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Microstructures and Tensile Properties of Cold-rolled Thin Foils of Binary Ni-Al γ/γ' Alloys

Published online by Cambridge University Press:  11 February 2011

Dingqiang Li
Affiliation:
National Institute for Materials Science, Tsukuba, Ibaraki 305–0047, Japan Shanghai Jiao Tong University, Shanghai 200030, P R China
Masahiko Demura
Affiliation:
National Institute for Materials Science, Tsukuba, Ibaraki 305–0047, Japan
Kyosuke Kishida
Affiliation:
National Institute for Materials Science, Tsukuba, Ibaraki 305–0047, Japan
Yozo Suga
Affiliation:
Nippon Cross Rolling Corporation, Mobara, Chiba 297–0026, Japan
Toshiyuki Hirano
Affiliation:
National Institute for Materials Science, Tsukuba, Ibaraki 305–0047, Japan
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Abstract

Three single crystal plates of γ/γ' Ni-Al two-phase alloys with near cube, Goss and intermediate orientations between cube and Goss were cold-rolled to 300 μm-thick foils with 83% reduction. Tensile tests of the foils were performed at room temperature to study the effect of rolling microstructures and textures on the mechanical properties. The fracture strength of all the foils was very high, 1.4–1.7 GPa, having a small initial normal direction (ND) dependence and a small difference between rolling direction (RD) and transverse direction (TD). The foils fabricated from initial cube and intermediate orientations showed necking and a small fracture elongation when tensile-tested along RD, while the foil fabricated from initial Goss orientation did not show necking and fracture elongation. All the foils showed small fracture elongations due to shear band formation when tensile-tested along TD.

Type
Research Article
Copyright
Copyright © Materials Research Society 2003

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References

[1] Beardmore, P., Davies, R. G. and Johnston, T. L., Transactions of the Metallurgical Society of AIME 245, 1537(1969).Google Scholar
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Microstructures and Tensile Properties of Cold-rolled Thin Foils of Binary Ni-Al γ/γ' Alloys
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