SUMMARY

Many advances have been made during the period 1960–1985 in our understanding of the relations between microstructure and properties of materials. Theories of simple defect configurations have been developed, and new tools have emerged to view defects at the near-atomic scale. Qualitative guidelines for designing alloys apply to some of the new alloys produced by rapid solidification. Yet, our understanding is incomplete. Elastic fields, structures, and mechanisms in dislocation cores or crack tips represent unsolved problems. Statistical averaging methods are needed to make the connection between crystal plasticity and continuum plasticity.

ACKNOWLEDGMENTS

The support of this work by the National Science Foundation under grant DMR 8311620 is gratefully acknowledged. The author is pleased to acknowledge the helpful comments and discussions of A.S.Argon, M.Cohen, J.W.Hutchinson, W.D.Nix, and J.R.Rice.

NOTES

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