Grain Growth and Mechanical Properties of Nanograined Bulk Fe-25Ni Alloy

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The grain growth and mechanical properties of nanograined bulk Fe-25at%Ni alloy prepared by an inert gas condensation and in-situ warm consolidation technique were investigated. About 43% high temperature face-centered-cubic (FCC) phase and 57% low temperature body-centered-cubic (BCC) phase were observed in the sample at room temperature, which was significantly different from that of the corresponding conventional coarse-grained alloy. The in-situ X-ray diffraction results show that the start and the finish temperature of BCC to FCC phase transformation are 450°C and 600°C, respectively. The isothermal grain growth exponent n from t k D D n n ¢ = − 1 0 1 for nanograined single FCC phase Fe-25at%Ni alloy is 0.38 at 750 °C . The mechanical properties changing with the grain size were studied by means of microindentation test.

Info:

Periodical:

Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie

Pages:

3459-3462

DOI:

10.4028/www.scientific.net/MSF.475-479.3459

Citation:

H. B. Wang et al., "Grain Growth and Mechanical Properties of Nanograined Bulk Fe-25Ni Alloy", Materials Science Forum, Vols. 475-479, pp. 3459-3462, 2005

Online since:

January 2005

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$35.00

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