Open AccessExperiments on the distortion of single-crystal test-pieces of aluminium
Publication year - 1925
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1925.0013
Subject(s) - distortion (music) , crystallography , aluminium , crystal (programming language) , materials science , single crystal , composite material , chemistry , computer science , amplifier , optoelectronics , cmos , programming language
When aluminium test-pieces are broken in tension, and subsequently heated to a sufficiently high temperature, they re-crystallise and break up into a number of smaller crystals, whose size depends on the amount of distortion. For example, near the fracture the crystals are smallest, and they increase in size towards the shoulders of the test-piece. In order to investigate this matter further, a number of single crystal test-pieces were extended to varying amounts and heated. The following Table shows the results obtained:— Nos. 351-377 were subsequently heated at 600° C. for two hours, after which no change was observed. The orientations of the crystals probably differed, so that the results are not strictly comparable; but it is evident that the crystals can be deformed as much as 7 per cent, without being destroyed on heating. Those that did re-crystallise show exceptionally straight crystal boundaries, and are frequently twinned.