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

Batteries and alternative sources of energy, Illustrate six typical applica...

Illustrate six typical application of primary cells. (b) Illustrate six typical applications of secondary cells. (c) Illustrate the advantages of a fuel cell over a conventional

Breakwater , Let consider the breakwater configuration shown in the figure ...

Let consider the breakwater configuration shown in the figure below. The incident wave conditions at the breakwater are a wave height of 1.5m, wave period of 7.0s and a wave crest

Objectives of entrepreneurship development , Objectives After studying...

Objectives After studying this unit, you should be able to weigh the merits and demerits of becoming an entrepreneur, discuss the opportunities and financial assis

Agitation and aeration systems, Careful consideration of the bioreactor agi...

Careful consideration of the bioreactor agitation and aeration system is required in order to maintain a homogeneous environment and provide sufficient oxygen transfer rates to mee

Heat exchangers - air-conditioning guidelines, Q. Heat Exchangers - air-con...

Q. Heat Exchangers - air-conditioning guidelines? Location, size and capacity clearly indicated. Control valves indicated. Space for tube removal, keep space clear of pipes, va

determine the mass of air, An amount of air contained in a rigid container...

An amount of air contained in a rigid container is at  T1 = 300 K.  After adding 450 kJ of heat, the air temperature increases to  T2 = 430 K.  Determine the mass of air,  m [kg],

Work done - thermodynamics, Work done - thermodynamics: A free expansi...

Work done - thermodynamics: A free expansion process is a process in which system expands freely without experience any resistance. I.E. is constant at the time of state chang

Computer aided visualization, There are various methods to visualize the ...

There are various methods to visualize the design process which can be summarized as given below: a. An automated drafting tool and presentation of graphics. b. A means

Boiler, what is boiler ? what is hard & soft water? how can we convert raw ...

what is boiler ? what is hard & soft water? how can we convert raw water into soft water?

Steam turbine types, Is bleed necessary in condensing and back pressure bot...

Is bleed necessary in condensing and back pressure both the turbine? What is the use of bleed in steam turbine? What is the basic difference in condensing and backpressure turb

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