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The Marine Engineer and Naval Architect, Vol. 46: May, 1923 (Classic Reprint)

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Excerpt from The Marine Engineer and Naval Architect, Vol. 46: May, 1923

The results are given in Table III and show considerable variation in proportionality limit, elongation, and reduction of area. The heat treatment of nickel steel forgings is liable to produce in them st... Læs mere

Excerpt from The Marine Engineer and Naval Architect, Vol. 46: May, 1923

The results are given in Table III and show considerable variation i... Læs mere

Produktdetaljer:

Sprog:
Engelsk
ISBN-13:
9781333884406
Sideantal:
48
Udgivet:
01-10-2016
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Excerpt from The Marine Engineer and Naval Architect, Vol. 46: May, 1923

The results are given in Table III and show considerable variation in proportionality limit, elongation, and reduction of area. The heat treatment of nickel steel forgings is liable to produce in them strains of extreme severity. The exact nature of the strains it is not easy to determine. Were it only a question of simple expansion or contraction with vary ing temperature, the sudden cooling of the outer surface while the core is still bot will put that surface for the moment int-o a state of tension which the subsequent contraction of the core would reverse, and ultimately there would be compression strain on the surface and tensile strain in the interior. The action, however, is complicated by the changes of volume at recalcsccnce points, first beneath the cooled surface and then gradually farther in, and varying strains and stresses are set up in all parts of the pinion. Heavy stresses may thus come upon some portion of the steel when it is at such a temperature as to be in a brittle condition and result in a crack or in per manent injury to the steel.

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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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