Tailoring stacking fault energy for high ductility and high strength in ultrafine grained Cu and its alloy

2006 ◽  
Vol 89 (12) ◽  
pp. 121906 ◽  
Author(s):  
Y. H. Zhao ◽  
Y. T. Zhu ◽  
X. Z. Liao ◽  
Z. Horita ◽  
T. G. Langdon
Keyword(s):  
High Strength ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Ductility ◽  
Ultrafine Grained

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

2008 ◽  
Vol 493 (1-2) ◽  
pp. 123-129 ◽  
Author(s):  
Y.H. Zhao ◽  
X.Z. Liao ◽  
Z. Horita ◽  
T.G. Langdon ◽  
Y.T. Zhu
Keyword(s):  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Ductility ◽  
Ultrafine Grained ◽  
Zn Alloys

Simultaneous Improvement of Ductility and Strength by Minute Doping in Ultrafine Grained Au Wires-Experiment and First Principle Study

2008 ◽  
Vol 1086 ◽  
Author(s):  
Yeong Huey Effie Chew ◽  
Chee Cheong Wong ◽  
Cristiano Ferraris ◽  
Hui Hui Kim
Keyword(s):  
High Strength ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
First Principle ◽  
Fine Grained ◽  
Preferential Segregation ◽  
Ultrafine Grained ◽  
Calcium Doping ◽  
Gold Wires ◽  
Strength And Ductility

AbstractAchieving both high strength and ductility is a common goal in the design of fine-grained materials. Here we report that with only ppm level of calcium doping, ductility and strength in ultrafine-grained gold wires can be concurrently improved by 108% and 65% respectively. Preferential segregation of calcium to stacking faults and grain boundaries in gold has reduced stacking fault energy of the system effectively, as shown by TEM and first principle simulation study. Through the modification of stacking fault energy, one can simultaneously increases the strength and ductility of a system.

Unique Features of Ultrafine-Grained Microstructures in Materials Having Low Stacking Fault Energy

2010 ◽  
Vol 659 ◽  
pp. 171-176 ◽  
Author(s):  
Jenő Gubicza ◽  
Nguyen Q. Chinh ◽  
János L. Lábár ◽  
Zoltán Hegedűs ◽  
Terence G. Langdon
Keyword(s):  
Equal Channel Angular Pressing ◽  
Room Temperature ◽  
Strong Dependence ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Controlled Processes ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
Number Of Passes

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.

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

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.

The effect of impurity level on ultrafine-grained microstructures and their stability in low stacking fault energy silver

2011 ◽  
Vol 528 (29-30) ◽  
pp. 8694-8699 ◽  
Author(s):  
Zoltán Hegedűs ◽  
Jenő Gubicza ◽  
Megumi Kawasaki ◽  
Nguyen Q. Chinh ◽  
Zsolt Fogarassy ◽  
...  
Keyword(s):  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Impurity Level ◽  
Ultrafine Grained

Impact of nanodiffusion on the stacking fault energy in high-strength steels

2014 ◽  
Vol 75 ◽  
pp. 147-155 ◽  
Author(s):  
T. Hickel ◽  
S. Sandlöbes ◽  
R.K.W. Marceau ◽  
A. Dick ◽  
I. Bleskov ◽  
...  
Keyword(s):  
High Strength Steels ◽  
High Strength ◽  
Stacking Fault ◽  
Stacking Fault Energy

Ultrafine Grained High Strength Low Alloy Steel with High Strength and High Ductility

2010 ◽  
Vol 654-656 ◽  
pp. 238-241 ◽  
Author(s):  
Jie Shi ◽  
Wen Quan Cao ◽  
Han Dong
Keyword(s):  
Electron Microscopy ◽  
Alloy Steel ◽  
Volume Fraction ◽  
High Strength ◽  
Uniaxial Tensile ◽  
X Rays ◽  
High Ductility ◽  
Low Alloy Steel ◽  
Uniaxial Tensile Testing ◽  
Ultrafine Grained

In this study a C-Mn High Strength Low Alloy steel (HSLAs) was processed by quenching and austenite reverted transformation during annealing (ART-annealing), which results in an ultrafine grained duplex microstructure characterized by scanning electron microscopy equipped with electron back scattered diffraction, transmission electron microscopy and x-rays diffraction (SEM/EBSD, TEM and XRD). Microstructural observation revealed that the full hard martensitic microstucture gradually transformed into ultrafine grained duplex structure with austenite volume fraction up to 30% at specific annealing conditions. Mechanical properties of this processed steel measured by uniaxial tensile testing demonstrated that an excellent combination of strength (Rm~1GPa) and total elongation (A5~40%) at 30% metastable austenite condition in studied C-Mn-HSLAs. This substantially improved strength and ductility were attributed to the strain induced phase transformation of retained austenite dispersed throughout the ultrafine grained microstructure. At last it is proposed that ART-annealing is a promising way to produce high strength and high ductility steel products.

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