4.7 Article

Hot deformation behavior of high Zn-containing 7A65 Al alloy

Journal

RARE METALS
Volume 42, Issue 1, Pages 302-312

Publisher

NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-022-02112-z

Keywords

7A65 Al alloy; Hot deformation behavior; Constitutive model; Processing map; Microstructure

Ask authors/readers for more resources

This study investigated the hot deformation behavior and microstructural evolution of as-homogenized 7A65 Al alloy under isothermal compression. It was found that the flow stress exhibited a typical dynamic recovery characteristic at high-temperature deformation conditions, and a constitutive equation was proposed to describe the flow behavior. The hot processing map was established, and the optimal processing conditions were determined. Deformation temperature and strain rate had a significant effect on the microstructure evolution, with the main softening mechanism being dynamic recovery, but dynamic recrystallization was enhanced with the increase in temperature.
Hot deformation behavior and microstructural evolution of as-homogenized 7A65 Al alloy under isothermal compression at temperatures of 573-713 K and strain rates of 0.1-10.0 s(-1) were investigated. It was found that the flow stress of 7A65 Al alloy exhibited a typical dynamic recovery characteristic at high-temperature deformation conditions, and a sixth-order polynomial strain compensated Arrhenius constitutive equation was proposed to describe the flow behavior. Based on the dynamic material model and the Prasad standard, the hot processing map was established. The optimal processing conditions were within the temperature range of 633-713 K and the strain rate range of 0.1-0.5 s(-1) when the true strain exceeded 0.6. Deformation temperature and strain rate had an obvious effect on the microstructure evolution of 7A65 Al alloy, and the deformed microstructures were mainly composed of deformed grains and recovery structure. The main softening mechanism was dynamic recovery at the temperature of 573-713 K and the strain rate of 0.1-10.0 s(-1), but dynamic recrystallization was enhanced with the increase in temperature.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available