Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

00372 LABORATORY TESTS REPRODUCE TRANSGRANULAR STRESS CORROSION CRACKING OBSERVED IN FIELD

Picture for 00372 LABORATORY TESTS REPRODUCE TRANSGRANULAR
Available for download
Product Number: 51300-00372-SG
ISBN: 00372 2000 CP
Author: G.Gabetta, S.Di Liberto and A.Bennardo
Industry: Energy Generation
$0.00
$20.00
$20.00
Slow Strain Rate (SSR) and Load Control (LC) tests were performed aiming to investigate Transgranular Stress Corrosion Cracking (TGSCC) which can occur on the outside surface of underground pipelines where the protective coating is damaged and where the ground water is in direct contact with the pipe surface. A comparison between the two loading methodologies is proposed with the purpose to identify peculiar conditions, which allow to better reproducing TGSCC as observed in field. Fractographic examinations of C(T) (Compact Tension) notched specimens cut from pipeline steel and tested in an environment simulating field conditions, showed that laboratory tests were able to reproduce the "quasi cleavage" fracture morphology observed in the field. This morphology suggests, as claimed by many authors, that hydrogen concentration at the crack tip is involved in TGSCC. By operating under LC condition, subcritical crack grow generates fracture surfaces with a very short affected zone and a very brittle morphology. In SSR condition, on the contrary, the subcritical crack zones were one order of magnitude larger, but their morphology was less brittle (more dimples), indicating that Load Control methodology (with respect to Slow Strain Rate) offers a better separation between mechanical and environmental components both contributing to crack grow. Integration of the two techniques allows a better understanding of the material behaviour. Keywords: Transgranular Stress Corrosion Cracking (TGSCC), Load Control (LC), Slow Strain Rate (SSR), Quasi Cleavage, Gas Transmission, Environmental Assisted Cracking (EAC).
Slow Strain Rate (SSR) and Load Control (LC) tests were performed aiming to investigate Transgranular Stress Corrosion Cracking (TGSCC) which can occur on the outside surface of underground pipelines where the protective coating is damaged and where the ground water is in direct contact with the pipe surface. A comparison between the two loading methodologies is proposed with the purpose to identify peculiar conditions, which allow to better reproducing TGSCC as observed in field. Fractographic examinations of C(T) (Compact Tension) notched specimens cut from pipeline steel and tested in an environment simulating field conditions, showed that laboratory tests were able to reproduce the "quasi cleavage" fracture morphology observed in the field. This morphology suggests, as claimed by many authors, that hydrogen concentration at the crack tip is involved in TGSCC. By operating under LC condition, subcritical crack grow generates fracture surfaces with a very short affected zone and a very brittle morphology. In SSR condition, on the contrary, the subcritical crack zones were one order of magnitude larger, but their morphology was less brittle (more dimples), indicating that Load Control methodology (with respect to Slow Strain Rate) offers a better separation between mechanical and environmental components both contributing to crack grow. Integration of the two techniques allows a better understanding of the material behaviour. Keywords: Transgranular Stress Corrosion Cracking (TGSCC), Load Control (LC), Slow Strain Rate (SSR), Quasi Cleavage, Gas Transmission, Environmental Assisted Cracking (EAC).
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 00327 THE PERFORMANCE OF NEW VOLATILE
Available for download

00327 THE PERFORMANCE OF NEW VOLATILE OXYGEN SCAVENGER AND ITS FIELD APPLICATION IN BOILER SYSTEMS

Product Number: 51300-00327-SG
ISBN: 00327 2000 CP
Author: Y. Shimura, K. Uchida, T. Sato and S. Taya
$20.00
Picture for 00363 A REVIEW OF STRESS CORROSION CRACKING OF
Available for download

00363 A REVIEW OF STRESS CORROSION CRACKING OF HIGH PRESSURE GAS PIPELINES

Product Number: 51300-00363-SG
ISBN: 00636 2000 CP
Author: R.N.Parkins
$20.00
Picture for 00222 STRESS CORROSION CRACK GROWTH IN ALLOY
Available for download

00222 STRESS CORROSION CRACK GROWTH IN ALLOY 600 EXPOSED TO PWR AND BWR ENVIRONMENTS

Product Number: 51300-00222-SG
ISBN: 00222 2000 CP
Author: Markus O. Speidel and Ruth Magdowski
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support