Microstructures and Tensile Properties of Fe-40Al Intermetallic with High Boron Content

Abstract:

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The effects of B addition up to 0.4 wt% (i.e., 1.61 at%) to Fe-40Al alloy on microstructures and tensile properties were investigated. The vacancy-annealed specimens following casting and extrusion were examined by optical and scanning electron microscopy and thermal neutron-induced microradiography. The addition of a large amount of B resulted in grain refinement and changed the fracture mode from intergranular to transgranular to increase the tensile elongation. Especially, the alloy containing 0.3wt% B exhibited the elongation of 16.4% under the strain rate of 1x100s-1 at room temperature. The increase in elongation with increasing strain rate was discussed in terms of suppression of hydrogen embrittlement.

Info:

Periodical:

Materials Science Forum (Volumes 510-511)

Edited by:

Hyung Sun Kim, Yu Bao Li and Soo Wohn Lee

Pages:

350-353

DOI:

10.4028/www.scientific.net/MSF.510-511.350

Citation:

J. H. Lee et al., "Microstructures and Tensile Properties of Fe-40Al Intermetallic with High Boron Content", Materials Science Forum, Vols. 510-511, pp. 350-353, 2006

Online since:

March 2006

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Price:

$35.00

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