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Wanhill, R.J.H. (author), Boogers, J.A.M. (author), Huisman, H.N. (author), Ottens, H.H. (author)In 1995 an air supply manifold support rod from a high-performance turbofan engine failed by bending fatigue. The rod material was Inconel 718, operating at about 550° in an air environment. Diagnostic aspects of the failure (fatigue in bending, Stage I and Stage II fatigue fracture characteristics, and interference colours due to fracture...report 1996
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Wanhill, R.J.H. (author), Boogers, J.A.M. (author)An investigation was made of dwell crack growth, including the effects of peak loads and underloads, in Inconel 718 forged pancake material at 600ºC in an air environment. This investigation was done as part of the NLR's analytical workshare in the European collaborative programme lEPG TA31: Lifing Concepts for Military Aero-Engine Components,...report 1993
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Schra, L. (author), 't Hart, W.G.J. (author), Boogers, J.A.M. (author)Outdoor corrosion and stress corrosion tests were conducted on AJl-Li plate and sheet materials for 3 and almost 5 years respectively.report 1990
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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
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Wanhill, R.J.H. (author), Mom, A.J.A. (author), Hersbach, H.J.C. (author), Kool, G.A. (author), Boogers, J.A.M. (author)The NLR has two high velocity burner rigs for oxidation and hot corrosion testing. A large, custom-built rig was commissioned in 1977 to enable actual components to be tested. A smaller rig for specimen testing was purchased in 1986. Experience with these rigs over the last decade is reviewed.report 1989
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van Leeuwen, H.P. (author), de Rijk, P. (author), Boogers, J.A.M. (author), Huisman, H.N. (author), Wanhill, R.J.H. (author)Circumferentially notched round specimens of 4340 type steel have been plated in a galvanic bath known to be embrittling. The specimens were reclaimed by stripping and baking. Half the specimens were replated in a non-embrittling bath. Reclamation did not remove all traces of hydrogen embrittlement, but raised the threshold stress to such a...report 1979
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- van Leeuwen, H.P. (author), Schra, L. (author), Boogers, J.A.M. (author) report 1972