Search results

Sir Raymond Streat, C.B.E., Director of The Cotton Board, Manchester, accompanied by Lady Streat. A Vice‐President: F. C. Francis, M.A., F.S.A., Keeper of the Department of Printed Books, British Museum. Honorary Treasurer: J. E. Wright, Institution of Electrical Engineers. Honorary Secretary: Mrs. J. Lancaster‐Jones, B.Sc., Science Librarian, British Council. Chairman of Council: Miss Barbara Kyle, Research Worker, Social Sciences Documentation. Director: Leslie Wilson, M.A.

Interstellar gas passing through the solar system may effect the interplanetary gas, planetary atmospheres and satellite orbits. Interaction of the interstellar and interplanetary gases is considered; a solar system corona may be formed.

The present stage of development of vehicles for space exploration corresponds to some degree to that of the aeroplane in 1905. The programme of the U.S. National Aeronautics and Space Administration in the fields of space science research, applications of Earth satellites, manned exploration of space, and vehicle development are reviewed. International co‐operation in space exploration is desirable, particularly as regards exchange of information, exchanges of scientists, co‐ordination of national programmes, and institution of co‐operative programmes.

Data on the behaviour of materials at high temperatures are needed to improve current designs for missile skins, rocket motors, gas turbines and nuclear applications, but it is only within the last few years that new research tools have been developed to enable materials to bs studied under such conditions in the laboratory. This paper reviews the available techniques, with emphasis placed on the range 2,000–5,000 deg. K.: furnaces (electric resistance, induction, arc, solar), high‐intensity electric arcs, flames, combustion of molten metals, shock tubes, ultra‐high‐frequency are discharges, plasma jets, thermonuclear reactions.

The structural analysis and design of the Douglas Aircraft S‐IV second stage of the C‐1 configuration of the Saturn space exploration vehicle arc discussed; the S‐IV employs four Pratt & Whitney LR‐119 engines burning liquid hydrogen. Design criteria, structural analysis, manufacturing considerations and ground handling problems are placed in perspective in relation to design of the system. The solutions of two problems which proved important (free‐standing capability of an unpressurized large thin shell, and separation of two cyrogenic fluids at different temperatures by a common bulkhead) are presented.

This paper reviews the role of alloying elements in aluminium and alloy fabrication on performance during surface treatment and surface finishing. Such elements may be present in solid solution as fine segregates, strengthening phase and equilibrium phases. For surface treatment and finishes, which generally proceed in the presence of alumina film, knowledge of the processes proceeding at the alloy/film and film/electrolyte interfaces, and those within anodic alumina films, gives rise to the possibility of controlling features of nanoscale dimensions, for improved performance, arises. Its influence on nanotextures at treated surfaces and compositionally and morphologically modified films is explained briefly.

This work was undertaken to examine the possibility of predicting the creep deflexion of magnesium alloy struts from tensile creep data. Creep deflexion tests on magnesium alloy struts at room temperature, under four loads, and lasting 1,000 hours, have been made and interpreted by the use of tensile creep test data for the same magnesium alloy. For strut deflexions small compared with length, and such that plane sections of the strut remain plane, it appears that the following assumptions arc reasonable: (i) during bending and compression creep of the strut similar relations exist between the stress, time and creep strain, as under conditions of simple tensile or compressive creep; and (ii) the rate of creep in any fibre of the strut is a function only of the current stress and time and not of the path by which the current conditions arc reached. These assumptions appear to lead to an average error in computed values of deflexion of an order which for practical purposes is small. It seems reasonably possible that the above mentioned assumptions may be expected to hold for struts of heat resistant material at elevated temperatures such as are met with in practice, provided that the order of deflexion is analogous to that occurring in the current tests, and the creep characteristics of the material are of a generally similar nature.

This I.A.T.A. Symposium held during the I.A.T.A. Technical Conferences at Puerto Rico in April 1953 had as its object the free exchange of views and experience primarily between helicopter manufacturers and civil aircraft operators. The helicopter has been in operation for about ten years. The types available have, however, been in the main small, single‐engined military aircraft, but technical developments now promise fairly large, multi‐engined helicopters suitable for public transport operation. At this juncture, therefore, a conference of this nature is particularly valuable. Of course, definitive conclusions could not be reached, but the results of such a gathering of the most knowledgeable people concerned with helicopter design and operation cannot fail to be of the greatest interest.

Edward A. Smith has been elected to the Board of Acheson Colloids, Ltd., the principal subsidiary of Acheson Industries (Europe) Ltd. Mr. Smith was Technical Manager of Acheson Colloids Ltd. before promotion to this present position of Executive Manager, Acheson Industries (Europe) Ltd. Mr. Smith has published a number of of papers on colloidal graphite including a paper on Solid Lubricants at the one‐day symposium on Lubrication by the Institute of Petroleum in Birmingham in 195G. During the war he was a Major in the R.A.S.C. and responsible for quality control of petroleum products.

The purpose of this paper is to examine new alloys created from Alumix 431 powder and investigate their mechanical and electrochemical properties.

In this study; Alumix-431 alloy samples were prepared using the powder metallurgy (P/M) method applying cold (RT) and warm (50°C and 80°C) compaction methods under pressures of 200 and 250 MPa and were sintered at 600°C in N₂(g) atmosphere. Hardness and density of the samples were measured, and corrosion properties were determined by electrochemical impedance spectroscopy charting polarization curves. Surface characterization was determined by contact angle, scanning electron microscopy/mapping, energy dispersive X-ray spectrometry and X-ray diffractometry images.

Alumix-431 alloys obtained upon compaction at 250 MPa/50 °C had the highest mechanical properties and corrosion resistance and good surface properties. On the surfaces of Alumix-431 alloys, α-Al, MgZn₂, Al₂,CuMg, Al₂,O₃, Al₂MgO₄ phases were recorded.

This study aimed to construct a correlation between mechanical and electrochemical properties of the newly created alloys (prepared under special conditions).