Abstract
The results of the accurate experimental observations on binary Al-Si alloys are presented, which clearly demonstrate that the solidification cracking is a result of the accumulation of macroscopic tensile displacement in a microscopic intergranular liquid film of segregates at the final stage of the weld metal solidification. The reconstructed mechanism of crack initiation provides a clear phenomenological interrelation between the cracking susceptibility, parameters of the welding process and properties of the base and filler material. The correspondent numerical model takes into account the effects of displacement accumulation as well as the influence of thermodynamical and thermo-mechanical properties of the welded material. It is successfully applied for development of technological means for elimination of the solidification cracking during welding of aluminium alloys AA6056, such as a multi-beam welding.
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References
Singer A R E, Jennings P H. Hot-shortness of the aluminiumsilicon alloys of commercial purity. Journal of the Institute of Metals, 1946, 73: 197–212
Singer A R E, Jennings P H. Hot-shortness of some aluminiumiron-silicon alloys of high purity. Journal of the Institute of Metals, 1947, 73: 273–284
Jennings P H, Singer A R E, Pumphrey W I. Hot-shortness of some high-purity alloys in the systems aluminium-copper-silicon and aluminium-magnesium-silicon. Journal of the Institute of Metals, 1948, 74: 227–248
Pumphrey W I, Lyons J V. Cracking during the casting and welding of the more common binary aluminium alloys. Journal of the Institute of Metals, 1948, 74: 439–455
Prokhorov N N. Hot Cracking During Welding. Moscow: Mashgiz, 1952 (in Russian)
Bochvar A A, Rykalin N N, Prokhorov N N, et al. The question of “hot” (crystallisation) cracks. Welding Production, 1960, 10: 5–7 (in Russian)
Prokhorov N N. The technological strength of metals while crystallizing during welding. Welding Production, 1962, 9(4): 1–8 (in Russian)
Jonsson M, Karlsson L, Lindgren L E. Thermal stresses, plate motion and hot cracking in butt-welding. Mechanical Behaviour of Materials IV. New York: Pergamon Press, 1984, 273–279
Dike J J, Brooks J A, Li M. Comparison of failure criteria in weld solidification cracking simulations. In: Cerjak H, ed. Mathematical Modelling of Weld Phenomena 4. London: IOM Communications Ltd., 1998, 199–222
Feng Z. A computational analysis of thermal and mechanical conditions for weld metal solidification cracking. Welding in the World, 1994, 33(5): 340–347
Zaharia T. Dynamic stresses in weld metal hot cracking. Welding Journal, 1994, 73(7): 164s–172s
Dike J J, Brooks J A, Krafcik J S. Finite element modelling and verification of thermal-mechanical behaviour in the weld pool region. In: Smartt H B, Johnson J A, David S A, eds. Trends in Welding Research. ASM International, 1996, 159–164
Feng Z, Zaharia T, David S A. On the thermomechanical conditions for weld metal solidification cracking. In: Cerjak H, ed. Mathematical Modelling of Weld Phenomena 3, 1996, 114–147
Feng Z, Zaharia T, David S A. Thermal stress development in a nickel based superalloy during weldability test. Welding Journal, 1997, 76(11): 470–483
Makhnenko V I, Velikoivanenko E A, Rozynka G F, et al. A computer program for prediction the zones with the risk of formation of hot cracks in welding with deep penetration. The Paton Welding Journal, 1998, 10(2): 57–65
Weise S. Heißrißbildung beim Laserstrahlschweißen von Baustählen. Bremen: BIAS-Verlag, 1998 (in German)
Herold H, Streitenberger M, Pchennikov A. Modelling of the PRV-test to examine the origin of different hot cracking types. In: Cerjak H, ed. Mathematical Modelling of Weld Phenomena 5. London: IOM Communications Ltd., 2001, 783–792
Shibahara M, Serizawa H, Murakawa H. Finite element method for hot cracking analysis under welding using temperature dependent interface element. In: Sahm P R, et al., eds. Modelling of Casting, Welding and Advanced Solidification Processes IX. Aachen: Shaker-Verlag, 2000, 844–851
Shibahara M, Serizawa H, Murakawa H. Finite element method for hot cracking analysis using temperature dependent interface element. In: Cerjak H, ed. Mathematical Modelling of Weld Phenomena 5. London: IOM Communications Ltd., 2001, 253–267
Bergmann H W, Hilbinger R M. Numerical simulation of centre line hot cracks in laser beam welding of aluminium close to the sheet edge. In: Cerjak H, ed. Mathematical Modelling of Weld Phenomena 4. London: IOM Communications Ltd., 1998, 658–668
Hilbinger R M, Bergmann H W, Köhler W, et al. Considering of dynamic mechanical boundary conditions in the characterisation of a hot cracking test by means of numerical simulation. In: Cerjak H, ed. Mathematical Modelling of Weld Phenomena 5. London: IOM Communications Ltd., 2001, 847–862
Hilbinger R M. Heißrissbildung beim Schweißen von Aluminium in Blechrandlage, Universitaet Bayreuth, Bayreuth, 2000 (in German)
Pellini W S. Strain theory of hot tearing. Foundry, 1952, 80: 125–199
Plochikhine V, Prikhodovsky A, Zoch H-W. Zum Mechanismus der Heißrissbildung beim Schweißen von Al-Legierungen. H:arterei-Technische Mitteilungen, 2003, 58(6): 357–362 (in German)
Ploshikhin V, Prikhodovsky A, Ilin A, et al. Mechanical-Metallurgical approach for prediction of solidification cracking in welds. In: Cerjak H, ed. Mathematical Modelling of Weld Phenomena 8. London: IOM Communications Ltd., 87–104
Saunders N, Miodownik A P. CALPHAD (Calculation of Phase Diagrams): A Comprehensive Guide (Pergamon Materials) Series Vol. 1. Elsevier Science, 1998
Andersson J-O, Helander T, Höglund L, et al. Thermo-Calc & DICTRA, computational tools for materials science. Calphad, 2002, 26(2): 273–312
Saunders N. The application of calculated phase equilibria to multi-component aluminium alloys. Journal of Japanese Institute of Light Metals, 2001, 51: 141–150
Akesson B, Karlsson L. Prevention of hot cracking of butt welds in steel panels by controlled additional heating of the panels. Welding Research International, 1976, 6(5): 35–52
Shumilin V G, Karkhin V A, Rakhman M I, et al. A technique of arc welding. USSR Patent, No. 1109280, 1980
Herold H, Streitenberger M, Pchennikov A, et al. Modelling of one sided welding to describe hot cracking at the end of longer butt weld seams. Welding in the World, 1999, 43(2): 56–64
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Ploshikhin, V., Prihodovsky, A. & Ilin, A. Experimental investigation of the hot cracking mechanism in welds on the microscopic scale. Front. Mater. Sci. 5, 135–145 (2011). https://doi.org/10.1007/s11706-011-0135-3
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DOI: https://doi.org/10.1007/s11706-011-0135-3