acceleration is due to gravity and will be notated as a = g = 32 ft/sec 2 . 'g' perhaps positive or negative depending on the conte

Find out the average resistance of the ground, Find out the average resista...

Find out the average resistance of the ground: In a construction of pile-driving for building, a pile driver of mass 25 kg freely drops through a height of 3 metre on the top

Break mean effective pressure - thermodynamics, Brea k Mean Effective Pr...

Brea k Mean Effective Pressure (P bm ): Likewise, the brake mean effective pressure is given by   i p       = indicated power (kW) bp     = Break Powder (kW

Explain the hydrostatic pressure, Explain the Hydrostatic Pressure Hydr...

Explain the Hydrostatic Pressure Hydrostatic Pressure also called Pressure because of Depth of a Fluid. It is required to define the pressure exerted by a static fluid column o

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