On deformation-induced continuous recrystallization in a superplastic Al-Li-Cu-Mg-Zr alloy

Journal Article · Wed Jul 01 04:00:00 EDT 1992 · Acta Metallurgica et Materialia; (United States)

OSTI ID:7267304

Liu, Qing; Yang, Jinfeng ^[1]

---

1. Harbin Institute of Technology, (China)

A quantified description is given of the evolution of continuous recrystallization of a warm-rolled Al-Li-Cu-Mg-Zr alloy deformed at 515 C and at different strain rates. Deformation is found to induce a rapid subgrain growth, and the higher strain rate results in more rapid subgrain growth and a finer recrystallized grain size. This is attributed to deformation-induced subgrain boundary to migration. Boundary misorientations between adjacent grains increase rapidly during deformation. The higher strain rate results in a faster increase in misorientations which is proportional to the subgrain growth during static annealing. Deformation results in a rapid increase in misorientation with subgrain size. Dislocation gliding in grains is suggested to be the main deformation mechanism before the formation of the high angle grain boundaries. The absorption of dislocations into subgrain boundaries is considered to be the reason for the rapid increase in misorientations during deformation. 19 refs.

• OSTI ID: 7267304
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 40:7; ISSN 0956-7151; ISSN AMATE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
COPPER ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEFORMATION
DISLOCATIONS
ELECTRON MICROSCOPY
GRAIN BOUNDARIES
GRAIN GROWTH
GRAIN SIZE
LINE DEFECTS
LITHIUM ALLOYS
MAGNESIUM ALLOYS
MICROSCOPY
MICROSTRUCTURE
RECRYSTALLIZATION
SIZE
STRAIN RATE
ZIRCONIUM ALLOYS