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Serrated Yielding in Cu-1%Cd Alloy

Lookup NU author(s): Dr Settivari Nagarjuna, Emeritus Professor Terry Evans

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Abstract

The influence of grain size and temperature on the serration patterns of the Portevin-Le Chatelier (PLC) effect and on the yield and flow stresses in a Cu-1 wt-%Cd alloy was investigated in the temperature range 150 to 360 � C. Two kinds of serration patterns were observed in this alloy. Type I occurred at lower temperatures and its yield points are moderately spaced. Type II consists of regular jerky flow observed athigher temperatures. The Hall-Petch equation is obeyed over the temperature range in which jerky flow occurs. The Hall-Petch parameter k (ε) is observed to show a local maximum in the temperature range where serrated flow is first observed. The PLC effect is associated with the solute- dislocation interactions, implying that k (ε) contains a component associated with grain size dependent dislocation storage.


Publication metadata

Author(s): Evans JT; Nagarjuna S; Anozie FN

Publication type: Article

Journal: Materials Science and Technology

Year: 2003

Volume: 19

Issue: 12

Pages: 1661-1664

ISSN (print): 0267-0836

ISSN (electronic): 1743-2847

Publisher: Maney Publishing

URL: http://dx.doi.org/10.1179/026708303225009481

DOI: 10.1179/026708303225009481


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