Serrated flow in quenched duralumin alloy

Srinivasan, V (1973) Serrated flow in quenched duralumin alloy. Philosophical Magazine, 27 (8th Se). pp. 823-832.

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Abstract

Study of the dynamic strain aging behavior of a quenched duralumin alloy. It is found that dynamic strain aging occurs in quenched duralumin alloy between 230 and 295 K and is associated with a serrated stress-strain curve and a strengthening process. There is always a finite time interval between the yield and the appearance of first serration, and this delay time is dependent on the applied strain rate and test temperature. These observations are rationalized by a model based on solute-dislocation interaction, and it is found that the moving dislocation density in the alloy decreases at constant strain and temperature with the applied strain rate during strain aging. Activation energy evaluated from these observations suggests that copper-magnesium pair is likely to be responsible for dynamic strain aging of the alloy.

Item Type:	Journal Article
Uncontrolled Keywords:	Aging (Metallurgy);aluminum alloys;Quenching (Cooling);Strain hardening;Activation energy;Copper alloys;Crystal dislocations;Magnesium alloys;Strain rate;Stress-strain diagrams
Subjects:	CHEMISTRY AND MATERIALS > Metals and Metallic Materials
Division/Department:	Materials Science Division
Depositing User:	Ms. Alphones Mary
Date Deposited:	02 May 2006
Last Modified:	24 May 2010 09:40
URI:	http://nal-ir.nal.res.in/id/eprint/1214

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