scholarly journals Effect of stacking fault energy on the restoration mechanisms and mechanical properties of friction stir welded copper alloys

2019 ◽  
Vol 162 ◽  
pp. 185-197 ◽  
Author(s):  
Akbar Heidarzadeh ◽  
Tohid Saeid ◽  
Volker Klemm ◽  
Ali Chabok ◽  
Yutao Pei
Keyword(s):  
Mechanical Properties ◽  
Copper Alloys ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Friction Stir

Structural features and strength behavior of TRIP/TWIP steels

2020 ◽  
pp. 5-18
Author(s):  
D. V. Prosvirnin ◽  
◽  
M. S. Larionov ◽  
S. V. Pivovarchik ◽  
A. G. Kolmakov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Thermomechanical Processing ◽  
Maximum Load ◽  
Structural Features ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Structural And Functional Properties ◽  
Twip Steels ◽  
The Creation

A review of the literature data on the structural features of TRIP / TWIP steels, their relationship with mechanical properties and the relationship of strength parameters under static and cyclic loading was carried out. It is shown that the level of mechanical properties of such steels is determined by the chemical composition and processing technology (thermal and thermomechanical processing, hot and cold pressure treatment), aimed at achieving a favorable phase composition. At the atomic level, the most important factor is stacking fault energy, the level of which will be decisive in the formation of austenite twins and / or the formation of strain martensite. By selecting the chemical composition, it is possible to set the stacking fault energy corresponding to the necessary mechanical characteristics. In the case of cyclic loads, an important role is played by the strain rate and the maximum load during testing. So at high loading rates and a load approaching the yield strength under tension, the intensity of the twinning processes and the formation of martensite increases. It is shown that one of the relevant ways to further increase of the structural and functional properties of TRIP and TWIP steels is the creation of composite materials on their basis. At present, surface modification and coating, especially by ion-vacuum methods, can be considered the most promising direction for the creation of such composites.

Effect of stacking fault energy on deformation behavior of cryo-rolled copper and copper alloys

2011 ◽  
Vol 529 ◽  
pp. 230-236 ◽  
Author(s):  
H. Bahmanpour ◽  
A. Kauffmann ◽  
M.S. Khoshkhoo ◽  
K.M. Youssef ◽  
S. Mula ◽  
...  
Keyword(s):  
Deformation Behavior ◽  
Copper Alloys ◽  
Stacking Fault ◽  
Stacking Fault Energy

Evaluation of Mechanical Properties and Finite Element Modeling in Friction Stir Welding of C12200 Copper Alloy to C36000 High-Leaded Brass Pipe

2020 ◽  
Vol 38 (8A) ◽  
pp. 1106-1116
Author(s):  
Ahmed A. Akber ◽  
Ali A. Khleif ◽  
Abbas N. Hasein
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Friction Stir Welding ◽  
Finite Element Modeling ◽  
Copper Alloy ◽  
Rotation Speed ◽  
Copper Alloys ◽  
Friction Stir ◽  
Element Modeling ◽  
Zero Degree

In systems transporting fluids like petrol, water, or any fluids. Copper and brass pipes are used because of the capability to resist corrosion. The copper alloys can be welded by several methods like arc, resistance, friction welding, and gas methods and they can be readily soldered and brazed. In the present study, mechanical properties and finite element modeling evaluation for friction stir welding of two dissimilar pipes (C12200 copper alloy pipe with C36000 copper alloy pipe). During this study six parameters were used where rotation speed of (775,1000,1300 and1525rpm), welding speed of 1.7 mm/min, axial force of 8.5KN, with a CW direction of rotation, and zero degree of tilt angle, using a threaded cone geometry of the tool. The results showed that the best weld quality was in case when the speed of rotation was 1525 rpm. 

The Effect of Annealing on Nanostructured Copper Alloys

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.

scholarly journals Modeling of Stacking Fault Energy in Hexagonal-Close-Packed Metals

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Zhigang Ding ◽  
Shuang Li ◽  
Wei Liu ◽  
Yonghao Zhao
Keyword(s):  
Mechanical Properties ◽  
Ising Model ◽  
Theoretical Background ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Hexagonal Close Packed ◽  
Orientation Model ◽  
Generalized Stacking Fault ◽  
Supercell Model ◽  
Stacking Fault Energies

The deformation of metals is known to be largely affected by their stacking fault energies (SFEs). In the review, we examine the theoretical background of three normally used models, supercell model, Ising model, and bond orientation model, for the calculation of SFE of hexagonal-close-packed (hcp) metals and their alloys. To predict the nature of slip in nanocrystalline metals, we further review the generalized stacking fault (GSF) energy curves in hcp metals and alloys. We conclude by discussing the outstanding challenges in the modeling of SFE and GSF energy for studying the mechanical properties of metals.

Effects of solute concentration on the stacking fault energy in copper alloys at finite temperatures

2017 ◽  
Vol 726 ◽  
pp. 601-607 ◽  
Author(s):  
Q.Q. Shao ◽  
L.H. Liu ◽  
T.W. Fan ◽  
D.W. Yuan ◽  
J.H. Chen
Keyword(s):  
Copper Alloys ◽  
Solute Concentration ◽  
Stacking Fault ◽  
Stacking Fault Energy
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