Neutron Diffraction Analysis of Light Alloys: A Review


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The development and application of low density alloys, such as Al and Mg alloys, has rapidly increased in the automotive sector in recent years. This necessitates advanced characterization techniques to assess the evolution of microstructure and phases during casting and processing. Further, understanding the mechanism of evolution of the defects is important in ensuring their minimization. Neutron diffraction has provided a method to determine the factors that trigger hot tearing in Al and Mg alloys as well as determining factors compromising integrity of powertrain components. In addition, neutron diffraction has been applied to examine the phase evolution during solidification of Al and Mg alloys enabling a better understanding of the effect of inoculants and solute additions on the solidification characteristics, resulting in improved castability. This paper highlights the frontiers of neutron diffraction analysis undertaken by the Centre for Near-Net-Shape Processing of Materials, Ryerson University and the CNL-Canadian Neutron Beam Centre.



Main Theme:

Edited by:

C. Sommitsch, M. Ionescu, B. Mishra, E. Kozeschnik and T. Chandra




A. Lombardi et al., "Neutron Diffraction Analysis of Light Alloys: A Review", Materials Science Forum, Vol. 879, pp. 1558-1563, 2017

Online since:

November 2016




* - Corresponding Author

[1] L. Bichler, Phenomenological Studies of Hot Tearing during Solidification of Magnesium Alloys, PhD Dissertation, Ryerson University, Toronto, Canada (2009).

[2] S. Vogel, J. Carpenter, Brief Introduction to Neutron Scattering and Global Neutron User Facilities, J. Met., 64 (2012)1 04-111.

[3] P. Withers, Mapping Residual and Internal Stresses in Materials by Neutron Diffraction, C R Phys., 8 (2007) 806-820.

[4] L. Bichler, C. Ravindran, Investigations on the Stress and Strain Evolution in AZ91D Magnesium Alloy Castings during Hot Tearing, J. Mater. Eng. Perform., 24 (2015) 2208-2218.


[5] L. Bichler, C. Ravindran, D. Sediako, Onset of Hot Tearing in AE42 Magnesium Alloy, Can. Metall. Q., 48 (2009) 81-89.


[6] F. D'Elia, C. Ravindran, D. Sediako, Interplay Among Solidification, Microstructure, Residual Strain and Hot Tearing in B206 Aluminum Alloy, Mater. Sci. Eng. A., 624 (2015) 169-180.


[7] A. Lombardi, C. Ravindran, D. Sediako, R. MacKay, Determining the Mechanism of In-Service Cylinder Distortion in Aluminum Engine Blocks with Cast-in Gray Iron Liners, Metall. Mater. Trans. A., 45(2014) 6291-6303.


[8] A. Lombardi, Mitigation of Cylinder Distortion in Aluminum Alloy Engine Blocks via Heat Treatment Process Optimization, PhD Dissertation, Ryerson University, Toronto, Canada (2015).

[9] A. Lombardi, D. Sediako, A. Machin, C. Ravindran, R. MacKay, Transient Analysis of Residual Strain during Heat Treatment of Multi-Material Engine Blocks using In-situ Neutron Diffraction, Mater. Lett., 157 (2015) 50-52.


[10] A. Lombardi, D. Sediako, C. Ravindran, R. MacKay, Residual Stress Mapping along the Cylinder Bores of Al Alloy Engine Blocks Subjected to Production Solution Heat Treatment Schedule, SAE Int. J. Mater. Manuf., 7 (2014) 415-420.


[11] D.G. Sediako, W. Kasprzak, In-situ Study of Microstructure Evolution in Solidification of Hypereutectic Al-Si Alloys with Application of Thermal Analysis and Neutron Diffraction, Metall. Mater. Trans. A., 46 (2015) 4160-4173.


[12] A. Elsayed, D. Sediako, C. Ravindran, Investigation of Solidification Behaviour of Mg-6Al and Mg-9Al Alloys using In-situ Neutron Diffraction, Can. Metall. Q., 54 (2015) 16-23.


[13] F. D'Elia, C. Ravindran, D. Sediako, R. Donaberger, Solidification Analysis of Al-5wt-%Cu Alloy using In-situ Neutron Diffraction, Can. Metall. Q., 54 (2015) 9-15.

[14] F. D'Elia, C. Ravindran, D. Sediako, K.U. Kainer, N. Hort, Hot Tearing Mechanisms of B206 Aluminum-Copper Alloy, Mater. Des., 64 (2014) 44-55.