Quadratic Model for Predicting the Hardness of Heat Affected Zone in Water Cooled Cast Iron Weldment In Relation to Similarly Cooled Aluminum and Mild Steel Weldments
Author(s)
C. I. Nwoye*
Affiliation(s)
Department of Materials and Metallurgical Engineering, Federal University of Technology,P.M.B 1526, Owerri, Nigeria..
Department of Materials and Metallurgical Engineering, Federal University of Technology,P.M.B 1526, Owerri, Nigeria..
ABSTRACT
Quadratic and linear models have been derived for predicting the heat-affected zone (HAZ) hardness of water cooled cast iron weldment in relation to the combined and respective values of the heat-affected zone hardness of aluminum and mild steel welded and cooled under the same conditions. It was found that the validity of the model is rooted on the fractional expression; γ/3.0749θ + γ/3.0749β + θ/3.0749β = 1. The respective deviations of the model-predicted heataffected zone hardness values of aluminum, cast iron and mild steel from the corresponding experimental values were less than 0.01% which is quite insignificant, indicating reliability of the model.
Quadratic and linear models have been derived for predicting the heat-affected zone (HAZ) hardness of water cooled cast iron weldment in relation to the combined and respective values of the heat-affected zone hardness of aluminum and mild steel welded and cooled under the same conditions. It was found that the validity of the model is rooted on the fractional expression; γ/3.0749θ + γ/3.0749β + θ/3.0749β = 1. The respective deviations of the model-predicted heataffected zone hardness values of aluminum, cast iron and mild steel from the corresponding experimental values were less than 0.01% which is quite insignificant, indicating reliability of the model.
Cite this paper
C. Nwoye, "Quadratic Model for Predicting the Hardness of Heat Affected Zone in Water Cooled Cast Iron Weldment In Relation to Similarly Cooled Aluminum and Mild Steel Weldments," Journal of Minerals and Materials Characterization and Engineering, Vol. 8 No. 10, 2009, pp. 765-773. doi: 10.4236/jmmce.2009.810066.
C. Nwoye, "Quadratic Model for Predicting the Hardness of Heat Affected Zone in Water Cooled Cast Iron Weldment In Relation to Similarly Cooled Aluminum and Mild Steel Weldments," Journal of Minerals and Materials Characterization and Engineering, Vol. 8 No. 10, 2009, pp. 765-773. doi: 10.4236/jmmce.2009.810066.
References
[1] Davies, A. C., (1993). The Science and Practice of Welding, 10th Edition, Cambridge University Press, p521. [2] Higgins, R. A., (1994). Engineering Metallurgy, Arc Welding Processes, 2nd Edition, Edward Arnold Publishers, London.p57. [3] Lancaster, J. F., (1993). Metallurgy of Welding 5th Edition, London. Chapman and Hall p389. [4] Callister, W.D., (Jnr.) (1996). Material Science and Engineering. An introduction, 1st Edition, Sydney John Wiley & Sons inc. p852. [5] Higgins, R. A., (1977). Engineering Metallurgy Part II, 2nd Edition, London, ELBS, p466. [6] Nnuka, E. E., Ovat, F. A., and Oseni, M. I., (2008). Effect of Electrode Types on the Mechanical Properties and Structure of Welded Steel Joints. JMME Vol. 3, No. 1. [7] Lancaster, J. F., (1987). Metallurgy of Welding: The Mechanical Properties of the Heat Affected Zone, 4th Edition, Allen and University, London. p45. [8] Nwoye, C. I. (2008). Comparative Studies of the Cooling Ability of Hydrocarbon Based Media and their Effects on the Hardness of the Heat Affected Zone (HAZ) in Weldments, JMME, Vol.3, No.1 [9] Stroud, K. A., (1986). Further Engineering Mathematics. 1st edition, Macmillan Education, London. p47.
[1] Davies, A. C., (1993). The Science and Practice of Welding, 10th Edition, Cambridge University Press, p521. [2] Higgins, R. A., (1994). Engineering Metallurgy, Arc Welding Processes, 2nd Edition, Edward Arnold Publishers, London.p57. [3] Lancaster, J. F., (1993). Metallurgy of Welding 5th Edition, London. Chapman and Hall p389. [4] Callister, W.D., (Jnr.) (1996). Material Science and Engineering. An introduction, 1st Edition, Sydney John Wiley & Sons inc. p852. [5] Higgins, R. A., (1977). Engineering Metallurgy Part II, 2nd Edition, London, ELBS, p466. [6] Nnuka, E. E., Ovat, F. A., and Oseni, M. I., (2008). Effect of Electrode Types on the Mechanical Properties and Structure of Welded Steel Joints. JMME Vol. 3, No. 1. [7] Lancaster, J. F., (1987). Metallurgy of Welding: The Mechanical Properties of the Heat Affected Zone, 4th Edition, Allen and University, London. p45. [8] Nwoye, C. I. (2008). Comparative Studies of the Cooling Ability of Hydrocarbon Based Media and their Effects on the Hardness of the Heat Affected Zone (HAZ) in Weldments, JMME, Vol.3, No.1 [9] Stroud, K. A., (1986). Further Engineering Mathematics. 1st edition, Macmillan Education, London. p47.