Journal ArticleDOI
Directional solidification of lead-copper immiscible alloys in a cyclic gravity environment
TLDR
In this paper, the suitability of the KC-135 environment for directional solidification of monotectic alloys is discussed, and differences within these regions are examined, and a suitability for the flight of the aircraft is discussed.Abstract:
Hypermonotectic copper-lead alloys were directionally solidified at unit gravity on earth and also in the cyclic gravitational environment attainable during flight of NASA's KC-135 aircraft. In both cases macrosegregation developed that consisted of an initial lead-rich phase above which an aligned composite structure of apparent monotectic composition grew. Differences within these regions are examined, and the suitability of the KC-135 environment for directional solidification of monotectic alloys is discussed.read more
Citations
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Frictional behavior of non-equilibrium Cu-Pb alloys
TL;DR: In this article, a continuous casting procedure was employed to produce homogeneous alloys of Cu-Pb with lead content greater than 40 wt. The friction and wear behavior of these alloys were studied by using a pin-on-disk test rig.
Journal ArticleDOI
Composite growth in hypermonotectic alloys
TL;DR: In this paper, the feasibility of uniformly aligned composites from alloys of hypermonotectic composition was investigated through the use of organic analogues and a directional solidification temperature gradient stage.
Journal ArticleDOI
The liquid phase separation of Bi-Ga hypermonotectic alloy under acoustic levitation condition
TL;DR: In this paper, a containerless treatment of Bi-58.5 at%Ga hypermonotectic alloy is successfully performed with acoustic levitation technique, where the second phase (Ga) distributes almost homogeneously in solidification sample.
Journal ArticleDOI
Low cycle fatigue and fracture behaviour of cast Cu–Pb alloys
TL;DR: In this article, the influence of alloy composition on cyclic stress response, cyclic strain resistance, and cyclic fracture behavior is reported, and the specific roles played by concurrent and mutually interactive influences of plastic strain amplitude, concomitant response stress, and intrinsic microstructural effects are discussed.
Journal ArticleDOI
The transition from columnar to equiaxed dendritic growth in proeutectic, low-volume fraction copper, Pb−Cu alloys
Shinwoo Kim,R. N. Grugel +1 more
TL;DR: In this paper, it was shown that increasing the growth velocity within this range results in a graded microstructural transition from fully columnar, albeit segregated, copper dendrites in a lead matrix to one consisting only of equiaxed grains.
References
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Book
Binary alloy phase diagrams
TL;DR: Binary Alloy Phase Diagrams, Second Edition, Plus Updates, on CD-ROM offers you the same high-quality, reliable data you'll find in the 3-volume print set published by ASM in 1990.
Journal ArticleDOI
Critical point wetting
TL;DR: In this paper, it is shown that in any two-phase mixture of fluids near their critical point, contact angles against any third phase become zero in that one of the critical phases completely wets the third phase and excludes contact with the other critical phase.
Journal ArticleDOI
Materials Research Society
Rustum Roy,H. J. Leamy,Christopher C. White,E. N. Kaufmann,R. L. Schwoebel,K. C. Taylor,C. J. Northrup +6 more
Journal ArticleDOI
Alloy solidification in systems containing a liquid miscibility gap
TL;DR: In this article, the phase spacings and transitions in microstructure are discussed in terms of diffusion processes at the monotectic front, with reference to the relative surface energies between two immiscible liquids and a third (solid) phase.