NDLI: Effect of Heat Treatment on Fracture Toughness of As-Forged AZ80 Magnesium Alloy

Content Provider	Springer Nature Link
Author	Deng, Min Li, Hui Zhong Tang, Si Nan Liao, Hui Juan Liang, Xiao Peng Liu, Ruo Mei
Copyright Year	2015
Abstract	The effect of heat treatment on the plane-strain fracture toughness in forged AZ80 magnesium alloy was studied. Two different kinds of heat treatment technologies (T5 and T6) were performed on the forged samples. The values of plane-strain fracture toughness (K $_{IC}$) were obtained from the stretched zone (SZ for short) analysis. The results showed that the as-forged specimen would produce a large quantity of β-Mg$_{17}$Al$_{12}$ precipitates both in the interior of the grains and at grain boundaries after T5 and T6 heat treatments. The β-Mg$_{17}$Al$_{12}$ displayed a precipitation strengthening. Compared with the as-forged specimen, the ultimate tensile strengths of T5 and T6 specimens were improved by 42.8 and 30 MPa, respectively. And the K $_{IC}$ of T5 and T6 specimens also increased to 23.8 and 21.0 MPa m$^{1/2}$ while that of the as-forged sample was 17.9 MPa m$^{1/2}$. The average grain size of T5 sample was similar to that of the as-forged one, but was finer than that of T6 specimen. The best mechanical properties and fracture toughness of forged AZ80 magnesium alloy were achieved after T5 treatment.
Starting Page	1953
Ending Page	1960
Page Count	8
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	24
Issue Number	5
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2015-03-31
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	AZ80 magnesium alloy fracture toughness heat treatment precipitates Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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