scholarly journals Investigations of continuous casting extrusion on the microstructures and properties of Zn-Al and Zn-Al-Ti alloys

2016 ◽  
Author(s):  
Y L Li ◽  
L Z He
Keyword(s):  
Continuous Casting ◽  
Ti Alloys

Fabrication of Lotus-Type Porous Al-Ti Alloys Using the Continuous Casting Technique

2010 ◽  
Vol 658 ◽  
pp. 207-210
Author(s):  
Tae Bum Kim ◽  
Shinsuke Suzuki ◽  
Hideo Nakajima
Keyword(s):  
Continuous Casting ◽  
Solidification Process ◽  
Hydrogen Atmosphere ◽  
The Other ◽  
Transfer Velocity ◽  
Casting Technique ◽  
Matrix Microstructure ◽  
Ti Alloys ◽  
Peritectic Solidification ◽  
Transfer Direction

Porous Al-5mass%Ti alloys were fabricated using a continuous casting technique in a hydrogen atmosphere, and the effects of transfer velocity (V) and the peritectic solidification process on the pore morphology and matrix microstructure were examined. In the case of V = 0.5 mm/min, columnar microstructure and directional pores grow along the transfer direction. The Al3Ti phases are formed in localized regions of matrix part, and however, they do not suppress the growth of directional pores in the other regions. In the case of 5.0 mm/min, because needle-like Al3Ti phases grow along the transfer direction, directional pores can grow between them. On the other hand, in the case of 10.0 mm/min, spherical pores surrounded by equiaxed peritectic microstructure and homogeneously distributed Al3Ti phases are formed, because the primary α -Al and Al3Ti phases probably prevent the growth of directional pores.

Direct Observation of the Diffusionless β → β + ω Transformation in Titanium Alloys

1971 ◽  
Vol 29 ◽  
pp. 122-123
Author(s):  
N. E. Paton ◽  
D. de Fontaine ◽  
J. C. Williams
Keyword(s):  
Electron Microscope ◽  
Titanium Alloys ◽  
Direct Observation ◽  
Dark Field ◽  
X Ray Diffraction ◽  
Resistivity Measurements ◽  
Selected Area Electron Diffraction ◽  
Ti Alloys ◽  
Thin Foils ◽  
Field Device

The electron microscope has been used to study the diffusionless β → β + ω transformation occurring in certain titanium alloys at low temperatures. Evidence for such a transformation was obtained by Cometto et al by means of x-ray diffraction and resistivity measurements on a Ti-Nb alloy. The present work shows that this type of transformation can occur in several Ti alloys of suitable composition, and some of the details of the transformation are elucidated by means of direct observation in the electron microscope.Thin foils were examined in a Philips EM-300 electron microscope equipped with a uniaxial tilt, liquid nitrogen cooled, cold stage and a high resolution dark field device. Selected area electron diffraction was used to identify the phases present and the ω-phase was imaged in dark field by using a (101)ω reflection. Alloys were water quenched from 950°C, thinned, and mounted between copper grids to minimize temperature gradients in the foil.

AN ATOM-PROBE STUDY OF Fe-Ti ALLOYS

1984 ◽  
Vol 45 (C9) ◽  
pp. C9-417-C9-422
Author(s):  
A. Jimbo ◽  
T. Hashizume ◽  
T. Sakurai ◽  
K. Al-Saleh ◽  
H. W. Pickering
Keyword(s):  
Atom Probe ◽  
Ti Alloys

MAGNETIC PROPERTIES OF AMORPHOUS Fe-Ti ALLOYS PRODUCED BY FACING TARGET TYPE SPUTTERING

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-1275-C8-1276
Author(s):  
K. Sumiyama ◽  
H. Yasuda ◽  
Y. Nakamura
Keyword(s):  
Magnetic Properties ◽  
Target Type ◽  
Ti Alloys

Ultra low aluminium DWI grade development of an atypical continuous casting powder with high viscosity

2009 ◽  
Vol 106 (6) ◽  
pp. 242-247
Author(s):  
C. Damerval ◽  
H. Tavernier ◽  
L. Avedian ◽  
P. Disant ◽  
P. Delfosse ◽  
...  
Keyword(s):  
Continuous Casting ◽  
High Viscosity

Influence of technology parameters of free-cutting steel continuous casting on the billet internal structure

2020 ◽  
Vol 76 (2) ◽  
pp. 139-142
Author(s):  
A. T. Kunakbaeva ◽  
A. M. Stolyarov ◽  
M. V. Potapova
Keyword(s):  
Regression Analysis ◽  
Continuous Casting ◽  
Internal Structure ◽  
Sulfur Content ◽  
Manganese Content ◽  
High Quality ◽  
Correlation And Regression Analysis ◽  
Cutting Steel ◽  
Continuously Cast

Free-cutting steel gains specific working properties thanks to the high content of sulfur and phosphorus. These elements, especially sulfur, have a rather high tendency to segregation. Therefore, segregation defects in free-cutting steel continuously cast billets can be significantly developed. The aim of the work was to study the influence of the chemical composition of freecutting steel and casting technological parameters on the quality of the macrostructure of continuously cast billets. A metallographic assessment of the internal structure of cast metal made of free-cutting steel and data processing by application of correlation and regression analysis were the research methods. The array of production data of 43 heats of free-cutting steel of grade A12 was studied. Steel casting on a five-strand radial type continuous casting machine was carried out by various methods of metal pouring from tundish into the molds. Metal of 19 heats was poured with an open stream, and 24 heats – by a closed stream through submerged nozzles with a vertical hole. High-quality billets had a cross-sectional size of 150×150 mm. The macrostructure of high-quality square billets made of free-cutting steel of A12 grade is characterized by the presence of central porosity, axial segregation and peripheral point contamination, the degree of development of which was in the range from 1.5 to 2.0 points, segregation cracks and strips – about 1.0 points. In the course of casting with an open stream, almost all of these defects are more developed comparing with the casting by a closed stream. As a result of correlation and regression analysis, linear dependences of the development degree of segregation cracks and strips both axial and angular on the sulfur content in steel and on the ratio of manganese content to sulfur content were established. The degree of these defects development increases with growing of sulfur content in steel of A12 grade. These defects had especially strong development when sulfur content in steel was of more than 0.10%. To improve the quality of cast metal, it is necessary to have the ratio of the manganese content to the sulfur content in the metal more than eight.

Assessment of the Peritectic Behavior in the Continuous Casting Mold

2020 ◽  
Author(s):  
C. Ortner ◽  
L. Martins Demuner ◽  
M. Schuster ◽  
O. Lang ◽  
F. Ramstorfer
Keyword(s):  
Continuous Casting ◽  
Continuous Casting Mold ◽  
Casting Mold
Sign in / Sign up

Export Citation Format

Share Document