Microstructure and Strain Distribution Influence on Failure Properties in Eutectic AlNi, AlFe Alloys

Abstract:

Article Preview

Eutectic AlNi, AlFe, alloys exhibit plastic strains to failure (usually in the range of 1%- 5%), that those of structural alloys. We have developed a technique to measure strains at the scale of the microstructure and have used this method to assess the variation in failure properties with microstructure. This method is capable of using the grayscale information in the image of a gridded sample to obtain sub-pixel marker displacement, and can therefore accurately determine small strain values. Microstructures that exhibit large variation in local strain distribution tend to have higher variability in tensile properties, particularly tensile ductility, compared to microstructures that accumulate strain more uniformly. Orientation and morphology of lamellar plates in lamellar colonies play, also, a role in influencing the distribution of strain. Local grain orientation, phase distribution and segregation are factors influencing the strain distribution, and therefore the properties of these materials.

Info:

Periodical:

Edited by:

P. B. Prangnell and P. S. Bate

Pages:

247-252

Citation:

P. Olaru et al., "Microstructure and Strain Distribution Influence on Failure Properties in Eutectic AlNi, AlFe Alloys", Materials Science Forum, Vol. 550, pp. 247-252, 2007

Online since:

July 2007

Export:

Price:

$38.00

[1] G. Gottstein and L. S. Shvindlerman, Grain Boundary Migration in Metals, (1999), CRC Series in Materials Science and Technology, CRC Press Florida U.S. A.

[2] A. D . Rollet and D. Raabe, Comp. Mater. Sci. Vol. 21 (2001), p.69.

[3] C. Maurice, "Proceeding of the first joint international Conference, ReX &GG1, Springer Berlin, (2001), p.123.

[4] P. C. Olaru, "Proceeding of the first joint international Conference, ReX &GG1, Springer Berlin, (2001) , p.239.

[5] M. J. Blackburn, J. C. Williams, Transactions of the Metallurgical Society of AIME, Vol. 239 (1967), p.287.

Fetching data from Crossref.
This may take some time to load.