Gary Was

Professor

gsw@umich.edu

1921 Cooley

T: (734) 763-4675

Bio

Projects

Publications

Facilities

Group


Research Facilities

High Temperature Corrosion Laboratory (HTCL)
Location: Cooley Building

 

The High Temperature Corrosion Laboratory (HTCL) provides the capability to conduct corrosion, stress corrosion cracking, and hydrogen embrittlement tests in high temperature aqueous environments and, in particular, simulated light water reactor environments.  The corrosion laboratory has unique facilities for conducting both high and low temperature corrosion, stress corrosion cracking (SCC), electrochemical testing and mechanical testing.  The HTCL consists of five refreshed autoclave systems (titanium or stainless steel construction), two mounted in constant extension rate machines and two in constant load machines, plus two static autoclaves (titanium construction) and a high temperature (550C) steam CERT system.  A single-sample supercritical water CERT system and a multi-sample CERT system with crack growth rate capabilities are operational.  A third SCW system designed for testing neutron irradiated materials in a hot cell is under fabrication.  Each autoclave system is isolated from the other systems with independent water and computer monitoring systems.  The lab also contains two full-featured corrosion measurement systems and two additional potentiostats.  SCC testing in both simulated PWR and BWR is possible.

The High Temperature Corrosion Laboratory (HTCL) provides the capability to conduct corrosion, stress corrosion cracking, and hydrogen embrittlement tests in high temperature aqueous environments and, in particular, simulated light water reactor environments.  The corrosion laboratory has unique facilities for conducting both high and low temperature corrosion, stress corrosion cracking (SCC), electrochemical testing and mechanical testing.  The HTCL consists of five refreshed autoclave systems (titanium or stainless steel construction), two mounted in constant extension rate machines and two in constant load machines, plus two static autoclaves (titanium construction) and a high temperature (550C) steam CERT system.  A single-sample supercritical water CERT system and a multi-sample CERT system with crack growth rate capabilities are operational.  A third SCW system designed for testing neutron irradiated materials in a hot cell is under fabrication.  Each autoclave system is isolated from the other systems with independent water and computer monitoring systems.  The lab also contains two full-featured corrosion measurement systems and two additional potentiostats.  SCC testing in both simulated PWR and BWR is possible.  

 

Irradiated Materials Testing Laboratory
Location: 1059, PML

The Irradiated Materials Testing Laboratory provides the capability to conduct high temperature corrosion and stress corrosion cracking of neutron irradiated materials and to characterize the fracture surfaces after failure.  The laboratory consists of a high temperature autoclave, circulating water loop, load frame and servo motor for conducting constant extension rate tensile (CERT) and crack growth rate (CRG) tests in subcritical or supercritical water up to 600°C.  A scanning electron microscope (SEM) is also available for the analysis of fracture surfaces for sample fratured in either CERT or CGR modes in the autoclave system.  Both the autoclave system and the SEM are mobile and may be used in either the hot cell or the accompanying laboratory.

Materials Preparation Laboratory
Location: 1044, PML

The Materials Preparation Laboratory provides facilities for the preparation and characterization of materials for materials research studies.  The lab houses a grinding and polishing table for metallographic sample preparation, a tube furnace for annealing znd heat treating, an electropolishing and etching system, a jet-electropoisher for making TEM disc samples, a slow speed cut-off wheel, a slurry drill, and a microscope and camera for imaging sample surfaces.

Controlled-Impurity Helium Flow System
Location: 1038 Gerstacker

Figure shows the controlled-impurity helium flow system facility used to study the corrosion behavior of Ni-based superalloys in impure helium at temperatures up to 1000° C. It consists of a 3-zone tube furnace housing 7 quartz tubes, each of which can be supplied with a different gas mixture. Gas mixtures with controlled concentration levels of different gases are obtained by using premixed helium gas bottles and set of mass flow controllers. A discharge ionization detector gas chromatograph is used to analyze the gas mixture entering and exiting out of the furnace.

Michigan Ion Beam Laboratory
Location: Naval Architecture and Marine Engineering Building

 

http://www.engin.umich.edu/dept/nuclear/research/Mibl/index.html
The 1.7 MV Tandetron accelerator facility in the Michigan Ion Beam Laboratory (MIBL) has been developed specifically for proton irradiation and surface analysis experiments.  For proton-irradiations, the accelerator operates with a state-of-the art TORVIS ion source from National Electrostatics Corporation (NEC).  Up to 100 microA of proton current can be transmitted to the target end through the 15° beamline.  This is well beyond the value needed to conduct high dose rate and high dose irradiations.  The facility also provides a special sample stage for irradiation under carefully controlled conditions. Irradiations parameters such as dose, dost-rate, and temperature are computer-monitored.  The entire irradiated sample area is monitored continuously with a 50 um resolution using a high precision thermal imager (the Stinger by IRCON), providing unprecedented capability to verify irradiation temperature everywhere on the samples throughout the irradiation.  The 30° beamline is used for ion beam analysis and contains an aperture system for ion channeling. The analysis chamber is turbopumped and equipped for rapid sample turnaround. It contains a two-axis goniometer and detectors for backscattering and glancing angle measurements. Rutherford backscattering spectrometry (RBS), nuclear reaction analysis (NRA) elastic recoil detection (ERD) and ion channeling are conducted in this chamber.
The laboratory is also equipped with an Ion Beam Assisted Deposition System (IBAD).  IBAD is a combined process in which a film formed on a substrate is bombarded simultaneously with a directed beam of energetic ions. Ion energy, angle and ion-to-atom arrival rate ratio can be precisely controlled. Energetic ions can be used to modify film density, stress, texture, grain size, structure of the interface and other related properties.  The chamber is crypumped with two CTI 8 cryopumps that could provide vacuum in the 10-9 torr and even 10-10 torr range.
Other pieces of equipment in the lab that assist researchers in their work, are: a hardness indenter that is computer controlled with the capability of automatic measurements, a vacuum furnace that provides heat treating and annealing capability and a Profilometer for thin films measurements.
MIBL is in the process to be equipped with a new state-of-the-art 400 KV implanter.  This is a hybrid system built by NEC with a source provided by Danfysik.  It has the capability to produce a beam with any element in the periodic table of elements and with energies between 20 – 400 KV.