Effect of modification and cooling rate on the macrostructure of IN-713C alloy
Journal Title: Archiwum Odlewnictwa - Year 2009, Vol 9, Issue 3
Abstract
The results of investigations of the effect of modification and cooling rate on the macrostructure of castings made from IN-713C nickel superalloy were described. As a modifier, cobalt aluminate CoAl2O4 in composition with aluminium powder and colloidal silica was used. Changes in the cooling rate were obtained by the use of a stepped test piece with the steps of 6, 11, 17 and 23 mm thickness. As a criterion for the evaluation of casting macrostructure, the stereological parameters, like grain count, relative surface area, shape factor, and indeces of the grain size and shape homogeneity, were applied. The modification treatment was observed to change the grain type from columnar to equiaxial. The stereological parameters of the equiaxial grains depended to a great extent on the cooling rate of the individual elements of a cast stepped test piece.
Authors and Affiliations
F. Binczyk, J. Śleziona, A. Kościelna
Keywords
Related Articles
- EP ID EP71984
- DOI -
- Views 115
- Downloads 0
Weld microstructure in cast AlSi9/SiC(p) metal matrix composites
Welded joint in cast AlSi9/SiC/20(p) metal matrix composite by manual TIG arc welding using AlMg5 filler metal has been described in his paper. Cooling curves have been stated, and the influence in distribution of reinfo...
The structure of Ni–enriched Al–Ni molten alloy before solidification
The structure of Ni–based molten alloy, containing 88,02w.%Ni and dopped both with Zr (0,46w.%) and B (0,02w.%) has been studied by means of X–ray diffraction method at temperature 1500 K. Structure factor and pair corre...
Analysis of power demand signal in laboratory rotary mixer
The paper summarises the power measurement data for the main assemblies in a prototype turbine mixers for laboratory applications. Of particular interest are power demand signals in the paddle stirrer and the rotor. Test...
Total productive maintenance on example of automated foundry lines
Within framework of the presented study one has performed analysis of stoppages in automatic foundry lines operation, and basing on assumptions from complex maintenance system has undertaken himself to develop a service...
White and gray solidification of the Fe-C eutectic
The mechanism of structure transition from stable to metastable eutectic is the object of the publication. The influence of micro-segregation elements on forming different phase, growth undercooling and growth rates was...