Determining the optimal stacking fault energy for achieving high ductility in ultrafine-grained Cu–Zn alloys

The evolution of the microstructure during processing by equal-channel angular pressing (ECAP) in silver having extremely low stacking fault energy was studied up to 16 passes. It was shown that at high strains the contribution of twinning to deformation increased at the expense of dislocation-controlled processes. It was also found that during storage at room temperature (i.e. at the temperature of ECAP) there was a self-annealing of the severely deformed microstructure after 1 month and its degree was revealed to have a strong dependence on the number of passes.

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Influence of stacking fault energy on deformation mechanism and dislocation storage capacity in ultrafine-grained materials

Scripta Materialia ◽

10.1016/j.scriptamat.2008.08.032 ◽

2009 ◽

Vol 60 (1) ◽

pp. 52-55 ◽

Cited By ~ 109

Author(s):

Z.W. Wang ◽

Y.B. Wang ◽

X.Z. Liao ◽

Y.H. Zhao ◽

E.J. Lavernia ◽

...

Keyword(s):

Deformation Mechanism ◽

Storage Capacity ◽

Stacking Fault ◽

Stacking Fault Energy ◽

Ultrafine Grained ◽

Ultrafine Grained Materials

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The Effect of Annealing on Nanostructured Copper Alloys

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.581-582.606 ◽

2012 ◽

Vol 581-582 ◽

pp. 606-610

Author(s):

Ying Shi Ren ◽

Yu Lan Gong ◽

Xiao Xiang Wu ◽

Yan Long ◽

Lian Ping Cheng ◽

...

Keyword(s):

Liquid Nitrogen ◽

Copper Alloys ◽

Annealing Treatment ◽

Stacking Fault ◽

Stacking Fault Energy ◽

Different Temperatures ◽

Zn Alloys ◽

Nanostructured Copper

Cu-12.1 at.% Al-4.1 at.% Zn alloys with stacking fault energy (SFE) of 7 mJ/m2 were rolled in liquid nitrogen. Further annealing treatment has been conducted to the cryorolled samples at different temperatures. Compared to cryorolled samples, it is found that the microhardness of the annealed ones has increased at the temperature of 200°C. The reason for the hardening phenomenon is briefly discussed in the paper.

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The Relationship between Mg Content and Extra-Hardening in Ultrafine Grained Al-Mg Alloy by SPD

Materials Science Forum ◽

10.4028/www.scientific.net/msf.941.1173 ◽

2018 ◽

Vol 941 ◽

pp. 1173-1177

Author(s):

Yuto Suzuki ◽

Yuichi Shiono ◽

Taiki Morishige ◽

Toshihide Takenaka

Keyword(s):

Plastic Deformation ◽

Severe Plastic Deformation ◽

Work Hardening ◽

Stacking Fault ◽

Stacking Fault Energy ◽

Mg Alloy ◽

Al Alloy ◽

Ultrafine Grained ◽

Mg Content ◽

The Relationship

Severe Plastic Deformation (SPD) process is one of methods for obtaining UFG-Al. It was reported in SPD-processed Al alloy that the extra-hardening due to work hardening caused by accumulated dislocation in the grains. In Al-Mg alloy, Mg decreases the stacking fault energy in this alloy, and dislocation tends to accumulate in the grains. In this study, Al-Mg alloy with various Mg contents were processed by Equal-Channel Angular Pressed (ECAP) which was one of SPD and annealed after processed ECAP. The relationship between Mg content and magnitude of extra-hardening was investigated. In ECAPed Al-3mass%Mg alloy, it was thought that extra-hardening was caused. Magnitude of extra-hardening was increased with increasing Mg content.

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