Document Detail


Thermo-acoustic fatigue characterization.
MedLine Citation:
PMID:  12159978     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The nondestructive detection of early fatigue damage states is of high importance for safety in aircraft, automobiles, railways, nuclear energy industries and chemical industries. Titanium alloys commonly used in aerospace for structures and engine components are subject to fatigue damage during service. In the current study fatigue damage progression in a titanium alloy (Ti-6Al-4V) was investigated using thermographic detection of the heat dissipated during short-term mechanical loading. The initial rate of temperature increase induced by the short-term mechanical loading was used to indicate the current microstructural state and presence of prior fatigue damage. Two methods for thermal excitation were investigated (a) high amplitude mechanical loading and (b) small amplitude ultrasonic loading. A formula that describes the temperature enhancement due to heat generation during one loading cycle is derived from high amplitude loading data. A correlation between the temperature increase during short-term ultrasonic loading and accumulated fatigue cycles is used to suggest a methodology for in-field assessment of fatigue condition.
Authors:
Norbert G H Meyendorf; Henrik Rösner; Victoria Kramb; Shamachary Sathish
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ultrasonics     Volume:  40     ISSN:  0041-624X     ISO Abbreviation:  Ultrasonics     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-08-05     Completed Date:  2002-08-23     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0050452     Medline TA:  Ultrasonics     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  427-34     Citation Subset:  -    
Affiliation:
meyendorf@udri.udayton.edu
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