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

Gear box, how we can design a shaft for gear box

how we can design a shaft for gear box

Types of lubricant , Types of Lubricant: Lubricant is a material which cir...

Types of Lubricant: Lubricant is a material which circulates through the lubrication network to provide lubrication at various points. Lubricants are classified in three forms: Fl

Hazardous and safe areas in plant layout, Q. Hazardous and Safe Areas in pl...

Q. Hazardous and Safe Areas in plant layout? Plants implicitly involve identifiable hazards in respect to the environment, location and presence of potentially explosive materi

Corollaries of first law of thermodynamics, Corollaries of first law of the...

Corollaries of first law of thermodynamics: First law of thermodynamics has significant corollaries. Cor ollary 1: (First Law for process). There exists property of

Stenght of Material, Give the assumption of pure torsion derivation of shea...

Give the assumption of pure torsion derivation of shear stress produced in circular shaft subjected to torsion

Eccentricity-unbalance-balancing, Eccentricity : This is distance between...

Eccentricity : This is distance between the axis of rotation and CG of mass. Unbalance : This is the product of mass and eccentricity. Balancing : This is

Example of simple exponential smoothing, Example of simple exponential smoo...

Example of simple exponential smoothing: A TV manufacturer utilizes simple exponential smoothing with α = 0.1 to forecast demand. For the first week of March, the forecast was

Stroke -engine terminology , Stroke: The nominal distance through which a...

Stroke: The nominal distance through which a working piston moves between two successive reversals of its direction of motion is called the stroke and is designated by the letter

Discuss relative demerits and merits of belt, Discuss relative demerits and...

Discuss relative demerits and merits of belt, rope and chain drive for transmission of power and find the condition for transmitting the maximum power in a flat belt drive.

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

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

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