Effects of boron on the fracture behavior and ductility of cast Ti-6Al-4V alloys

SCRIPTA MATERIALIA

卷:100

Article

Luan, J. H.¹  Jiao, Z. B.¹  Heatherly, L.²  George, E. P.²  Chen, G.³  Liu, C. T.¹ 

[1] City Univ Hong Kong, Coll Sci & Engn, Dept Mech & Biomed Engn, Ctr Adv Struct Mat, Hong Kong, Hong Kong, Peoples R China

[2] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[3] Nanjing Univ Sci & Technol, Minist Educ, Engn Res Ctr Mat Behav & Design, Nanjing 210094, Jiangsu, Peoples R China

关键词: Ti-6Al-4V alloy;    Grain boundary segregation;    Auger electron spectroscopy;    Ductility;    Fracture;   

DOI  :  10.1016/j.scriptamat.2014.12.022

来源: Elsevier

【 摘 要 】

Minor amounts of boron additions have been found to greatly enhance the ductility of cast Ti-6Al-4V alloys, which was considered to be due to the grain-size refinement. In this paper, we report our interesting finding that the beneficial effect of boron on the ductility of the cast titanium alloys is due not only to the grain-size refinement but the enhancement of the prior-beta grain-boundary cohesion by boron segregation at the grain boundaries, as evidenced by Auger electron microscopy. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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