Light Alloy Piston Materials

“The Technology of Magnesium and its Alloys,” by Beck, p. 267 (published by Magnesium Election, Ltd.).

British Patent Specifications Nos. 449, 983, 489, 478.

For references to the most modern theories on age hardening see Rohner's “A Theory of the Age Hardening of Aluminium-Copper Alloys Based on Vacant Lattice Sites” (Journal of the Institute of Metals, 1, 1947, No. 1050).

“Practical Metallurgy,” by Sachs, p. 72.

“Metallography of Aluminium Alloys,” by Mondolfo, p. 31. (This book is the latest and most authoritative work on the alloying constituents of aluminium alloys.).

Air Ministry Memorandum No. 215.

Cast Lo-Ex often has 2 · 4 per cent Ni, but we have found the 1 per cent Ni version to be superior, and, in this, we agree with German practice in E.C.124.

“Gas in Light Alloys,” by Eastwood.

Compare with work of B.N.F.M.R.A. for hot tearing (Journal of the Institute of Metals. May, 1946, 72, p. 343).

Provisional Patent Specification No. 3069/47.

For methods of determining residual stresses and references to work done, see “Practical Metallurgy,” by Sachs, p. 179.

Siebel E. Steurer W. Stahli , “Prufung von Leichtmetall-Leigierung bei hoheren Temperaturen unter Gleichzeitiger Ruhender und Schwingender Beansprufung,” Z. Metallkunde, 7, 1942 (7), 145–150. (Previous publications have given the Lo-Ex results as appertaining to duralumin; this is incorrect.).

“Prufung und Leichtmetallen bei hoherer Temperatur,” Wellinger Karl Keil Eust . (Note.—The R.R.59 had 1–67 per cent Fe, but otherwise conformed to specification.) For further information, see B.N.F.M.R.A. Research Report No. 58. (These results put the alloys in much the same order as those quoted.) Also M.A.P. Scientific and Technical Memo. No. Cl/42 (confidential).

Results quoted from work by the authors on compositions as given in Table III. The best comparative work is given in:—(a) “The Metals Handbook,” of the A.S.M., 1268, pp. 1275, 1283; (b) the unpublished work of the B.N.F.M.R.A.

Own results quoted in most cases, but should be compared with:—(a) M.A.P. Scientific and Technical Memo Cl/42; (b) Hiduminium Technical Data, High-Duty Alloys, Ltd., Slough; (c) “Metals Handbook,” A.S.M.; (d) Zeerleder, “Metallurgy of Aluminium and its Alloys.”.

Patent application No. 31, 152/45.

For a complete review of modern bearing theory and references, see Bowden and collaborators' publications, the Department of Industrial and Scientific Research, Australia, 1941–44.

Hiduminium Data Sheets.

“Testing Lubricants and Bearing Materials,” by Brix V. H. (Aircraft Engineering, Vol. XVI, p. 361).

British Patent Nos. 483,993, 557,070, and 581,527.