Abstract
Hot tearing is a common and severe defect in casting and it is perhaps the pivotal issue defining an alloy’s castability. The subject has been extensively studied through various perspectives for decades and more recently computational models have been developed; however, despite these accomplishments there is confusion in the literature. The governing mechanisms and the control of hot tearing are not totally clear. Experiments show inconsistent results and different opinions exist about what roles processing or alloy factors play. WPI’s Casting Center (ACRC) initiated a major project devoted to developing a reliable experimental apparatus/methodology to quantitatively study hot tearing and to use it in studying the effects of various parameters on hot tearing. As part of this endeavor, a comprehensive literature review was conducted. The review focuses on: (i) Theories of hot tearing; (ii) Hot tearing variables; and (iii) Test methods. A summary of hot tearing criteria/models are also provided.
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References
Monroe, C., Beckermann, C., “Development of a Hot Tear Indicator for Steel Castings,” Materials Science and Engineering A, vol. 413-414, pp. 30–36 (2005).
Campbell, J., Castings, Oxford: Butterworth-Heinemann (1991).
Novikov, I. I., “Goryachelomkost Tsvetnykh Metallov i Splavov (Hot Shortness of Non-Ferrous Metals and Alloys),” p. 299 (1966).
Sigworth, G. K., “Hot Tearing of Metals,” AFS Transactions, vol. 104, pp. 1053–1062 (1996).
Eskin, D. G., Suyitno, Katgerman, L., “Mechanical Properties in the Semi-Solid Sate and Hot Tearing of Aluminum Alloys,” Progress in Materials Science, vol. 49, pp. 629–711 (2004).
Metz, S. A., Flemings, M. C., “A Fundamental Study of Hot Tearing,” AFS Transactions, vol. 78, pp. 453–460 (1970).
Körber, F., Schitzkowski, G., “Determination of the Contraction of Cast Steel,” Stahl Und Eisen, vol. 15, pp. 128–135 (1928).
Briggs, C. W., The Metallurgy of Steel Castings, McGraw-Hill, London, p. 317 (1946).
Middleton, J. M., Protheroe, H. T., “The Hot-Tearing of Steel,” Journal of the Iron and Steel Institute, vol. 168, pp. 384–397 (1951).
Briggs, C. W., Gezelius, R. A., “Studies on Solidification and Contraction in Steel Castings II-Free and Hindered Contraction of Cast Carbon Steel,” AFA Trans, vol. 42, pp. 449–476 (1934).
Briggs, C. W., Gezelius, R. A., “Studies on Solidification and Contraction in Steel Castings IV-the Free and Hindered Contraction of Alloy Cast Steels,” AFA Trans, vol. 44, pp. 1–32 (1936).
Verö, J., “The Hot-Shortness of Aluminum Alloys,” The Metals Industry, vol. 48, pp. 431–434, 442 (1936).
Pumphrey, W. I., Jennings, P. H., “A Consideration of the Nature of Brittleness at Temperature Above the Solidus in Castings and Welds in Aluminum Alloys,” J. Inst. Metals, vol. 75, pp. 235 (1948).
Bishop, H. F., Ackerlind, C. G., Pellini, W. S., “Metallurgy and Mechanics of Hot Tearing,” AFS Transactions, vol. 60, pp. 818–833 (1952).
Pellini, W. S., “Strain Theory of Hot Tearing,” Foundry, vol. 80, pp. 125–199 (1952).
Bishop, H. F., Ackerlind, C. G., Pellini, W. S., “Investigation of Metallurgical and Mechanical Effects in the Development of Hot Tearing,” AFS Transactions, vol. 65, pp. 247–258 (1957).
Davidson, C., Viano, D., Lu, L., Stjohn, D., “Observation of Crack Initiation during Hot Tearing,” International Journal of Cast Metals Research, vol. 19, pp. 59–65 (2006).
Saveiko, V. N., “Theory of Hot Tearing,” Russian Castings Production, vol. 11, pp. 453–456 (1961).
Rosenberg, R. A., Flemings, M. C., Taylor, H. F., “Nonferrous Binary Alloys Hot Tearing,” AFS Transactions, vol. 69, pp. 518–528 (1960).
Clyne, T. W., Davies, G. J., “A Quantitative Solidification Test for Casting and an Evaluation of Cracking in Aluminium-Magnesium Alloys,” The British Foundrymen, vol. 68, pp. 238–244 (1975).
