NDLI: Microstructural Evolution and Softening Behavior of Simulated Heat-Affected Zone in 2219 Aluminum Alloy

Content Provider	Springer Nature Link
Author	Chen, Cui Xin Xie, Hui Juan Wang, Dong Po Di, Xin Jie Deng, Cai Yan
Copyright Year	2017
Abstract	The effect of peak temperature (T $_{p}$) at 200, 300, 400, 500 and 550 °C on the microstructural evolution and softening behavior of the simulated heat-affected zone (HAZ) was studied in the 2219-T87 alloy by electron-backscatter diffraction, transmission electron microscopy, X-ray diffraction, micro-hardness and micro-tensile tests. The results showed that the grain size in the HAZs at 200–500 °C was comparable, but the number density of the strengthening precipitates (GP zones/θ′) decreased with increasing T $_{p}$. At a T $_{p}$ of 550 °C, the grain size significantly decreased and the distribution of the misorientation angles corresponded to the MacKenzie distribution. The GP zones/θ′ phase coarsened and translated into θ phases at T $_{p}$ values in the range of 200–400 °C. Increasing the T $_{p}$ to 500 °C and above, some θ′ phases translated into θ phases and others dissolved into the α-Al matrix which led to an increase in the solid solution strengthening. The reduction of the number density of the GP zones/θ′ was responsible for the softening behavior.
Starting Page	1177
Ending Page	1184
Page Count	8
File Format	PDF
ISSN	10067191
Journal	Acta Metallurgica Sinica (English Letters)
Volume Number	30
Issue Number	12
e-ISSN	21941289
Language	English
Publisher	The Chinese Society for Metals
Publisher Date	2017-05-05
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Spectroscopy/Spectrometry Tribology, Corrosion and Coatings Softening behavior Organometallic Chemistry Peak temperature of thermal cycles Characterization and Evaluation of Materials Metallic Materials Precipitates 2219 aluminum alloy Electron-backscatter diffraction (EBSD) Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Metals and Alloys

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