document

Behaviour of fission products in UO₂: Experimental characterization of the Cs-I-UO₂ model system at high temperature

Rochedy, M. (author), Klosek, V. (author), Riglet-Martial, C. (author), Onofri-Marroncle, C. (author), Drouan, D. (author), Reyes, D. (author), Bienvenu, P. (author), Roure, I. (author), Cabié, M. (author)

The interactions of iodine and caesium in UO₂ have been investigated. For this purpose, implanted UO₂ samples were thermally treated (4h at 900°C or 1h at 1200°C) under controlled atmosphere (0.03% H₂O/H₂) and then characterized by several experimental techniques for their structural and chemical...

journal article 2023

document

Verification, validation, and parameter study of a computational model for corrosion pit growth adopting the level-set method. Part II: Stress corrosion

Fayezioghani, A. (author), Dekker, R. (author), Sluys, Lambertus J. (author)

Structural components in corrosive environments such as pipelines, bridges, aircrafts, and turbines are imposed to stress corrosion. A stress corrosion model for pit growth should a) accurately consider the electrochemistry of the corrosion process, b) properly deal with the moving interface between solid and electrolyte, and c) effectively...

journal article 2022

document

Titanium alloy corrosion fatigue crack growth rates prediction: Peridynamics based numerical approach

Karpenko, O. (author), Oterkus, Selda (author), Oterkus, Erkan (author)

This study presents a numerical approach for modelling the Corrosion Fatigue Crack Growth (CFCG) in conventional casting and additively manufactured Ti6Al4V alloys. The proposed numerical model, based on Peridynamics (PD), combines the PD Fatigue Crack Growth (FCG) model and PD diffusion model in order to couple the mechanical and diffusion...

journal article 2022

document

Corrosion effects on soda lime glass

Veer, F.A. (author), Rodichev, Y.M. (author)

Although soda lime glass is the most common used transparent material in architecture, little is known about the corrosion effects on long term strength and the interaction between corrosion and defects. Extensive testing on soda lime bars under different environmental conditions and different degrees of damage has resulted in a inore clear...

conference paper 2010

document

Further evaluation of the Ascor test for stress corrosion testing of aluminium alloys

Schra, L. (author), Wanhill, R.J.H. (author)

In 1991 a simple automated stress corrosion testing method called the ASCOR (Automated Stress corrosion Ring) test was developed to test aluminium alloys according to ASTM specification G49. The present investigation concentrated on evaluating two aspects of the test method: The SCC initiation criterion (2 % load decrease). The possibility of...

report 1997

document

The influence of testing parameters on stress corrosion crack growth in the high strength aluminium alloy 7010-T651

Schra, L. (author)

An interlaboratory testing programme to evaluate the rising displacement test for stress corrosion crack (SCO growth investigations was carried out within the framework of the "Measurements and Testing" programme of the European Community under BCR contract nr. MATI CT 930038. The contribution of the NLR to the project consisted of testing of...

report 1996

document

The ASCOR test: a simple automated method for stress corrosion testing of aluminium alloys

Schra, L. (author), Groep, F.F. (author)

Alternate immersion stress corrosion testing according to ASTM specification G44 has proven to be representative for aluminium alloys in natural environments resembling the actual environmental conditions for aircraft. A simple automated stress corrosion testing method called the ASCOR (Automated Stress COrrosion Ring) test was developed to test...

report 1991

document

Stress corrosion resistance of damage tolerant aluminium-lithium sheet materials

Schra, L. (author), Kolkman, H.J. (author)

The SCC resistances of three damage tolerant aluminium sheet materials were determined by means of the ASCOR (Automated Stress COrrosion Ring) test. The conventional damage tolerant sheet material 2024-T3 was used as reference. The SCC resistance of 8090-T81 turned out to be only slightly lower than the SCC resistance of 2024-T3. In contrast,...

report 1991

document

Spacecraft sustained load fracture control

Wanhill, R.J.H. (author)

Sustained load fracture control is a problem of particular importance for manned spacecraft and orbital stations, owing to the long design lives and limited opportunities for repair. The current ESA approach Is based on screening out materials shown to be susceptible to stress corrosion cracking (SCC) from smooth specimen tests. This approach...

report 1991

document

Outdoor corrosion testing of aluminium-lithium alloys

Schra, L. (author), 't Hart, W.G.J. (author), Boogers, J.A.M. (author)

Outdoor corrosion and stress corrosion tests were conducted on Al-Li plate and sheet materials for 3 and almost 5 years respectively. The results can be summarized as follows: Corrosion: Peak aged XXXA-T651 (8090-T651) exhibited greater exfoliation corrosion resistance than 2024-T351 and 2324-T39 plate. 2091-T3 and 2024-T3 sheet were found to be...

