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Journal of Materials Engineering and Performance
Published in: Journal of Materials Engineering and Performance 5/2020

13-05-2020

Microstructure and Mechanical Properties of AA7075 Alloy with Laser High-Temperature Pre-precipitation Process

Authors: Kaining Wang, Ruiming Su, Siyi Ma, Yingdong Qu, Rongde Li

Published in: Journal of Materials Engineering and Performance | Issue 5/2020

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Abstract

The effect of laser high-temperature pre-precipitation on the microstructure and mechanical properties of the AA7075 alloy was studied comprehensively. Laser high-temperature pre-precipitation method was a promising alternative to the traditional high-temperature pre-precipitation method. The microstructure of the alloy was analyzed by transmission electron microscopy. By comparing the results of the hardness, tensile, and wear tests, the best mechanical properties of the alloy were obtained after treated with the 1000 W laser. More meta-stable η′ phases were formed in the matrix, in which the precipitates were dispersed. As for the mechanism, the interaction between dislocations and precipitates in the matrix changed from cutting mechanism to Orowan mechanism.
previous article Investigation of Tribological and Corrosion Behavior of Cu-Ti Alloy Processed by Multiaxial Cryoforging
next article Wear-Resistant Carbon-Fiber-Reinforced Ti-Based Composite Obtained by Laser Metal Deposition

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Metadata
Title
Microstructure and Mechanical Properties of AA7075 Alloy with Laser High-Temperature Pre-precipitation Process
Authors
Kaining Wang
Ruiming Su
Siyi Ma
Yingdong Qu
Rongde Li
Publication date
13-05-2020
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 5/2020
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-020-04832-8

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