STUDY ON THE PEIREL–NABARRO STRESS OF IRON ALUMINIDES

L. X. Pang (), N. F. Han, H. Shi, J. Xu, X. H. Hao and X. D. Tang
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L. X. Pang: School of Materials Science and Engineering, Shandong Jiaotong University, Jinan 250357, P. R. China
N. F. Han: School of Materials Science and Engineering, Shandong Jiaotong University, Jinan 250357, P. R. China
H. Shi: School of Materials Science and Engineering, Shandong Jiaotong University, Jinan 250357, P. R. China
J. Xu: School of Materials Science and Engineering, Shandong Jiaotong University, Jinan 250357, P. R. China
X. H. Hao: School of Materials Science and Engineering, Shandong Jiaotong University, Jinan 250357, P. R. China
X. D. Tang: School of Materials Science and Engineering, Shandong Jiaotong University, Jinan 250357, P. R. China

Surface Review and Letters (SRL), 2012, vol. 19, issue 06, 1-5

Abstract: The modified Peirel–Nabarro model of dislocations is not valid for the superdislocation bounded by the antiphase domain boundaries in long-range ordered intermetallic. In this work, a new Peirel–Nabarro Stress model is developed to take into account the critical resolved shear stress of antiphase domain boundary (APDB). Based on it, the Peirel–Nabarro Stress of DO3structure and B2 structure in iron aluminides are calculated. Comparing the Peirel–Nabarro Stress of dislocations and the crystal theoretical yield strength, the results demonstrate B2-type crystal has good plasticity. It coincides with the experimental results well.

Keywords: Iron aluminides; superdislocation; Peirel–Nabarro Stress; antiphase boundary energy; mechanical property (search for similar items in EconPapers)
Date: 2012
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DOI: 10.1142/S0218625X12500576

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