NDLI: Retrogression characteristics of a novel Al-Cu-Li-X alloy

Content Provider	Springer Nature Link
Author	Yuan, Zhi shan Lu, Zheng Wu, Xiu liang Xie, You hua Dai, Sheng long Li, Chang sheng
Copyright Year	2010
Abstract	Retrogression characteristics of a novel Al-Cu-Li-X alloy of 2A97 were studied by hardness testing, transmission electron microscopy (TEM), and differential scanning calorimetry (DSC). The retrogression treatments of aging at 155°C for 12 h followed by aging at 220 and 240°C were chosen by determining the peak temperature of δ′ precipitation at 230°C by DSC. The retrogression treatment at a lower temperature of 220°C causes the precipitation and coarsening of δ′ and θ′ phases in the matrix, resulting in an increase in hardness. Retrogression at a higher temperature of 240°C causes the dissolution and coarsening of δ′ and θ′ precipitates in the matrix and on the grain boundaries, resulting in a decrease in hardness. Microstructural changes upon retrogression including the appearance of equilibrium precipitates such as T$_{1}$, T$_{2}$, δ′, and θ are confirmed by the selected area electron diffraction and the bright and dark field image analysis.
Starting Page	624
Ending Page	628
Page Count	5
File Format	PDF
ISSN	16744799
Journal	International Journal of Minerals, Metallurgy, and Materials
Volume Number	17
Issue Number	5
e-ISSN	1869103X
Language	English
Publisher	University of Science and Technology Beijing
Publisher Date	2010-10-09
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	retrogression artificial aging aluminum-lithium alloy microstructure Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films Ceramics, Glass, Composites, Natural Methods Characterization and Evaluation of Materials Metallic Materials Materials Science
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Geochemistry and Petrology Mechanical Engineering

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