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Wanhill, R.J.H. (author)A fractographic examination was made of unnotched aged and solution treated Ti-8A1 specimens subjected to fluctuating tension fatigue in air, 3% aqueous NaCl and methanol-HC1. Crack initiation in air and 3% NaCl probably occurred from reversed slip. Crack initiation in methanol-HC1 was by intergranular dissolution. Corrosion along slip bands was...report 1970
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Wanhill, R.J.H. (author)A fractographic examination was made of unnotched aged and solution treated Ti-8AI specimens subjected to fluctuating tension fatigue in air, 3% aqueous NaCI, and methanol-HCI. Crack initiation in air and 3% NaCI probably occurred from reversed slip. Crack initiation in methanol-HCI was by intergranular dissolution. Corrosion along slip bands...report 1972
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- Wanhill, R.J.H. (author), de Rijk, P. (author) report 1973
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- Wanhill, R.J.H. (author) report 1973
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- Wanhill, R.J.H. (author) report 1973
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- Wanhill, R.J.H. (author) report 1973
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- Wanhill, R.J.H. (author), de Rijk, P. (author) report 1973
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de Graaf, E.A.B. (author), Wanhill, R.J.H. (author), de Koning, A.U. (author)The effects of shot and glass bead peening and hole expansion on the direct stress fatigue life of 7079-1'652 aliiminium alloy specimens are considered. Three types of specimens were employed: unnotched, notched by a central hole and notched at comers. Shot peening was only slightly beneficial for high cycle fatigue, and then only for comer...report 1974
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- Wanhill, R.J.H. (author), Meulman, A.E. (author), van der Vet, W.J. (author) report 1974
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- Wanhill, R.J.H. (author) report 1974
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Wanhill, R.J.H. (author)The requirements and problems of high temperature materials in gas turbines are reviewed, with specific reference to turbine discs, blades, vanes and combustion cans. The mechanical and environmental property requirements of these components are discussed, followed by an overview of the types of materials used. Lastly, there is a summary of the...report 1975
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Wanhill, R.J.H. (author), Schijve, J. (author), Jacobs, F.A. (author), Schra, L. (author)The following text is given in the format required for presentation at the Conference and Exhibition "Fatigue Testing and Design", to be held in the City University, London, 5-9 April 1976. The report gives a comparison between the fatigue performances of several sheet and forging materials under gust spectrum loading representing the lower wing...report 1975
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Wanhill, R.J.H. (author), van Gestel, G.F.J.A. (author)Fatigue crack propagation in 2024-T3, 7075-T6 and 7475-T76I sheet was investigated for crack growth rates in the in-service crack detection regime. I t appears that for a high performance aircraft the crack propagation llife to failure from the assiamed in-service detection limit may he longer for 7475-T76I sheet than for 2024-T3 or 7075-T6...report 1975
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Wanhill, R.J.H. (author)A study was made of environmental fatigue crack propagation in 2.5 mm thick Ti-6A1-4V sheet conforming to AMS 4911, and 2.2 mm thick IMI 3l8 conforming to BS TA 10. The environments were dry argon, normal air, distilled water and 3.5 ^ aqueous NaCl. There were three alloy/orientation combinations: Ti-6A1-4V L-T, IMI 3l8 L-T and IMI 318 T-L. Test...report 1975
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Wanhill, R.J.H. (author), Log, C.J. (author)Large lugs are integral to many aircraft components. They are customarily regarded as safe-life items, with consequently low design stress levels. However, safe-life design is becoming increasingly unacceptahle in view of developments in damage tolerant design. Current specifications for damage tolerance recognise the potential applicability of...report 1976
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Wanhill, R.J.H. (author), Schra, L. (author)The effects of flat to slant fracture transitions on flight simulation fatigue crack propagation in specimens of 7O5O aluminium alloy forgings are discussed. For specimens containing flat, shearlipped, or full slant fractures at similar crack lengths the crack resistance (R curve) approach appears to provide an explanation for differences in the...report 1976
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- Wanhill, R.J.H. (author), Jacobs, F.A. (author), Schra, L. (author) report 1976
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Wanhill, R.J.H. (author)Environmental effects on the fatigue strength and crack propagation resistance of aluminium and titanium alloys are reviewed. Particular attention is paid to the influence of air and aqueous environments on aerospace structural materials. Recommendations are made for future research activity, notably with regard to material selection and service...report 1977
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Wanhill, R.J.H. (author)Flight simulation fatigu-e crack propagation tests were carried out on 2024-T3, 7475-T761 and mill annealed Ti-6A1-4V sheet in thicknesses up to 3 miri and representative for transport aircraft lower wing skin stiffened panels of end load capacities 1.5 and 3 MN/m. The performance of 2024-T3 was much superior, owing mainly to greater retardation...report 1977
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Wanhill, R.J.H. (author)Flight simulation fatigue crack propagation tests were carried out on 2024-T3, 7475-T761 and mill annealed Ti-6A1-4V sheet in thicknesses up to 3 nim and representative for traJisport aircraft lower wing skin stiffened panels of end load capacities 1.5 and 3 MN/m. There was a significant effect of sheet thickness on crack propagation. Thinner...report 1977