Pumphrey, W. I., Lyons, J. V., “Cracking during the Casting and Welding of the More Common Binary Aluminum Alloys,” J. Inst. Met., vol. 118, pp. 439–455 (1948).
Upadhya, G., Cheng, S., Chandra, U., “A Mathematical Model for Prediction of Hot Tears in Castings,” Light Metals, pp. 1101–1106 (1995).
Chamberlain, B., Watanabe, S., “A Natural Aging Aluminum Alloy, Designed for Permanent Mold Use,” AFS Transactions, vol. 85, pp. 133–142 (1977).
Sigworth, G. K., Rios, O., Howell, J., Kaufman, M., “Development Program on Natural Aging Alloys,” AFS Transactions, vol. 112, pp. 387–408 (2004).
Dodd, R. A., Pollard, W. A., Meier, J. W., “Hot Tearing of Magnesium Casting Alloys,” AFS Transactions, vol. 65, pp. 100–118 (1957).
Pekguleryuz, M. O., Vermette, P., “A Study on Hot-Tear Resistance of Magnesium Diecasting Alloys,” AFS Transactions, vol. 114, pp. 729–736 (2006).
Spittle, J. A., Cushway, A. A., “Influence of Superheat and Grain Structure on Hot-Tearing Susceptibilities of Al-Cu Alloy Castings,” Metals Technology, vol. 10, no. 1, pp. 6–13 (1983).
Sadayappan, M., Sahoo, M., Shkuka, M., Yang, B. J., Smith, R. W., “Effect of Melt Processing and Magnetic Field on the Hot Tearing of Al-Cu Alloy A201,” AFS Transactions, vol. 110, pp. 407–415 (2002).
Easton, M., Grandfield, J., St John, D., Rinderer, B., “The Effect of Grain Refinement and Cooling Rate on the Hot Tearing of Wrought Aluminum Alloys,” Materials Science Forum, vol. 30, pp. 1675–1680 (2006).
Easton, M., Wang, H., Grandfield, J., St John, D., Sweet, E., “An Analysis of the Effect of Grain Refinement on the Hot Tearing of Aluminum Alloys,” Materials Science Forum, vol. 28, pp. 224–229 (2004).
Lin, S., Aliravci, C., Pekguleryuz, M. O., “Hot-Tear Susceptibility of Aluminum Wrought Alloys and the Effect of Grain Refining,” Metallurgical and Materials Transactions A, vol. 38, pp. 1056–1068 (2007).
D’Elia, F., Ravindran, C., “Effect of Ti-B Grain Refiner on Hot Tearing in Permanent Mold Cast B206 Aluminum Alloy,” AFS Transactions, vol. 117, pp. 139–148 (2009).
Matsuda, F., Nakata, K., Shimokusu, Y., “Effect of Additional Element on Weld Solidification Crack Susceptibility of Al-Zn-mg (Report I),” Transactions of Japanese Welding Research Institute, vol. 12, no. 1, pp. 81–87 (1983).
Spencer, D. B., Mehrabian, R., Flemings, M. C., “Rheological Behavior of Sn-15 Pct Pb in the Crystallization Range”, Metallurgical & Materials Transactions B, vol. 3, no. 7, pp. 1925–1932 (1972).
Rodriguez, A., Chavez, R., Hernandez, J., Raymond, Y., Major, F. J., “Casting Trials for a Modified 206 Aluminum Alloy that Approaches the Strength of Ductile Iron without Hot Cracking Produced Encouraging Results,” Modern Casting, vol. 100, No. 1, pp. 42–44 (2010).
Fasoyinu, F. A., Sadayappan, M., Cousineau, D., Sahoo, M., “Effect of Grain Refinement on the Hot Tear Resistance and Shrinkage Characteristics of Permanent Mold Cast Yellow Brass (C85800),” AFS Transactions, vol. 106, 327–338 (1998).
Warrington, D., McCartney, D. G., “Hot-Cracking in Aluminum Alloys 7050 and 7010 — a Comparative Study,” Cast Metals, vol. 3, no. 4, pp. 202–208 (1991).
Rappaz, M., Drezet, J.-M., Gremaud, M., “A New Hot Tearing Criterion,” Metallurgical and Materials Transactions A, vol. 30, no. 2, pp. 449–455 (1999).
