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

Find dmension of strongest rectangular beam, Q.   Find the dimension of str...

Q.   Find the dimension of strongest rectangular beam that can be cut out of log of 25 mm  diameter. Sol .: b 2 +  d 2 = 25 2 d 2 = 25 2 -  b 2 As M/I = σ/y; M =

Design the drainage area, Q. Design the drainage area? Areas beneath eq...

Q. Design the drainage area? Areas beneath equipment or vessels subject to spills or leaks shall have slope drainage area. Every skid shall be provided with floor drains. S

Projection of solids., draw the projection of pentagonal pyramid have 30 mm...

draw the projection of pentagonal pyramid have 30 mm edge and axis 50 mm long having base on hp and an edge of the box parallel to vp

Subcontractor submittals, The Supplier/Subcontractor shall submit, for acce...

The Supplier/Subcontractor shall submit, for acceptance, their Material Traceability and PMI program and procedures, which shall comply with this specification, prior to the sourci

Conversion of pressure reading into kpa, Conve r t following reading of p...

Conve r t following reading of pressure to kPa, supposing that the barometer reads 760mm Hg. (1) 90cm Hg gauge (2) 40cm Hg vacuum (3) 1.2m H 2 O gauge Sol: Given

Steam, what is dry ness fraction?

what is dry ness fraction?

Stresses., temparature stresses in composite bars

temparature stresses in composite bars

Determine the properties of foundation, Determine the Properties of founda...

Determine the Properties of foundation Soil profile together with natural type and properties of each strata will have a bearing on the choice of foundation. The fact that loa

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