Effect of runner thickness and hydrogen content on the mechanical properties of A356 alloy castings

Journal article


Hassanin, H., El-Sayed, M. and Essa, K. 2021. Effect of runner thickness and hydrogen content on the mechanical properties of A356 alloy castings . International Journal of Metalcasting.
AuthorsHassanin, H., El-Sayed, M. and Essa, K.
Abstract

Earlier studies demonstrated the detrimental effect of entrained bifilm defects on aluminum cast alloys’ tensile and fatigue properties. It was suggested that hydrogen has a contributing role as it diffuses into the bifilms and swells them out to form hydrogen porosity. In this study, the effect of the runner height and hydrogen content on the properties of A356 alloy castings was investigated using a two-level full factorial design of experiments. Four responses, the Weibull modulus and position parameter of both the ultimate tensile strength (UTS) and % elongation, were assessed. The results suggested that decreasing the runner height and adopting procedures intended to decrease the hydrogen content of the casting caused a considerable enhancement of the Weibull moduli and position parameters of the UTS and % elongation. This was reasoned to the more quiescent practice during mold filling, eliminating the possibility of bifilm formation as well as the decreased hydrogen level that eliminated the amount of hydrogen diffused into the bifilms and accordingly decreased the size of the entrained defects. This, in turn, would allow the production of A356 cast alloys with better and more reproducible properties.

KeywordsBifilm; A356 alloy; Hydrogen; Design of experiments; Mechanical properties
Year2021
JournalInternational Journal of Metalcasting
PublisherSpringer Nature
ISSN1939-5981
2163-3193
Publication process dates
Accepted28 Dec 2021
Deposited05 Jan 2022
Accepted author manuscript
File Access Level
Restricted
Output statusIn press
References

