"The premartensitic temperature dependence of ultrasonic wave propagation in Fe-30 pct Ni polycrystals and Fe-32 pct Ni single crystals was measured by using a continuous wave technique. As the temperature was lowered to within 10°C of the Ms, a nonlinear decrease of the relative shear velocity was observed. This effect is related to dislocation stacking fault instabilities which may trigger the martensitic phase transformation. In addition, the single crystals show a frequency dependence of the shear elastic constant C' well above the Ms. The dispersion is believed to be caused by fluctuations in the anisotropic molecular field which precede the magnetic transformation which occurs with the formation of martensite"--Abstract, page iii.
Clark, J. B. (J. Beverley)
Weart, H. W. (Harry Waldron), 1927-
Tefft, Wayne E., 1929-1973
Sorrell, Charles A.
Materials Science and Engineering
Ph. D. in Metallurgical Engineering
U. S. Atomic Energy Commission
American Iron and Steel Institute
University of Missouri--Rolla
vii, 28 pages
© 1973 Bryce Linn Shriver, All rights reserved.
Dissertation - Restricted Access
Library of Congress Subject Headings
Strains and stresses
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Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.http://laurel.lso.missouri.edu/record=b1066876~S5
Shriver, Bryce Linn, "Premartensitic elasticity of Fe-Ni Invars" (1973). Doctoral Dissertations. 253.
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