Hot tearing is a major defect in castings or semifinished cast products. It corresponds to the opening of cracks in the mushy zone and, more precisely, in the areas with high fraction of solid (typically 0.9 and beyond) when the material is subjected to deformations leading to local tensile stress. Various kinds of criteria have been developed to highlight a risk of formation of hot tears. The aim of this study is to evaluate their capability to predict the occurrence of hot tears correctly. In order to do so, two kinds of tests have been analyzed with the use of a thermomechanical finite element model.
Issue Section:
Research Papers
1.
Campbell
, J.
, 1991, Castings
, Butterworth-Heinemann
, Oxford, UK
.2.
Eskin
, D. G.
, Suyitno
, and Katgerman
, L.
, 2004, “Mechanical Properties in the Semi-Solid State and Hot Tearing of Aluminium
,” Prog. Mater. Sci.
0079-6425, 49
, pp. 629
–711
.3.
Decultieux
, F.
, Bellet
, M.
, Lefloc’h
, A.
, Delagnes
, D.
, and Levaillant
, C.
, 1997, “Development of Stress During the Solidification of an Aluminium Alloy: Experimental and Numerical Assessment of Influence of Elasticity Parameters During Solidification
,” Fourth Decennial International Conference on Solidification Processing
, Sheffield, UK
, pp 195
–197
.4.
Drezet
, J.-M.
, and Rappaz
, M.
, 1998, “Study of Hot Tearing in Aluminium Alloys Using the Ring Mold Test
,” Modelling of Casting, Welding and Advanced Solidification Processes VIII
, B. G.
Thomas
and C.
Beckerman
, eds., TMS
, Warrendale, PA
, pp. 883
–890
.5.
Novikov
, I. I.
, and Grushko
, O. E.
, 1995, “Hot Cracking Susceptibility of Al-Cu-Li and Al-Cu-Li-Mn Alloys
,” Mater. Sci. Technol.
0267-0836, 11
, pp. 926
–932
.6.
Instone
, S.
, St John
, D.
, and Grandfield
, J.
, 2000, “New Apparatus for Characterising the Tensile Strength Development and Hot Cracking in the Mushy Zone
,” Int. J. Cast. Metals Res.
, 12
, pp. 441
–456
.7.
Magnin
, B.
, Maenner
, L.
, Katgerman
, L.
, and Engler
, S.
, 1996, “Ductility and Rheology of Al-4.5%Cu Alloy From Room Temperature to Coherency Temperature
,” Mater. Sci. Forum
0255-5476, 217–222
, pp. 1209
–1214
.8.
Ludwig
, O.
, Drezet
, J. M.
, Ménésès
, P.
, Martin
, C.
, and Suéry
, M.
, 2005, “Rheological Behavior of a Commercial AA5182 Aluminum Alloy During Solidification
,” Mater. Sci. Eng., A
0921-5093 413–414
, pp. 174
–179
.9.
Hansson
, K.
, and Fredriksson
, H.
, 2003, “On the Behavior of Hot Crack Formation During Solidification in Fe-Ni Alloys
,” Adv. Eng. Mater.
1438-1656, 5
, pp. 66
–77
.10.
Wintz
, M.
, Bobadilla
, M.
, and Jolivet
, J. M.
, 1994, “Fragilité à la solidification des aciers: influence du carbone, du soufre et du phosphore
,” La revue de Métallurgie, Paper No. RE94014.11.
Bobadilla
, M.
, Chamont
, B.
, Gatellier
, C.
, and Jolivet
, J. M.
, 1988, “Etude de la fragilité à la solidification d’aciers au carbone
,” European Community Assembly
, Convention No. 7210-CA/316, Paper No. RE 88/023.12.
Langlais
, J.
, and Gruzleski
, J. E.
, 2000, “A Novel Approach to Assessing the Hot Tearing Susceptibility of Aluminium Alloys
,” Mater. Sci. Forum
0255-5476, 331–337
, pp. 167
–172
.13.
Zhao
, L.
, Baoyin
, Wang
, N.
, Sahajwalla
, V.
, Pehlke
, R. D.
, 2000, “The Rheological Properties and Hot Tearing Behaviour of an Al-Cu Alloy
,” Int. J. Cast Metals Res.
, 13
, pp. 167
–174
.14.
Prokhorov
, N. N.
, 1962, “Resistance to Hot Tearing of Cast Metals During Solidification
,” Russian Castings Production
, 2
, pp. 172
–175
.15.
Won
, Y. M.
, Yeo
, T. J.
, Seol
, D. J.
, and Oh
, K. H.
, 2000, “A New Criterion for Internal Crack Formation in Continuously Cast Steels
,” Metall. Mater. Trans. B
1073-5615, 31B
, pp. 779
–794
.16.
Clyne
, T. W.
, and Davies
, G. J.
, 1977, “Comparison Between Experimental Data and Theorical Predictions Relating to Dependence of Solidification Cracking on Composition
,” Solidification and Casting of Metals
, Metals Society
, London
, pp. 275
–278
.17.
Rappaz
, M.
, and Drezet
, J. M.
, Gremaud
, M.
, 1999, “A New Hot-Tearing Criterion
,” Metall. Mater. Trans. A
1073-5623, 30A
, pp. 449
–456
.18.
Bellet
, M.
, Jaouen
, O.
, and Poitrault
, I.
, 2005, “An ALE-FEM Approach to the Thermomechanics of Solidification Processes With Application to the Prediction of Pipe Shrinkage
,” Int. J. Numer. Methods Heat Fluid Flow
0961-5539, 15
, pp. 120
–142
.19.
Yamanaka
, A.
, Nakajima
, K.
, Yasumoto
, K.
, Kawashima
, H.
, and Nakai
, K.
, 1991, “Measurement of Critical Strain for Solidification Cracking
,” Modelling of Casting, Welding and Advanced Solidification Processes V
, V. M.
Rappaz
, M. R.
Ozgu
, and K. W.
Mahin
, eds., TMS
, Warrendale, PA
, pp. 279
–284
.Copyright © 2008
by American Society of Mechanical Engineers
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