Preparation of Macrocrystalline Tungsten-Based Alloys by Electron-Beam Floating Zone Melting

2021 ◽  
Vol 57 (12) ◽  
pp. 1307-1316
Author(s):  
N. P. Bobyr ◽  
A. V. Golubeva ◽  
N. N. Presnyakova ◽  
V. A. Stepanov ◽  
D. I. Kochetov ◽  
...  
2017 ◽  
Vol 250 ◽  
pp. 239-246 ◽  
Author(s):  
Jieren Yang ◽  
Hu Wang ◽  
Binqiang Wang ◽  
Rui Hu ◽  
Yi Liu ◽  
...  

1992 ◽  
Vol 56 (8) ◽  
pp. 907-914
Author(s):  
Kouji Mimura ◽  
Michihiro Kasuga ◽  
Michio Nanjo

1995 ◽  
Vol 156 (4) ◽  
pp. 480-486 ◽  
Author(s):  
V. Alonzo ◽  
F. Berthier ◽  
V.G. Glebovsky ◽  
L. Priester ◽  
V.N. Semenov

2007 ◽  
Vol 539-543 ◽  
pp. 3690-3695 ◽  
Author(s):  
X.P. Guo ◽  
L.M. Gao ◽  
Ping Guan ◽  
K. Kusabiraki ◽  
Heng Zhi Fu

The microstructure and mechanical properties including room temperature fracture toughness Kq, tensile strengthσb and elongationδ 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)5Si3 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 silicide 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 theσb at 1250°C and Kq. The maximumσb 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.


Sign in / Sign up

Export Citation Format

Share Document