Enhancing grain refinement efficiency and fading resistance of Al–B master alloys processed by equal channel angular pressing

2018 ◽  
Vol 33 (12) ◽  
pp. 1782-1788
Author(s):  
Kun Xia Wei ◽  
Yan Wei Zhang ◽  
Wei Wei ◽  
Xian Liu ◽  
Qing Bo Du ◽  
...  
Keyword(s):  
Grain Refinement ◽  
Equal Channel Angular Pressing ◽  
Angular Pressing ◽  
Refinement Efficiency ◽  
Master Alloys ◽  
Image Position

Abstract

scholarly journals Grain Refinement Efficiency in Commercial-Purity Aluminum Influenced by the Addition of Al-4Ti Master Alloys with Varying TiAl3 Particles

Materials ◽  
2016 ◽  
Vol 9 (11) ◽  
pp. 869 ◽  
Author(s):  
Jianhua Zhao ◽  
Jiansheng He ◽  
Qi Tang ◽  
Tao Wang ◽  
Jing Chen
Keyword(s):  
Grain Refinement ◽  
Commercial Purity ◽  
Refinement Efficiency ◽  
Master Alloys ◽  
Commercial Purity Aluminum

Influence of Stacking Fault Energy on the Microstructures and Grain Refinement in the Cu-Al Alloys during Equal-Channel Angular Pressing

2010 ◽  
Vol 667-669 ◽  
pp. 379-384 ◽  
Author(s):  
X.H. An ◽  
Shi Ding Wu ◽  
Z.F. Zhang
Keyword(s):  
Grain Size ◽  
Grain Refinement ◽  
Equal Channel Angular Pressing ◽  
Al Alloys ◽  
Stacking Fault ◽  
High Recovery ◽  
Angular Pressing ◽  
High Recovery Rate ◽  
Refinement Mechanism ◽  
Stacking Fault Energies

The microstructural evolution and grain refinement of Cu-Al alloys with different stacking fault energies (SFEs) processed by equal-channel angular pressing (ECAP) were investigated. The grain refinement mechanism was gradually transformed from dislocation subdivision to twin fragmentation with tailoring the SFE of Cu-Al alloys. Concurrent with the transition of grain refinement mechanism, the grain size can be refined into from ultrafine region (1 m~100 nm) to the nanoscale (<100 nm) and then it is found that the minimum equilibrium grain size decreases in a roughly linear way with lowering the SFE. Moreover, in combination with the previous results, it is proposed that the formation of a uniform ultrafine microstructure can be formed more readily in the materials with high SFE due to their high recovery rate of dislocations and in the materials with low SFE due to the easy formation of a homogeneously-twinned microstructure.

scholarly journals Designing (Ultra)Fine-Grained High-Entropy Alloys by Spark Plasma Sintering and Equal-Channel Angular Pressing

Crystals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1157
Author(s):  
Lisa-Marie Rymer ◽  
Thomas Lindner ◽  
Philipp Frint ◽  
Martin Löbel ◽  
Thomas Lampke
Keyword(s):  
Tensile Strength ◽  
Grain Refinement ◽  
Spark Plasma Sintering ◽  
Equal Channel Angular Pressing ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Fine Grained ◽  
Angular Pressing ◽  
Plasma Sintering ◽  
Spark Plasma

Single-phase, face-centered cubic (FCC) high-entropy alloys (HEA) are promising materials for future applications. In order to improve the mechanical properties, especially the tensile strength of these materials, this study focuses on the combination of spark plasma sintering (SPS) and equal-channel angular pressing (ECAP). The initial fine-grained microstructure produced by SPS is further refined by ECAP in a 90°-die. Optical microscopy and electron backscatter diffraction (EBSD) confirm this considerable grain refinement, leads to a grain size below 1 µm after 1 ECAP pass. An alternating arrangement of fine-grained areas and much coarser regions, aligned under an angle of approximately 27°, is found. Moreover, a first microstructural investigation of the twin structure is conducted. The mechanical behavior was investigated by hardness measurements and tensile testing. Both the hardness and tensile strength are remarkably increased after ECAP. In contrast, the uniform elongation and elongation at fracture are significantly reduced due to the strengthening mechanisms of strain hardening and grain refinement. It is concluded that the combination of SPS and ECAP is an attractive approach for designing (ultra)fine-grained HEAs with superior properties. The investigated techniques could be applied to understand the underlying microstructural mechanisms.

Tribological and corrosion properties of AM70 magnesium alloy processed by equal channel angular pressing

2017 ◽  
Vol 32 (11) ◽  
pp. 2153-2160 ◽  
Author(s):  
Karekere Rangaraju Gopi ◽  
Hanumanthappa Shivananda Nayaka
Keyword(s):  
Magnesium Alloy ◽  
Equal Channel Angular Pressing ◽  
Corrosion Properties ◽  
Angular Pressing ◽  
Image Position

Abstract

Grain refinement and mechanical properties of low-carbon steel by means of equal channel angular pressing and annealing

2013 ◽  
Vol 104 (5) ◽  
pp. 457-461 ◽  
Author(s):  
Galina G. Mayer ◽  
Elena G. Astafurova ◽  
Hans J. Maier ◽  
Eugene V. Naydenkin ◽  
George I. Raab ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Grain Refinement ◽  
Equal Channel Angular Pressing ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Angular Pressing
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