Autoclave Upgrade for Corrosion Fatigue Testing

The objective of this project is to expand the University of Idaho’s current fatigue testing capabilities to include an autoclave load frame for use in fatigue testing of materials with a focus in metals to be used in nuclear power plants.

=Problem Definition=

Background
The objective of this project is to expand the University of Idaho’s current fatigue testing capabilities to include an autoclave load frame for use in fatigue testing of materials with a focus in metals to be used in nuclear power plants. Currently, no system is on hand to accomplish the fatigue testing desired by Dr. Stephens.

Deliverables
The scope of this project includes designing/purchasing all of the components for the fatigue testing apparatus, assembling it, and testing it for proper usability as defined in the following deliverables.

Initial Client Meeting & Expectations
The initial client meeting was conducted on June 14th, 2018. Dr. Stephens and Nicholas Schaber prepared the following list of "Primary Objectives" for the project.
 * Load Frame Upgrades
 * Loading system (motor/drive/gearbox, rated to &asymp;10 kips)
 * Load cell (coinciding with applied loads)
 * Load cell calibrated in line with seal
 * Load train displacement measurement (LVDT)
 * Extension rates up to 0.05 mm/s
 * Lid lifting/holding device
 * Load Control and Measurement
 * Feedback control loop (load controlled)
 * User interface for load frame
 * Programmable loading waveforms including:
 * Variable strain rate
 * Fatigue (cyclic loading, variable frequencies)
 * Creep-fatigue (variable hold time and set loading)
 * Constant load
 * Crack measurement/monitoring (DCPD)
 * User interface over/under warnings (temp, pressure, load)
 * Autoclave Upgrades
 * High temperature/pressure dynamic seal
 * Lid modifications
 * Loading rod
 * Internal load support
 * Isolated through-lid fittings for DCPD wires
 * Operating temperature of 400&deg;C (&asymp;750&deg;F)
 * Operating pressure of 20MPa (&asymp;3000psi)

Specifications
Acronyms used in this text:
 * UI:  User Interface
 * LVDT: Linear Variable Differential Transformer
 * DCPD: Direct Current Potential Drop

=Design Considerations=

=Project Learning=

=Final Design=

=Validation=

=Team Members=

=Additional Documentation=

Project Schedule



Meeting Minutes

File:2018 AutoclaveExperts MeetingMinutes.pdf

Presentations



Client Interview



Acronyms