Abstract
The Charpy impact energy of A356 alloys has been measured. Instrumented Charpy impact tests have been conducted at 25,100,150, and 200 °C. The Charpy specimens were machined from plate castings ortapered cylindrical castings. The plates were produced in sand molds, and tapered cylinders were produced in water-cooled copper molds. Both unmodified and strontium-modified castings were tested. The results indicate that strontium modification improves the impact properties of sand and permanent mold castings. The impact energy increases with solution treatment time. Strontium modification reduces the solution treatment time for attaining a specific impact property level in the casting.
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D. Apelian, S. Shivkumar, and G. Sigworth, Fundamental Aspects of Heat Treatment of Cast Al-Si-Mg Alloys,AFS Trans., Vol 97, p 727–742,1989
S. Shivkumar, S. Ricci Jr., B. Steenhoff, D. Apelian, and G. Sigworth, An Experimental Study to Optimize the Heat Treatment of A356 Alloy, AFSTrans., Vol 97, p 791–810,1989
S. Shivkumar, S. Ricci Jr., and D. Apelian, Effects of Solution Parameters and Simplified Supersaturation Treatments on Tensile Properties of Cast Al-Si-Mg Alloys,AFS Trans., Vol 97, p 913–922,1990
C.W. Meyers, Solution Treatment Effects on Ultimate Tensile Strength and Uniform Elongation in A357 Aluminum Alloys,AFS Trans., Vol 94, p 511–518, 1986
G.D. Scott, B.A. Cheney, and D.A. Granger, Fracture Toughness and Tensile Properties of Directionally Solidified Aluminum Foundry Alloys,Technology for Premium Quality Castings, E. Dunn and D.R. Durham, Ed., The Metallurgical Society, p 123–151,1986
M.J. Couper and J.R. Griffiths, Effects of Crack Closure and Mean Stress on the Threshold Stress Intensity Factor for Fatigue of an Aluminum Casting Alloy,Fract. Eng. Mater. Struct., Vol 13, p 615–624,1990
S.Z. Lu and A. Hellawell, The Mechanism of Silicon Modification in Aluminum-Silicon Alloys: Impurity Induced Twinning,Metall. Trans. A, Vol 18, p 1721–1733, 1987
R. Elliott, Paper No. 10,Proc. 2nd Int. Conf. Molten Aluminum Processing, American Foundrymen’s Society, De Plaines, IL, 1989
I.M. Liftshitz and V.V. Sloyozov, The Kinetics of Precipitation from Supersaturated Solutions,J. Phys. Chem. Solids, Vol 19, p 35–50, 1961
C. Wagner, Theory of the Aging of Precipitates by Redissolution (Ostwald Maturing),Z. Electrochem., Vol 65, p 581–591,1961
B.A. Parker, D.S. Saunders, and J.R. Griffiths, The Quantitative Evaluation of Microstructure of a Strontium-Modified Al-Si-Mg Alloy Following Prolonged Solution Treatment,Met. Forum, Vol 5, p 48–53,1982
J.W. Martin and R.D. Doherty,Stability of Microstructures in Metallic Systems, Cambridge University Press, London, p 210–216, 1980
C.W. Meyers and J.S. Lyons, Fracture Toughness—Second Particle Interactions in A357 Alloys,Technology for Premium Quality Castings, E. Dunn and D.R. Durham, Ed., The Metallurgical Society, p 151–179,1986
C.Q. Chen and J.F. Knott, Effects of Dispersoid Particles on Toughness of High Strength Aluminum Alloys,Met. Sci., Vol 15, p 357–366, 1981
R.H. Sailors,Properties Related to Fracture Toughness, ASTM STP 605, American Society for Testing and Materials, p 34–39, 1976
S. Shivkumar, L. Wang, and C. Keller, unpublished result, 1993
S. Shivkumar, L. Wang, and D. Apelian, Molten Metal Processing of Advanced Cast Aluminum Alloys,JOM, Vol 43, p 26–32,1991
K. Tynelius, “A Parametric Study of the Evolution of Microporosity in Al-Si Foundry Alloys,” Ph.D. thesis, Drexel University, Mar 1992
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Shivkumar, S., Wang, L. & Keller, C. Impact properties of A356-T6 alloys. JMEP 3, 83–90 (1994). https://doi.org/10.1007/BF02654503
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DOI: https://doi.org/10.1007/BF02654503