WORK HARDENING IN LOW-CARBON STEEL DEFORMED AT ROOM TEMPERATURE

被引:19
作者
EVANS, JT
RAWLINGS, R
机构
[1] Department of Metallurgy, University College of South Wales and Monmouthshire, Cardiff
来源
MATERIALS SCIENCE AND ENGINEERING | 1969年 / 4卷 / 05期
关键词
D O I
10.1016/0025-5416(69)90006-8
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The yield point elongation in low-carbon steel specimens was suppressed either by decarburising or by quenching from 700°C. After these treatments specimens with two different grain diameters (0.02 and 0.20 mm) were deformed 3, 6 and 9% in tension and thin foils were prepared and examined in the electron microscope. It was found that the rate of work hardening was determined by the rate of storage of dislocations, which in turn depended upon the grain size and the presence of carbon in solution. It is concluded that the rate of dislocation storage in fine-grain specimens is markedly increased by the presence of interstitial carbon because immobilisation of dislocations by short-range ordering of carbon atoms in their stress fields decreases the rate at which dislocations are annihilated. © 1969.
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页码:297 / &
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