Age softening behavior of strip cast and direct chill cast Al-Mg alloys

Xiang Ming Cheng, Tongguang Zhai, James G. Morris

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The Aging Softening behavior of Al-Mg alloys was studied in 90% cold rolled Strip Cast (SC) AA5754 and AA5182 alloys. It was found that Al-Mg alloys show significant age softening after long time exposure at room temperature. In addition to age softening, the intensity of the Portevin-Le Chatelier (PLC) effect also increases with increasing aging time at room temperature. The tensile anisotropy decreases after long time room temperature aging. Crystallographic textures also reveal an aging effect when examined at room temperature for long times. The deformation texture components decrease in intensity while the recrystallization texture components increase in intensity with increasing time at room temperature aging. The intensity of the aging effect increases with increasing Mg content, increase in the degree of cold reduction, and increase in aging temperature. While no precipitation was observed in samples aged at room temperature for 1.5 years, precipitation was observed using both optical microscopy and TEM in samples aged at 204°C for 3 hours. These results support the hypothesis that the aging behavior results from the decomposition and precipitation of the Mg-rich clusters around dislocations.

Original languageEnglish
Title of host publicationAdvances in the Metallurgy of Aluminum Alloys
EditorsM. Tiyakioglu, M. Tiyakioglu
Number of pages6
StatePublished - 2001
EventProceedings from Materials Solutions Conference 2001 - Indianapolis, IN, United States
Duration: Nov 5 2001Nov 8 2001

Publication series

NameAdvances in the Metallurgy of Aluminum Alloys


ConferenceProceedings from Materials Solutions Conference 2001
Country/TerritoryUnited States
CityIndianapolis, IN


  • Age softening
  • Al-Mg alloys
  • Portevin-Le Chatelier
  • Strip cast
  • Texture

ASJC Scopus subject areas

  • General Engineering


Dive into the research topics of 'Age softening behavior of strip cast and direct chill cast Al-Mg alloys'. Together they form a unique fingerprint.

Cite this