1. Griffiths, W.D., A. Elsayed, and M.A. El-Sayed, Whisker formation in porosity in Al alloys. Metallurgical and Materials Transactions B, 2016. 47(6): p. 3459-3468.
2. El-Sayed, M.A., Effect of welding conditions on the mechanical properties of friction stir welded 1050 aluminum alloy. International Review of Mechanical Engineering, 2015. 9(3): p. 252-256.
3. Youssef, Y. and M. El-Sayed, Effect of reinforcement particle size and weight fraction on the mechanical properties of SiC particle reinforced Al metal matrix composites. International Review of Mechanical Engineering, 2016. 10(4).
4. Campbell, J., Entrainment defects. Materials science and technology, 2006. 22(2): p. 127-145.
5. Ammar, H., et al., The Concept of Quality Index and Its Application for Al–Si Cast Alloys. International Journal of Metalcasting, 2021: p. 1-16.
6. Griffiths, W. and N.-W. Lai, Double oxide film defects in cast magnesium alloy. Metallurgical and materials transactions A, 2007. 38(1): p. 190-196.
7. El-Sayed, M.A.M., Double oxide film defects and mechanical properties in aluminium alloys. 2012, University of Birmingham.
8. El-Sayed, M.A., et al., Determination of the lifetime of a double-oxide film in al castings. Metallurgical and Materials Transactions B, 2014. 45(4): p. 1398-1406.
9. El-Sayed, M.A. and K. Essa, Effect of mould type and solidification time on bifilm defects and mechanical properties of Al–7si–0.3 mg alloy castings. Computational and Experimental Studies, 2018: p. 23.
10. El-Sayed, M., et al. A study of the behaviour of double oxide films in Al alloy melts. in Materials Science Forum. 2013. Trans Tech Publications Ltd.
11. El-Sayed, M. and M. Ghazy, Entrained defects in light metal cast alloys. Journal of the Southern African Institute of Mining and Metallurgy, 2017. 117(7): p. 656-662.
12. El-Sayed, M., An investigation of the behaviour of double oxide film defects in aluminium-magnesium cast alloys. Journal of the Southern African Institute of Mining and Metallurgy, 2018. 118(11): p. 1225-1231.
13. Basuny, F.H., et al., Effect of casting conditions on the fracture strength of Al-5 Mg alloy castings. Advances in Materials Science and Engineering, 2016. 2016.
14. Lai, N., W. Griffiths, and J. Campbell, Modelling of the potential for oxide film entrainment in light metal alloy castings. Modeling of Casting, Welding and Advanced Solidification Processes-X, 2003: p. 415-422.
15. Griffiths, W.D., A. Caden, and M. El-Sayed. An investigation into double oxide film defects in aluminium alloys. in Materials Science Forum. 2014. Trans Tech Publications Ltd.
16. Griffiths, W., A. Caden, and M. El‐Sayed. The Behaviour of Entrainment Defects in Aluminium Alloy Castings. in Proceedings of the 2013 International Symposium on Liquid Metal Processing and Casting. 2014. John Wiley & Sons, Inc.
17. Campbell, J., Castings. 2nd. ed. 2003: Butterworth-Heinemann.
18. Campbell, J., Entrainment defects. Materials Science and Technology, 2006. 22: p. 127-145.
19. Hsu, F.-Y. and C.-L. Li, Runner Systems Containing Ceramic Foam Filters Quantified by “Area Normalized” Bifilm Index Map. International Journal of Metalcasting, 2015. 9(3): p. 23-35.
20. Runyoro, J., S.M.A. Boutorabi, and J. Campbell, Critical gate velocities for film-forming casting alloys: a basic for process specification. AFS Trans., 1992. 100: p. 225-234.
21. Halvaee, A. and J. Campbell, Critical mold entry velocity for aluminum bronze castings. AFS Trans., 1997. 105: p. 35-46.
22. Bahreinian, F., S.M.A. Boutorabi, and J. Campbell, Critical gate velocity for magnesium casting alloy (ZK51A). International Journal of Cast Metals Research, 2006. 19: p. 45-51.
23. Cox, M., et al., Effect of top and bottom filling on reliability of investment castings in Al, Fe, and Ni based alloys. Materials Science and Technology, 2000. 16: p. 1445-1452.
24. Jacob, S. Quality Index in Prediction of Properties of Aluminum Castings- A Review. in Transactions of the American Foundry Society and the One Hundred Fourth Annual Castings Congress. 2000.
25. Riestra, M., et al., Complexities in the assessment of melt quality. International Journal of Metalcasting, 2018. 12(3): p. 441-448.
26. Sigworth, G., Understanding quality in aluminum castings. International Journal of Metalcasting, 2011. 5(1): p. 7-22.
27. Tiryakioğlu, M. and J. Campbell, Quality index for aluminum alloy castings. International Journal of Metalcasting, 2014. 8(3): p. 39-42.
28. Dispinar, D. and J. Campbell, Critical assessment of reduced pressure test. Part 1: porosity phenomena. International Journal of Cast Metals Research, 2004. 17: p. 280-286.
29. Uludağ, M., et al., On the interpretation of melt quality assessment of A356 aluminum alloy by the reduced pressure test: the Bifilm index and its physical meaning. International Journal of Metalcasting, 2018. 12(4): p. 853-860.
30. El-Sayed, M.A., H. Hassanin, and K. Essa, Bifilm defects and porosity in Al cast alloys. The International Journal of Advanced Manufacturing Technology, 2016. 86(5): p. 1173-1179.
31. El-Sayed, M., H. Hassanin, and K. Essa, Effect of casting practice on the reliability of Al cast alloys. International Journal of Cast Metals Research, 2016. 29(6): p. 350-354.
32. El-Sayed, M. and W. Griffiths, Hydrogen, bifilms and mechanical properties of Al castings. International Journal of Cast Metals Research, 2014. 27(5): p. 282-287.
33. El-Sayed, M.A., The behaviour of bifilm defects in cast Al-7Si-Mg alloy. PloS one, 2016. 11(8): p. e0160633.
34. Hassanin, H., et al., Controlling the properties of additively manufactured cellular structures using machine learning approaches. Advanced Engineering Materials, 2020. 22(3): p. 1901338.
35. El-Sayed, M.A., et al., Design optimization of additively manufactured titanium lattice structures for biomedical implants. The International Journal of Advanced Manufacturing Technology, 2020: p. 1-12.
36. Croarkin, C., P. Tobias, and C. Zey, Engineering statistics handbook. 2002: NIST iTL.
37. Kuo, J.-K., et al., Optimal gating system design for investment casting of 17-4PH stainless steel enclosed impeller by numerical simulation and experimental verification. The International Journal of Advanced Manufacturing Technology, 2017. 92(1): p. 1093-1103.
38. Anjo, V. and R. Khan, Gating system design for casting thin aluminium alloy (Al-Si) plates. Leonardo Electronic Journal of Practices and Technologies, 2013. 12(23): p. 51-62.
39. El-Sayed, M., H. Hassanin, and K. Essa, Bifilm defects and porosity in Al cast alloys. The International Journal of Advanced Manufacturing Technology, 2016. 86(5-8): p. 1173-1179.
40. Winardi, L., et al., Variables Affecting Gas Evolution Rates and Volumes from Cores in Contact with Molten Metal. AFS Transactions, 2008. 116: p. 505-521.
41. Weibull, W., A statistical distribution function of wide applicability. J. Appl. Mech, 1951. 13: p. 293-297.
42. Green, N.R. and J. Campbell, Statistical distributions of fracture strengths of cast Al-7Si-Mg alloy. Materials Science and Engineering: A, 1993. 173(1-2): p. 261-266.
43. Nayak, A.K., D. Pal, and K. Santra, Ispaghula mucilage-gellan mucoadhesive beads of metformin HCl: Development by response surface methodology. Carbohydrate Polymers, 2014. 107(Supplement C): p. 41-50.
44. El-Sayed, M.A. and W.D. Griffiths, Hydrogen, bifilms and mechanical properties of al castings. International Journal of Cast Metals Research, 2014. 27(5): p. 282-287.
45. Raiszadeh, R. and W.D. Griffiths, A method to study the history of a double oxide film defect in liquid aluminum alloys. Metallurgical and Materials Transactions B, 2006. 37(6): p. 865-871.
46. El-Sayed, M., et al., Effect of Holding Time before Solidification on Double-Oxide Film Defects and Mechanical Properties of Aluminium Alloys, in Shape Casting. 2011, John Wiley & Sons, Inc. p. 149-156.
47. Green, N. and J. Campbell, Influence of oxide film filling defects on the strength of Al-7Si-Mg alloy castings. AFS Trans., 1994. 102: p. 341-347.

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