@inproceedings{b00e48fdeb3049a49733dedcf65e3df5,
title = "Microstructure and mechanical properties of an advanced niobium based ultrahigh temperature alloy",
abstract = "The microstructure and mechanical properties including room temperature fracture toughness Kq, tensile strength σb and elongation δ at 1250°C of the Nb based alloy directionally solidified in an electron beam floating zone melting (EBFZM) furnace have been evaluated. The microstructure is primarily composed of Nb solid solution (Nbss), α -(Nb)3Si3 and (Nb)3Si phases. After directional solidification with the moving rate of electron beam gun R being respectively 2.4, 4.8 and 7.2 mm/min, the primary Nbss dendrites, Nbss + (Nb) 5Si3/(Nb)3Si eutectic colonies (lamellar or rod-like) and divorced Nb suicide plates align along the longitudinal axes of the specimens. When R - 2.4 mm/min, the best directional microstructure is obtained. Directional solidification has significantly improved the σb at 1250°C and Kq. The maximum σb occurs for the specimens with R = 2.4 mm/min and is about 85.0 MPa, meanwhile, the Kq is about 19.4 MPam1/2.",
keywords = "Directional solidification, Mechanical properties, Microstructure, Niobium based alloy, Niobium suicides, Ultrahigh temperature alloy",
author = "Guo, {X. P.} and Gao, {L. M.} and P. Guan and K. Kusabiraki and Fu, {H. Z.}",
year = "2007",
doi = "10.4028/0-87849-428-6.3690",
language = "英语",
isbn = "0878494286",
series = "Materials Science Forum",
publisher = "Trans Tech Publications Ltd",
number = "PART 4",
pages = "3690--3695",
booktitle = "Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006",
edition = "PART 4",
note = "5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006 ; Conference date: 04-07-2006 Through 08-07-2006",
}
