The significance of self-annealing in two-phase alloys processed by high-pressure torsion

Authors: Zhang, N.X., Kawasaki, M., Huang, Y. and Langdon, T.G.

Journal: IOP Conference Series: Materials Science and Engineering

Volume: 63

Issue: 1

eISSN: 1757-899X

ISSN: 1757-8981

DOI: 10.1088/1757-899X/63/1/012126

Abstract:

The Zn-22% Al eutectoid alloy and the Pb-62% Sn eutectic alloy were processed by high-pressure torsion (HPT) over a range of experimental conditions. Both alloys exhibit similar characteristics with significant grain refinement after processing by HPT but with a reduction in the hardness values by comparison with the initial unprocessed conditions. After storage at room temperature for a period of time, it is shown that the microhardness of both alloys gradually recovers to close to the initial unprocessed values. Electron backscatter diffraction (EBSD) measurements on the Pb-Sn alloy suggest that the self-recovery behaviour is correlated with the fraction of high-angle grain boundaries (HAGBs) after HPT processing. Thus, high fractions of HAGBs occur immediately after processing and this favours grain boundary migration and sliding which is important in the self-annealing and recovery process. Conversely, the relatively lower fractions of HAGBs occurring after annealing at room temperature are not so conducive to easy migration and sliding. © Published under licence by IOP Publishing Ltd.

Source: Scopus

The significance of self-annealing in two-phase alloys processed by high-pressure torsion

Authors: Zhang, N.X., Kawasaki, M., Huang, Y. and Langdon, T.G.

Journal: 6TH INTERNATIONAL CONFERENCE ON NANOMATERIALS BY SEVERE PLASTIC DEFORMATION (NANOSPD6)

Volume: 63

ISSN: 1757-8981

DOI: 10.1088/1757-899X/63/1/012126

Source: Web of Science (Lite)

The significance of self-annealing in two-phase alloys processed by high-pressure torsion

Authors: Zhang, N.X., Kawasaki, M., Huang, Y. and Langdon, T.G.

Conference: NanoSPD6: The 6th International Conference on Nanomaterials by Severe Plastic Deformation

Dates: 30 June-4 July 2014

Journal: IOP Conference Series: Materials Science and Engineering

Volume: 63

Issue: 1

Pages: 01226(1)-012126(9)

eISSN: 1757-899X

ISSN: 1757-8981

DOI: 10.1088/1757-899X/63/1/012126

Abstract:

The Zn-22% Al eutectoid alloy and the Pb-62% Sn eutectic alloy were processed by high-pressure torsion (HPT) over a range of experimental conditions. Both alloys exhibit similar characteristics with significant grain refinement after processing by HPT but with a reduction in the hardness values by comparison with the initial unprocessed conditions. After storage at room temperature for a period of time, it is shown that the microhardness of both alloys gradually recovers to close to the initial unprocessed values. Electron backscatter diffraction (EBSD) measurements on the Pb-Sn alloy suggest that the self-recovery behaviour is correlated with the fraction of high-angle grain boundaries (HAGBs) after HPT processing. Thus, high fractions of HAGBs occur immediately after processing and this favours grain boundary migration and sliding which is important in the self-annealing and recovery process. Conversely, the relatively lower fractions of HAGBs occurring after annealing at room temperature are not so conducive to easy migration and sliding. © Published under licence by IOP Publishing Ltd.

Source: Manual

Preferred by: Yi Huang