Magnetically induced abnormal grain growth in pure nickel

ABSTRACT

The evolution of the microstructure of cold-rolled pure Ni during annealing at 300–800°C for 120 min with and without a high magnetic field of 10 T was investigated. When the direction of the field was either parallel or perpendicular to the sample rolling direction (RD), the average grain size of the cube grains decreased, and abnormally grown grains with random orientation were observed. The migration of different kinds of grain boundaries, including Cube–Cube (C–C) grain boundaries, Cube–Non-cube (C–N) grain boundaries, and Cube–Abnormal (C–A) grain boundaries, was also investigated. The driving force produced by the magnetic field accelerated the migration of C–A grain boundaries, which reasonably explained the formation of abnormal growth.

KEYWORDS:

• High magnetic field
• abnormal growth grains
• pure Ni
• grain boundary
• annealing
• cube grain
• drive force
• magnetic field direction

This review was submitted as part of the 2019 Materials Literature Review Prize of the Institute of Materials, Minerals and Mining run by the Editorial Board of MST. Sponsorship of the prize by TWI Ltd is gratefully acknowledged.

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Xintong Liu http://orcid.org/0000-0002-5369-2114

Ronghai Yu http://orcid.org/0000-0002-6084-7540