Chapter 44. Shear Induced Transformation in Enstatite
- John B. Wachtman Jr.
Published Online: 26 MAR 2008
Copyright © 1996 The American Ceramic Society
Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3
How to Cite
Zhu, D. and Kriven, W. M. (1996) Shear Induced Transformation in Enstatite, in Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 17, Issue 3 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314821.ch44
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1996
Print ISBN: 9780470375426
Online ISBN: 9780470314821
Shear-induced proto to clino transformation in enstatite is studied using a novel shear-compression experiment. The transformation can be critically induced by shear stress at 96 MPa which is independent of stress state, but sensitive to microstructure. Considerable non-linear stress vs strain behavior is observed in the shear compression test, where the “plasticity” results from transformation and depends on either microstructure or mechanical testing conditions. XRD on fracture surfaces confirms that transformation is induced by shear stress, and indicates that the amount of clinoenstatite produced is a function of stress state. Thus, the more compressive the stress, the higher the ultimate shear stress and the more the amount of transformed clinoenstatite.