A study on Al 2219 alloy precipitate growth rates by non-linear ultrasonic technique
-
Published:2020-11-01
Issue:11
Volume:62
Page:656-661
-
ISSN:1354-2575
-
Container-title:Insight - Non-Destructive Testing and Condition Monitoring
-
language:en
-
Short-container-title:insight
Author:
You Jun,Wu Yunxin,Gong Hai
Abstract
A non-linear ultrasonic study has been carried out to characterise the variation in precipitation phase. An age-hardenable aluminium alloy (2219) has been taken as a model alloy for the present investigation. It is shown that there is a strong correlation between the change in the non-linear
coefficient and the change in the precipitated phase. The observed variations in the non-linear ultrasonic parameter have been explained by modifying an existing dislocation-coherent precipitate interaction model for the generation of harmonics in order to account for a weaker dislocation-semicoherent
precipitate interaction. In general, the model proposed can be applicable to all precipitation-hardenable alloy systems undergoing coherent to incoherent precipitate phase transition.
Publisher
British Institute of Non-Destructive Testing (BINDT)
Subject
Materials Chemistry,Metals and Alloys,Mechanical Engineering,Mechanics of Materials