TC10 Environmentally Assisted Cracking
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Co-Chairs |
Dr W Dietzel |
GKSS-Forschungszentrum Geesthacht, |
|
Co-Chairs |
Dr G Gabetta |
ENIRICERCHE, |
|
Secretary |
Dr Bohdan Lonyuk |
Contact E-mails: b.lonyuk@tnw.tudelft.nl |
|
TC10 Subcommittee on |
Prof. Hryhoriy M. Nykyforchyn |
Contact E-mails: nykyfor@ipm.lviv.ua |
OBJECTIVES AND STRUCTURE
TC 10 was established in 1991 with the objective to merge research experience in the area of:
- fracture mechanics as a method of failure assessment, and
- environmental degradation of materials.
The work of TC 10 is focused to the development and application of fracture mechanics test and evaluation techniques to investigate problems of stress corrosion cracking and hydrogen embrittlement of engineering materials.
The Sub-committee on "Hydrogen Degradation", founded in 1995, is now chaired by Prof.
Hryhoriy M. Nykyforchyn (nykyfor@ipm.lviv.ua) and works in particular on:
- investigations of materials degradation under long term loading affected by temperature changes and by hydrogen/hydrogen sulphide containing media (gas and petroleum refining plants, offshore structures etc.),
- investigations of hydrogen degradation in metal welded joints under long term loading,
- methods for diagnosing hydrogen degradation in structural elements and for degradation prevention.
ACTIVITIES
TC10 and its SC are jointly organising workshops on "Fracture Mechanics Approach to Corrosion Assisted Cracking" at regular intervals (8 workshops so far) and organise sessions related to problems of environmentally assisted cracking/hydrogen degradation at international conferences and symposia. Two joint European research projects were successfully organised and coordinated by TC 10 under the Measurements & Testing and the INCO/COPERNICUS programs of the EC.
TC/SC have close links with the Technical Task Force Hydrogen Embrittlement (TTF7) of the European Pressure Equipment Research Council, EPERC, the Working Party Environment Sensitive Fracture of the European Federation of Corrosion, EFC, the Working Group 2 Stress Corrosion Cracking of ISO TC 156, Corrosion of Metals and Alloys, and with ASTM Committees on Corrosion and on Environmentally Assisted Cracking, respectively.
Future Activities will - amongst others - be to identify/develop suitable assessment methods for problems of SCC/hydrogen embrittlement as well as to promote the application of the results in procedures such as Risk Based Inspection and Integrity Management and to enhance the links with industry.
A joint TC/SC meeting was held in Crackow, Poland, on the ocasion of ECF 14 (minutes).
TC10 UPDATE 2007
MINUTES of the ESIS TC10 and TC13
TC10 UPDATE 2006
ACTIVITIES
No formal meetings of the TC were held in 2005. However, the TC10 has been involved in a number of activities:
- The successful submission of a proposal for a new research project to the Science and Technology Centre of the Ukraine (STCU)
which had been prepared by the Institute of Applied Problems of Mathematics and Mechanics (IAPMM) and the Karpenko Physico-Mechanical
Institute (KPMI), both of the National Academy of Sciences of the Ukraine. The project entitled "Monitoring, Technical Diagnostics and
Remaining Life Prediction for the Oil Transit Systems" is related to the long-term service of oil and gas pipelines and will address the
problems arising from a loss of workability, the existence of cracks, and the degradation of the mechanical properties of the steels used
for these pipeline systems.
The project includes the development and application of appropriate technical monitoring and diagnostics tools to assess the technical
state of pipelines and other oil transportation equipment by detecting corrosion-mechanical damages at an early stage, and evaluating
possible changes in the mechanical properties of the materials involved which lead to material degradation. It will also comprise the
development of suitable methods for the prediction of residual lifetimes of oil transportation systems and the establishment of new
criteria for the workability of pipelines and related equipment, and their application to existing structures. As an additional outcome
of the project, appropriate modifications to existing normative documents pertaining to the strength, durability, and reliability analysis of
existing pipeline systems for oil transportation are expected.
The project is closely linked to the objectives of ESIS TC 10 and will hence be actively supported by members of the TC.
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According to the strategy discussed at the last TC10 Workshop (October 2004) on "EAC in High Strength (Pipeline) Steels",
the TC has established links to the European Pressure Research Group, EPRG, on the occasion of a Research Fund Coal and Steel (RFCS/ECSC)
dissemination forum on "X100 Steel Pipe for High Pressure Gas Transportation" held at the Salzgitter Mannesmann Forschung in Duisburg in
April 2005.
CALENDAR 2006
At the 16th European Conference of Fracture, ECF16, to be held on July 3-7, 2006, in Alexandroupolis, Greece, TC10 has
organised a Special Symposium on Environment Assisted Fracture. The symposium will have about 20 presentations and is scheduled
for Tuesday, 4 July; Linked to this symposium, a technical meeting of TC10 will be held.
Prof. Nykyforchyn celebrated his 60th birthday.
The ESIS TC10 wants to honour him with the following poster:
The project includes the development and application of appropriate technical monitoring and diagnostics tools to assess the technical state of pipelines and other oil transportation equipment by detecting corrosion-mechanical damages at an early stage, and evaluating possible changes in the mechanical properties of the materials involved which lead to material degradation. It will also comprise the development of suitable methods for the prediction of residual lifetimes of oil transportation systems and the establishment of new criteria for the workability of pipelines and related equipment, and their application to existing structures. As an additional outcome of the project, appropriate modifications to existing normative documents pertaining to the strength, durability, and reliability analysis of existing pipeline systems for oil transportation are expected.
The project is closely linked to the objectives of ESIS TC 10 and will hence be actively supported by members of the TC.