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

Calculate diameter of runner, A radically inward flow turbine working under...

A radically inward flow turbine working under a head of 10 m and running at 250 rpm develops 185 KW at the turbine shaft. At inlet tip of the runner vane, the peripheral velocity o

General electric research laboratory, General Electric Research Laboratory:...

General Electric Research Laboratory: Philip Kennicott joined the General Electric Research Laboratory in the year 1961 where he made contributions in the fields of x-ray crys

Foreign inclusions-slag inclusions-oxide films in fusion wel, Foreign Inclu...

Foreign Inclusions   Slag inclusions This is formed due to entrapment of oxides and non metallic solid material in the weld deposit or between the weld metal and base met

Provision of aeration by sparging, Three basic types for microbial systems:...

Three basic types for microbial systems: Porous, nozzle and orifice Porous sparger  Laboratory operation, usually constructed from sintered glass or metal. Disadvantages a

Insulators-ceramics-refractory and abrasive material, Insulators Therm...

Insulators Thermal insulators are essential in industrial practices, domestic and equipment appliances. That type of materials is basically those that do not have free electro

Illustrate dynamically equivalent system, Illustrate with required expressi...

Illustrate with required expression for dynamically equivalent system. Illustrate in detail about the Balancing of Radial Engines.

Kleins construction method , How kleins construction method is different fr...

How kleins construction method is different from other type of graphical method

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