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In-Situ Observation of Deformation Processes by OIM

Published online by Cambridge University Press:  02 July 2020

Hasso Weiland
Affiliation:
Aluminum Company of America, Alcoa Center, Pa., 15069

Extract

The thermo-mechanical response of single crystals has been studied in detail since the discovery of X-ray and electron diffraction. While an extensive knowledge exists on the effect of crystallographic orientation on deformation and recrystallization behavior of single crystals, the thermo-mechanical response of grains of different orientations embedded in a polycrystalline matrix are not well understood. With the emergence of microstructure based models predicting the structure evolution during deformation or recrystallization, data validating the predicted structure changes are essential. This requires to study the evolution of microstructural attributes such as morphology or orientation of an individual grain within a specific grain neighborhood during mechanical or thermal exposure. Interrupted coupon scale testing, with a separation of testing and microstructural observation is not sufficient due to the small size of the objects to be observed. Thus, the structure evolution of selected grains has to be followed in-situ.

Type
Materials Science Applications of Microdiffraction Methods in the Sem
Copyright
Copyright © Microscopy Society of America 1997

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References

Becker, R., Modeling Simul. Mater. Sci. Eng., Vol. 3 (1995), 417–4310.1088/0965-0393/3/4/001CrossRefGoogle Scholar
Humphreys, F.J., Scripta Met., 27 (1992), 1557156210.1016/0956-716X(92)90144-4CrossRefGoogle Scholar
Weiland, H., Field, D.P., Adams, B.L., Proc. Microscopy and Microanalysis 1995, eds. Bailey, G.W.et al., Jones and Begell Publishing, New York, 1995, p. 246247Google Scholar
Weiland, H., Field, D.P., and Adams, B.L., Proc. 11th Intern. Conf. on Textures of Materials (IOCTOM 11), Xi’an, China 1996, Eds.: Liang, Z., Zuo, L., and Chu, Y., International Academic Publishers, Beijing, China, pp. 14141419Google Scholar
Tong, W., Hector, L.G. Jr., Weiland, H. and Wieserman, L.F., submitted to Scripta Met.Google Scholar
Adams, B.L., Wright, S.I., and Kunze, K., Met. Trans., 24A, 819831.Google Scholar

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