Long-term Creep Crack Growth Behaviour of 316 Stainless Steel.

The effects of compressive plastic pre-strain on the creep deformation and crack growth behaviour of Type 316H stainless steel have been examined. Creep crack growth (CCG) tests have been performed on compact tension specimens of material which had been uniformly pre-strained by 4% and 8% in compression at room temperature. The CCG behaviour of the pre-compressed material has been interpreted in terms of the creep fracture mechanics parameter C* and compared with that of a significant data set of as-received (un-compressed) specimens and with CCG models. All creep testing has been performed at a temperature of 550 °C. High CCG rates, for a given value of C* have been observed for the pre-compressed material, compared with those of as-received material and these data follow the same trends as the long-term CCG data for as-received material. These observations are explained in terms of specimen constraint effects and variations in creep ductility.

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Creep crack growth behaviour in air and sodium for an unstabilized austenitic stainless steel and assessment of evaluation concepts

Engineering Fracture Mechanics ◽

10.1016/0013-7944(82)90005-4 ◽

1982 ◽

Vol 16 (6) ◽

pp. 809-819 ◽

Cited By ~ 9

Author(s):

K. Krompholz ◽

H. Huthmann ◽

E.D. Grosser ◽

J.B. Pierick

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Crack Growth ◽

Creep Crack Growth ◽

Growth Behaviour ◽

Crack Growth Behaviour ◽

Creep Crack

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Study of creep crack growth behaviour of a type 316(N) stainless steel weld and its mechanism

Materials Science and Engineering A ◽

10.1016/j.msea.2018.06.096 ◽

2018 ◽

Vol 731 ◽

pp. 551-560 ◽

Cited By ~ 5

Author(s):

Yatindra Kumar ◽

S. Venugopal ◽

G. Sasikala ◽

P.K. Parida ◽

A. Moitra

Keyword(s):

Stainless Steel ◽

Crack Growth ◽

Creep Crack Growth ◽

Steel Weld ◽

Growth Behaviour ◽

Crack Growth Behaviour ◽

Creep Crack ◽

Stainless Steel Weld

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Creep Crack Growth Prediction of Very Long Term P91 Steel Using Extrapolated Short-Term Uniaxial Creep Data

Volume 6A: Materials and Fabrication ◽

10.1115/pvp2013-97506 ◽

2013 ◽

Cited By ~ 1

Author(s):

S. Maleki ◽

A. Mehmanparast ◽

K. M. Nikbin

Keyword(s):

Crack Growth ◽

Creep Crack Growth ◽

Life Assessment ◽

Short Term ◽

Creep Crack ◽

Uniaxial Creep ◽

Laboratory Test Results ◽

Area Of Concern ◽

Term Creep

Practical time frames in newly developed steels, and technical and financial restrictions in test durations means that extrapolation of short-term laboratory test results to predict long-term high temperature service component failure is an area of concern when conducting a fitness for service or remaining life assessment. Recent literature presenting uniaxial creep and crack growth tests indicate that some materials show lower failure strains during longer term laboratory tests. The constraint based remaining failure ductility based NSW model crack prediction model has been shown to be capable of predicting upper/lower bounds of creep crack growth in a range of steels when data are obtained from relatively short to medium-term laboratory experiments (< 10,000 hours). This paper compares and analyses the response of the NSW model to predict long term creep crack propagation rates using a wide database of modified 9Cr material over s range of temperatures. The paper employs extrapolation methods of available uniaxial data to make viable conservative predictions of crack growth at high temperatures where at present no data is available.

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