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Displaying 43551 - 43575 of 74220

Control of Intrinsic Instability of Superelastic Deformation

January 1, 2002
Author(s)
Julia Slutsker, Alexander L. Roytburd
The superelastic deformation of shape memory alloys has intrinsic instability as a result of incompatibility between martensite and austenite phases at stress-induced transformation. The instability leads to the stress-strain hysteresis of the superelastic

Crack Growth in Sapphire

January 1, 2002
Author(s)
Sheldon M. Wiederhorn, Ralph Krause
Crack growth was studied in sapphire on both the m-plane and the r-plane (rhombohedral twin plane). Crack growth on the m-plane fit a power law function of stress intensity factor and an Arrhenius function of temperature. Crack growth on r-plane double

Damage Testing of Partial Reflectors for 157 nm Laser Calorimeters

January 1, 2002
Author(s)
Holger Laabs, Richard D. Jones, Christopher L. Cromer, Marla L. Dowell, V. Liberman
We determined the damage thresholds and lifetimes of several materials using 157 and 193 nm excimer lasers and a beam profile technique similar to that described in ISO 11254-2. We made these measurements to select an appropriate absorbing material for use
Displaying 43551 - 43575 of 74220