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111. Shrouding on impulse turbine blading is held in place by __________.
Impulse turbine blade shrouding is secured by peening the tenons. Tenons, or small projections on the blade tips, pass through the shroud ring and are mechanically expanded to lock the shroud in place. This method avoids welding or the use of keys or dovetails, which are used for other turbine components.
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