Grandfield, J. F., Davidson, C. J., Taylor, J. A., “The Columnar to Equiaxed Transition in Horizontal Direct Chill Cast Magnesium Alloy AZ91,” Light Metals, 911–917 (2001).
Singer, K., Benek, H., “Contribution to Hot Tears in Steel Castings,” Stahl and Sisen, vol. 51, pp. 61–65 (1931).
Bichler, L., Elsayed, A., Lee, K., Ravindran, C., “Influence of Mold and Pouring Temperatures on Hot Tearing Susceptibility of AZ91D Magnesium Alloy,” International Journal of Metalcasting, vol. 2, no. 1, pp. 43–54 (2008).
Couture, A., Edwards, J. O., “The Hot-Tearing of Copper-Base Casting Alloys,” AFS Transactions, vol. 74, pp. 709–721 (1966).
Lin, S., A Study of Hot Tearing in Wrought Aluminum Alloys, Ph.D. ed., University of Québec in Chicoutimi, Chicoutimi, PQ, Canada (1999).
Zhen, Z., Hort, N., Utke, O., Huang, Y., Petri, N., Kainer, K. U., “Investigations on Hot Tearing of mg-Al Binary Alloys by Using a New Quantitative Method,” Magnesium Technology (2009).
Limmaneevichitr, C., Saisiang, A., Chanpum, S., “The Role of Grain Refinement on Hot Crack Susceptibility of Aluminum Alloy Permanent Mold Castings,” Proceedings of the 65th World Foundry Congress (2002).
Sadayappan, M., Sahoo, M., Weiss, D., “Evaluation of the Hot Tear Susceptibility of Selected Magnesium Casting Alloys in Permanent Molds,” AFS Transactions, vol. 115, pp. 761–766 (2007).
Fasoyinu, Y., Sahoo, M., Sikorski, S., “Hot Tearing of Aluminum Alloys 206 and 535 Poured in Metal Mold,” Proceedings of the AFS 6th International Conference on Permanent Mold Casting of Aluminum and Magnesium, pp. 11–25 (2008).
Hall, H. F., “The Strength and Ductility of Cast Steel during Cooling from the Liquid State in Sand Mold,” Journal of the Iron and Steel Institute, vol. 15, pp. 65–93 (1936).
Singer, A. R. E., Jennings, P. H., “Hot-Shortness of the Aluminium-1043 Silicon Alloys of Commercial Purity,” J. Inst. Metals, vol. 72, pp. 197–211 (1946).
Oya, S., Hanma, U., Fujii, J., Othaki, M., “Evaluation of Hot Tearing in Binary Al-Si Alloy Castings,” Aluminium, vol. 60, no. 20, p. 777 (1984).
Paray, F., Kulunk, B., Gruzleski, J. E., “Hot Tearing in 319 Alloy,” Int. J. Cast Metals Res., vol. 13, pp. 147–159 (2000).
Gamber, E. J., “Hot Cracking Test for Light Metal Casting Alloys,” AFS Transactions, vol. 67, pp. 237–241 (1959).
Singer, A. R. E., Jennings, P. H., “Properties of the Al-Si Alloys at Temperatures in the Region of the Solidus,” J. Inst. Metals, vol. 73, p. 33 (1947).
Langlais, J., Gruzleski, J. E., “A Novel Approach to Assessing the Hot Tearing Susceptibility of Aluminum Alloy,” Materials Science Forum, vol. 331-337, pp. 167–172 (2000).
Hamaker, J. C., Wood, W. P., “Influence of Phosphorus on Hot Tear Resistance of Plain and Alloy Gray Iron,” AFS Transactions, vol. 60, pp. 501–510 (1952).
Guven, Y. F., Hunt, J. D., “Hot-Tearing in Aluminum Copper Alloys,” Cast Metals, vol. 1, no. 2, pp. 104–111 (1988).
Taumura, H., Kato, N., Ochiai, S., Katagiri, Y., “Cracking Study of Aluminum Alloys by the Variable Tensile Strain Hot Cracking Test,” Trans. Jpn. Welding Soc., vol. 8, no. 2, pp. 63–69 (1977).
Instone, S., St John, D., Grandfield, J., “New Apparatus for Characterizing Tensile Strength Development and Hot Cracking in the Mushy Zone,” International Journal of Cast Metals Research, vol. 12, no. 6, pp. 441–456 (2000).