report 1990

document

Effects of cooling rate on corrosion properties of high strength aluminium alloys under atmospheric conditions

Schra, L. (author), 't Hart, W.G.J. (author)

Long-term outdoor exposure tests were done to investigate the effect of cooling rate on corrosion and stress corrosion properties of extruded rods of the high strength aluminium alloys 2024-T4, 2023-T6, 7075-T6 and 7075-T73. The 2024 alloy exhibited a high susceptibility to SCC irrespective of best treatment and cooling rate, whereas 7075-T6 was...

report 1990

document

A test plan for sustained load fracture control verification

Wanhill, R.J.H. (author)

An example test plan for sustained load fracture control verification is presented. Two sustained load fracture problems have been chosen: stress corrosion cracking of titanium alloy Ti-6Al-4V, and gaseous hydrogen embrittlement of the nickel-base superalloy Inconel 718. The plan is worked out in detail, including materials and heat treatments,...

report 1989

document

Spacecraft sustained load fracture control

Wanhill, R.J.H. (author)

The opportunities for sustained load fracture control in spacecraft are indicated. Emphasis is given to verification by small-scale laboratory testing.

report 1989

document

Damage tolerance and durability evaluation of aluminium-lithium alloys

Wanhill, R.J.H. (author), Schra, L. (author), 't Hart, W.G.J. (author)

New impetus to continued use of alximinium alloys in major structural areas of aircraft has been given by the development of aluminium-lithium alloys. However, qualification of these new materials for service requires extensive testing and evaluation, preferably in international cooperative programmes. The evaluation of aluminium-lithium alloys...

report 1989

document

Long-term outdoor stress corrosion testing of overaged 7000 series aluminium alloys

Schra, L. (author), 't Hart, W.G.J. (author)

Long-term outdoor stress corrosion tests were executed on overaged 7000 series aluminium alloy plate and forgings. Plate material of the alloys 7010-T7651, 7010-T7451 and 7075-T7351 exhibited an excellent resistance to SCC. PM alloy X7091-T7E69 forgings combined a higher strength with superior SCC resistance as compared to IM alloy forgings. The...

report 1988

document

Engineering property comparisons of PM and IM aluminium alloy forgings

Wanhill, R.J.H. (author), Schra, L. (author)

Engineering properties of the PM alloy 7091-T7E69 and the IM alloys 7075-T73, 7175-T736, 7010-T736 and 7050-T736 were compared. The properties considered were strength, fracture toughness, fatigue strength, fatigue crack propagation resistance under constant amplitude and spectrum loading, stress corrosion crack initiation and propagation...

report 1983

document

Fracture toughness and corrosion properties of the aluminium plate alloys 7010-T651 and 7150-T6E189

't Hart, W.G.J. (author), Schra, L. (author)

A comparative experimental investigation was done on the advanced plate alloys 7010-T651 from ALCAN and 7150-T6E189 from ALCOA. The mechanical properties, fracture toughness and corrosion properties were determined. The most notable finding was the excellent fracture toughness of alloy 7150-T6E189 combined with a high tensile strength. The...

report 1982

document

Effect of cooling rate on corrosion properties and microstructure of high strength aluminium alloys

't Hart, W.G.J. (author), Kolkman, H.J. (author), Schra, L. (author)

The Jominy end-quench test was applied to rods of the alximinium alloys T010 and X TO9I to obtain a decreasing cooling rate over the length of the rods. After heat treating to a high strength T6 and an overaged TT condition the corrosion properties and the microstructure were determined related to the cooling rate. No influence of cooling rate...

report 1982

document

Engineering property comparisons of PM alloy X7091-T7E69 and IM alloy forgings

't Hart, W.G.J. (author), Schra, L. (author)

The engineering properties of PM alloy X7091-T7E69 forgings were compared with those of forgings of the IM alloys 7075-T73, 7175-T736, 7050-T736 and 7010-T736. The properties considered were: strength, fracture toughness, fatigue crack propagation under constant amplitude and flight simulation loading, stress corrosion crack initiation and...

report 1982

document

Influence of environments on constant displacement stress corrosion crack growth in high strength aluminium alloys

Schra, L. (author), Faber, J. (author)

An experimental investigation was carried out into the applicability of various corrosive environments for stress corrosion crack propagation testing of high strength aluminium alloys using double cantilever beam specimens. Testing under atmospheric conditions was used as a reference. It was found that stress corrosion crack growth under...

report 1981