2.6 Corrosion in stressed products – stress corrosion cracking (SCC)

If a stress exists in a product exposed to a corrosive environment, the rate of corrosion can then increase and be extremely localised, such as at the tip of a growing crack. Furthermore, some specific chemicals are so aggressive that corrosion will occur at relatively low stress levels, such as those created during manufacture, for example. The residual stress in a component can then be enough to trigger crack growth and failure.


Author(s): The Open University

License information
Related content

Except for third party materials and/or otherwise stated (see terms and conditions) the content in OpenLearn is released for use under the terms of the Creative Commons Attribution-NonCommercial-Share

4.3 Voice and accompaniment

One thing that is clear from the Lieder we have already considered is that Schubert's writing for the piano is a crucial element of his skill as a songwriter. Sometimes, and throughout his career, he wrote very simple accompaniments, as in ‘Heidenröslein’ – the approach favoured by Goethe and many other writers of the time, who considered that the German Lied should not overload the poem with too much elaboration. Schubert's later version of the ‘Harper's Song’ is more complex, wit
Author(s): The Open University

License information
Related content

Except for third party materials and/or otherwise stated (see terms and conditions) the content in OpenLearn is released for use under the terms of the Creative Commons Attribution-NonCommercial-Share

2.2.1 The recordings

Click 'play' to listen to the interview with Sorley MacLean (Part 1, 7 minutes).

Download this audio clip.