Hostname: page-component-77c89778f8-m8s7h Total loading time: 0 Render date: 2024-07-18T14:19:37.455Z Has data issue: false hasContentIssue false
  • English
  • Français

Comment on “Plastic deformation and fracture behavior of a Fe-modified Al3Ti-base L12 intermetallic alloy” [J. Mater. Res. 6, 957 (1991)]: The importance of specimen length-to-width ratios and end constraints in compression testing of brittle and semibrittle materials

Published online by Cambridge University Press:  31 January 2011

David H. Zeuch
David H. Zeuch
Affiliation:
Geomechanics Division 6232, Sandia National Laboratories, Albuquerque, New Mexico 87185
Get access

Abstract

Specimen length-to-diameter ratios and specimen/platen end conditions are important to interpretation of, and comparisons between, uniaxial compression tests on brittle materials. When differing l:d ratios and specimen/platen end conditions are used to test pressure-sensitive materials, observations may not be readily comparable owing to the different and nonuniform triaxial stress states. Specimens of brittle Fe- and Ni-modified Al3Ti intermetallic alloys having relatively low and different l:d ratios were tested in compression by Gengxiang et al. and Turner et al., respectively. Qualitative observations on the macroscopic deformation and failure modes (shear failure and distributed microcracking) indicate that the alloys are pressure-sensitive and that the results were possibly complicated in differing degrees by test configuration. Thus, direct comparison of these results with those obtained earlier for Al3Ti by Yamaguchi et al., who used a significantly greater l:d ratio, may not be altogether useful. Approaches to minimizing end effects are reviewed.

Type
Comments
Information
Journal of Materials Research , Volume 7 , Issue 7 , July 1992 , pp. 1956 - 1959
Copyright
Copyright © Materials Research Society 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Gengxiang, H., Shipu, C., Xiaohua, W., and Xiaofu, C., J. Mater. Res. 6, 957 (1991).CrossRefGoogle Scholar
2.Yamaguchi, M., Umakoshi, Y., and Yamane, T., Philos. Mag. 55A, 301 (1987).CrossRefGoogle Scholar
3.Turner, C. D., Powers, W. O., and Wert, J. A., Acta Metall. 37, 2635 (1989).CrossRefGoogle Scholar
4.Paterson, M. S., Experimental Rock Deformation: the Brittle Field (Springer-Verlag, New York, 1978), 254 pp.CrossRefGoogle Scholar
5.1990 Annual Book of ASTM Standards (American Society for Testing of Materials, Philadelphia, 1990), Vol. 04–08, p. 360.Google Scholar
6.1990 Annual Book of ASTM Standards (American Society for Testing of Materials, Philadelphia, 1990), Vol. 03–01, p. 161.Google Scholar
7.Evans, B., Fredrich, J. T., and Wong, T-F., in The Brittle-Ductile Transition in Rocks, edited by Duba, A. G., Durham, W. B., Handin, J. W., and Wang, H. F. (The American Geophysical Union, Washington, DC, 1990), p. 1.Google Scholar
8.Meredith, P. G., in Deformation Processes in Minerals, Ceramics and Rocks, edited by Barber, D. J. and Meredith, P. G. (Unwin Hyman, Boston, 1990), p. 5.CrossRefGoogle Scholar
9.Peng, S. D., Int. J. Rock Mech. Min. Sci. 8, 399 (1971).CrossRefGoogle Scholar
10.Peng, S. D. and Johnson, A. M., Int. J. Rock Mech. Min. Sci. 9, 37 (1972).CrossRefGoogle Scholar
11.Starfield, A. M. and Wawersik, W. R., in Basic and Applied Rock Mechanics: Proceedings of the Tenth U.S. Symposium on Rock Mechanics (Society of Mining Engineers of the AIME, 1972), p. 793.Google Scholar
12.Jaeger, J. C. and Cook, N. G. W., Fundamentals of Rock Mechanics (Chapman and Hall, London, 1976), 585 pp.Google Scholar
13.Branstetter, L. J. and Preece, D. S., in Rock Mechanics, Theory-Experiment-Practice: Proceedings of the Twenty-Fourth U.S. Symposium on Rock Mechanics (Association of Engineering Geologists, Short Hills, NJ, 1983), p. 37.Google Scholar
14.Wang, J-G. and Raj, R., J. Am. Ceram. Soc. 67, 399 (1984).CrossRefGoogle Scholar
15.Bampton, C. C. and Raj, R., Acta Metall. 30, 2043 (1982).CrossRefGoogle Scholar