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

Vectors, Following sets of the three forces act on a body,. In which case r...

Following sets of the three forces act on a body,. In which case resultant cannot be zero? 1) 10N, 10N, 10N 2)10N, 10N, 20N 3)10N, 20N, 20N 4010N, 20N, 40N Ans)      In 4th

What are commercial aircraft mfg key success factors, Conduct an industry &...

Conduct an industry & a 5-Forces analysis for BOEING AND AIRBUS. w/focus on commercial aircraft mfg (Hint: extend POV to travel preferences now & future, & review BOE/Air's POVs on

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

MECHNICS, FIND THE RESULTANT OF THE SYSTEM OF FORCES AND THE POINTS WHERE T...

FIND THE RESULTANT OF THE SYSTEM OF FORCES AND THE POINTS WHERE THEY CUT THE OX AND OY AXIS.

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

T-s n p-h diagram, can anybody tells me about t-s n p-h diagram? just about...

can anybody tells me about t-s n p-h diagram? just about the concept and working principle.can anybody help me? thank you. :)

Arc strikes-metallurgical defects, Arc strikes Represent any localised ...

Arc strikes Represent any localised heat affected zone caused by an arc. Arc strike tends to produce hardening particularly in high carbon steels and alloy steels. Grinding of

Describe the term critical insulation thickness, Q. Describe the term ‘Crit...

Q. Describe the term ‘Critical Insulation thickness'. What is its significance? Derive an expression for the critical insulation radius of a spherical system. A bar of square cr

Rubber, Rubber Rubber is a plastic that is largely derived from natura...

Rubber Rubber is a plastic that is largely derived from natural sources and utilized in a modified form. For automobile tyres, Rubber is well identified as material. Rubber re

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