Effects of Mn and Cr additions on the recrystallization behavior of Al-Mg-Si-Cu alloys

Gong Wang Zhang, Hiromi Nagaumi, Yi Han, Yi Xu, Chad M. Parish, Tong Guang Zhai

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

11 Scopus citations


Upsetting tests on two newly developed Mn and Cr-containing Al-Mg-Si-Cu alloys with various Mn contents were carried out at a speed of 15 mm/s under upsetting temperature of 450 °C after casting and subsequent homogenization heat treatment using a 300-Tone hydraulic press. STEM experiments revealed that Mn and Cr-containing α-Al(MnCrFe)Si dispersoids formed during homogenization showed a strong pinning effect on dislocations and grain boundaries, which could effectively inhibit recovery and recrystallization during hot deformation in the two alloys. Recrystallization fractions after solution heat treatment following hot deformation were measured by EBSD technique. It was found that the recrystallization fractions of the two alloys were less than 30%, giving rise to lower recrystallization fraction in the alloy with higher amount of Mn, which had higher number density of dispersoids. This implied that the finely distributed α-dispersoids were rather stable against coarsening and they stabilized the microstructure by inhibiting dislocation recovery and recrystallization during elevated temperature exposure. Increasing the content of Mn could increase the number density as well as the aspect ratio of the dispersoids, and more significantly, the effect of retardation on recrystallization were further enhanced.

Original languageEnglish
Title of host publicationThe 15th International Conference on Aluminium Alloys, ICAA
EditorsQing Liu, Robert Sanders, Zhihong Jia, Lingfei Cao, Jian-Feng Nie, Jian-Feng Nie
Number of pages8
StatePublished - 2017
Event15th International Conference on Aluminium Alloys, ICAA 2016 - Chongqing, China
Duration: Jun 12 2016Jun 16 2016

Publication series

NameMaterials Science Forum
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752


Conference15th International Conference on Aluminium Alloys, ICAA 2016


  • Al-Mg-Si-Cu aluminum alloy
  • Homogenization
  • Mn content
  • Mn-containing dispersoids
  • Recrystallization

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'Effects of Mn and Cr additions on the recrystallization behavior of Al-Mg-Si-Cu alloys'. Together they form a unique fingerprint.

Cite this