Annealing twin development during recrystallization and grain growth in pure nickel

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:597

Article

Jin, Y.¹  Lin, B.²  Bernacki, M.¹  Rohrer, G. S.²  Rollett, A. D.²  Bozzolo, N.¹ 

[1] CNRS UMR 7635, MINES ParisTech, CEMEF Ctr Mise Forme Mat, F-06904 Sophia Antipolis, France

[2] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

关键词: Annealing twin;    Recrystallization;    Grain growth;    In situ annealing;    EBSD;   

DOI  :  10.1016/j.msea.2014.01.018

来源: Elsevier

【 摘 要 】

A 99.995% pure Ni sample, compressed to 25%, was annealed in a SEM chamber and changes in the density of annealing twins were monitored in situ during recrystallization and grain growth. In addition to average microstructural measurements, the evolution of individual grains was also observed. Both the average annealing twin density in the recrystallized domain and the annealing twin density per grain increased during recrystallization. The rate of increase in twin density correlates with the velocity of the recrystallization front. During grain growth, however, the average annealing twin density decreased. The in situ EBSD observations showed both the formation of new twins and the extension of existing twins during annealing. The observations reported here suggest that the existing models for annealing twin formation are incomplete. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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