Viano, D., St John, D., Grandfield, J., Cáceres, C., “Hot Tearing in Aluminium-Copper Alloys,” Light Metal (2005).
Eskine, D., Zuidema, J., Jr., Katgerman, L., “Linear Solidification Contraction of Binary and Commercial Aluminium Alloys,” International Journal of Cast Metals Research, vol. 14, pp. 217–224 (2002).
Eskin, D. G., Suyitno, Mooney J.F., Katgerman, L., “Contraction of Aluminum Alloys during and After Solidification,” Metallurgical and Materials Transactions A, vol. 35, pp. 1325–1335 (2004).
Stangeland, A., Mo, A., Dielsen, Ø., Eskin, D., Mhamdi, M., “Development of Thermal Strain in the Coherent Mushy Zone during Solidification of Aluminum Alloys,” Metallurgical and Materials Transactions A, vol. 35, p. 2903 (2004).
Cao, G., Kou, S., “Hot Tearing of Ternary mg-Al-Ca Alloy Castings,” Metallurgical and Materials Transactions A, vol. 37A, p. 3647 (2006).
Zhen, Z., Hort, N., Huang, Y., Petri, N., Utke, O., Kainer, K. U., “Quantitative Determination on Hot Tearing in mg-Al Binary Alloys,” Materials Science Forum, vol. 618-619, pp. 533–540 (2009).
Eskin, D. G., Katgerman, L., “A Quest for a New Hot Tearing Criterion,” Metallurgical and Materials Transactions A, vol. 38, pp. 1511–1519 (2007).
Suyitno, Kool, W. H., Katgerman, L., “Hot Tearing Criteria Evaluation for Direct-Chill Casting of an Al-4.5 Pct Cu Alloy,” Metallurgical and Materials Transactions A, vol. 36A, pp. 1537–1546 (2005).
Suyitno, Kool, W. H., Katgerman, L., “Evaluation of Mechanical and Non-Mechanical Hot Tearing Criteria for DC Casting of an Aluminum Alloy,” Light Metals, pp. 753–758 (2003).
Dickhaus, C. H., Ohm, L., Engler, S., “Mechanical Properties of Solidifying Shell of Aluminum Alloys,” AFS Transactions, vol. 101, pp. 677 (1994).
Lahaie, D. J., Bounchard, M., “Physical Modeling of the Deformation Mechanisms of Semisolid Bodies and a Mechanical Criterion for Hot Tearing,” Metallurgical and Materials Transactions B, vol. 32, p. 697 (2001).
Williams, J. A., Singer, A. R. E., “Deformation, Strength, and Fracture Above the Solidus Temperature,” J. Inst. Met., vol. 96, pp. 5–12 (1968).
Zhao, L. Y., Baoyin, Wang, N., Sahajwalla, V., Pehlke, R. D., “The Rheological Properties and Hot Tearing Behavior of an Al-Cu Alloy,” International Journal of Cast Metals Research, vol. 13, no. 3, pp. 167–174 (2000).
Magnin, B., Maenner, L., Katgerman, L., Engler, S., “Ductility and Theology of an Al-4.5%Cu Alloy from Room Temperature to Coherency Temperature,” Mater Science Forum, vol. 1209, pp. 217–222 (1996).
Prokhorov, N. N., “Resistance to Hot Tearing of Cast Metals during Solidification,” Russian Castings Production, vol. 2, pp. 172–175 (1962).
Braccini, M., Martin, C. L., Suéry, M., Bréchet, Y., “Modeling of Casting,” Welding and Advanced Solidification Processes IX, pp. 18–24 (2000).
M’Hamdi, M., Mo, A., Fjær, H. G., TearSim, “A Two-Phase Model Addressing Hot Tearing Formation during Aluminum Direct Chill Casting,” Metallurgical and Materials Transactions A, vol. 37, pp. 3069–3083 (2006).
Clyne, T.W., Davies, G. J., “Solidification and Casting of Metals,” pp. 275–278 (1979).
Katgerman, L., “A Mathematical Model for Hot Cracking of Aluminum Alloys during DC Casting,” J. of Metals, vol. 34, pp. 46–49 (1982)
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Li, S., Apelian, D. Hot Tearing of Aluminum Alloys. Inter Metalcast 5, 23–40 (2011). https://doi.org/10.1007/BF03355505
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DOI: https://doi.org/10.1007/BF03355505