THE EFFECT OF Zr ON AGING KINETICS AND PROPERTIES OF AS-CAST AA6082 ALLOY

Kahrıman F., Zeren M.

INTERNATIONAL JOURNAL OF METALCASTING, vol.11, no.2, pp.216-222, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 2
  • Publication Date: 2017
  • Doi Number: 10.1007/s40962-016-0047-1
  • Journal Name: INTERNATIONAL JOURNAL OF METALCASTING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.216-222
  • Keywords: AA6082 alloy, zirconium, casting, kinetics, precipitation, MG-SI ALLOY, MECHANICAL-PROPERTIES, PRECIPITATION, MICROSTRUCTURE, TRANSFORMATION, SCANDIUM, PHASES, TEM, SC
  • Kocaeli University Affiliated: Yes

Abstract

In aluminum alloys, zirconium is usually used as a recrystallization inhibitor and microstructure refiner. Its minor addition to alloy composition could produce a significant precipitation hardening response and enhance the both physical and chemical properties. In this work, the effect of zirconium on the aging kinetics of a commercial as-cast AA6082 alloy was investigated using Avrami equations obtained from the variation in electrical conductivity values as a function of aging time at 180 degrees C (356 degrees F). The results showed that the aging kinetics slowed down and the matrix hardness of aged alloy enhanced due to Zr addition.