Mechanisms of continuous recrystallization in an Al-Zr-Si alloy

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Acta Metallurgica; (United States)

DOI:https://doi.org/10.1016/0956-7151(91)90325-U· OSTI ID:7030812

Gudmundsson, H; Brooks, D; Wert, J A ^[1]

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1. Dept. of Materials Science, Univ. of Virginia, Charlottesville, VA (US)

This paper reports that microstructural evolution in an Al-Zr-Si alloy has been investigated with the goal of elucidating the mechanisms responsible for formation of high-angle grain boundaries by continuous, recovery-type processes during concurrent straining and annealing. The primary method of investigation was TEM characterization of the microstructure and microtexture after cold rolling, after annealing, and after concurrent straining and annealing. The cold-rolled microstructure consists of layers parallel to the rolling plane; only low-angle boundaries are present within each layer while adjacent layers are separated by high-angle boundaries. During annealing, the subgrain size increased but the subgrain boundary misorientations are not significantly changed and the high-angle boundaries are relatively immobile. In contrast, concurrent straining and annealing of the cold-rolled material causes a gradual increase in the misorientation of some of the original low-angle boundaries, implying subgrain rotation. Ultimately, high-angle boundaries evolve by subgrain rotation from the subgrain boundaries originally present within each layer. The observations are interpreted in terms of several mechanisms previously proposed for microstructural evolution during concurrent straining and annealing.

• OSTI ID: 7030812
• Journal Information: Acta Metallurgica; (United States), Vol. 39:1; ISSN 0001-6160
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
MICROSTRUCTURE
SILICON ALLOYS
ZIRCONIUM ALLOYS
ANNEALING
COLD WORKING
GRAIN BOUNDARIES
RECRYSTALLIZATION
ROLLING
STRAINS
TEXTURE
TRANSMISSION ELECTRON MICROSCOPY
ALLOYS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
FABRICATION
HEAT TREATMENTS
MATERIALS WORKING
MICROSCOPY
360102* - Metals & Alloys- Structure & Phase Studies