Nondestructive detection and measurement of hydrogen embrittlement
- Layton, UT
- Salt Lake City, UT
A nondestructive system and method for the determination of the presence and extent of hydrogen embrittlement in metals, alloys, and other crystalline structures subject thereto. Positron annihilation characteristics of the positron-electron annihilation within the tested material provide unique energy distribution curves for each type of material tested at each respective stage of hydrogen embrittlement. Gamma radiation resulting from such annihilation events is detected and statistically summarized by appropriate instrumentation to reveal the variations of electron activity within the tested material caused by hydrogen embrittlement therein. Such data from controlled tests provides a direct indication of the relative stages of hydrogen embrittlement in the form of unique energy distribution curves which may be utilized as calibration curves for future comparison with field tests to give on-site indication of progressive stages of hydrogen embrittlement.
- DOE Contract Number:
- E(11-1)-2128
- Assignee:
- University of Utah (Salt Lake City, UT)
- Patent Number(s):
- US 4064438
- OSTI ID:
- 862977
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
detection
measurement
hydrogen
embrittlement
method
determination
presence
extent
metals
alloys
crystalline
structures
subject
thereto
positron
annihilation
characteristics
positron-electron
tested
material
provide
unique
energy
distribution
curves
type
respective
stage
gamma
radiation
resulting
events
detected
statistically
summarized
appropriate
instrumentation
reveal
variations
electron
activity
caused
therein
data
controlled
tests
provides
direct
indication
relative
stages
form
utilized
calibration
future
comparison
field
on-site
progressive
calibration curve
crystalline structures
hydrogen embrittlement
gamma radiation
energy distribution
crystalline structure
calibration curves
positron annihilation
nondestructive detection
line structure
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