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Title: Nondestructive detection and measurement of hydrogen embrittlement

Abstract

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.

Inventors:
 [1];  [2]
  1. Layton, UT
  2. Salt Lake City, UT
Issue Date:
OSTI Identifier:
862977
Patent Number(s):
4064438
Assignee:
University of Utah (Salt Lake City, UT)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
E(11-1)-2128
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
nondestructive; 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; /250/376/

Citation Formats

Alex, Franklin, and Byrne, Joseph Gerald. Nondestructive detection and measurement of hydrogen embrittlement. United States: N. p., 1977. Web.
Alex, Franklin, & Byrne, Joseph Gerald. Nondestructive detection and measurement of hydrogen embrittlement. United States.
Alex, Franklin, and Byrne, Joseph Gerald. Sat . "Nondestructive detection and measurement of hydrogen embrittlement". United States. https://www.osti.gov/servlets/purl/862977.
@article{osti_862977,
title = {Nondestructive detection and measurement of hydrogen embrittlement},
author = {Alex, Franklin and Byrne, Joseph Gerald},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {1}
}

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