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

Overview of project phases, Q. Overview of Project Phases? Conceptual ...

Q. Overview of Project Phases? Conceptual Engineering Phase The purpose of this phase of work is to develop the Client's proposal to a level of detail adequate to determin

Electric resistance welding, ELECTRIC RESISTANCE WELDING Electric resis...

ELECTRIC RESISTANCE WELDING Electric resistance welding is an important and widely applied non fusion welding process. This write up covers the basic principles of various resi

Calculate amplitude of vibration of machine, A machine of mass one tonne is...

A machine of mass one tonne is acted upon by an external force of 3000 N at a frequency of 1500 rpm. To reduce the effects of vibration, isolator of rubber having a static deflecti

Names of machine involed in making sewing machine table, please tell me nam...

please tell me names of machine involed in making sewing machine table with their work involved...

Hardenability of steel, The hardened layer depth is the measure of harden-a...

The hardened layer depth is the measure of harden-ability. A good harden-ability will sense even thicker sections are uniformly hardened. Conversely a poor harden-ability will gene

Clutch free play-gear complaints, Clutch free play: Check for free play of...

Clutch free play: Check for free play of the clutch lever, it should be within 10-20 mm.

Resistance seam welding, Resistance Seam Welding This is similar to spo...

Resistance Seam Welding This is similar to spot welding except that the copper alloy electrodes are in the form of circular rollers. The overlapping sheets are held under const

What is a clay-characteristics , 1.  What is a soil in an engineering conte...

1.  What is a soil in an engineering context? Define. 2.  (a)  What is a clay? (b) What are the major properties and characteristics of clay? Discuss. (c)  Define the term

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