The Effect of Multi-pass Equal-Channel Angular Pressing (ECAP) for Consolidation of Aluminum-Nano Alumina Composite Powder on Wear Resistance

2016 ◽  
Vol 25 (2) ◽  
pp. 687-696 ◽  
Author(s):  
Reza Derakhshandeh-Haghighi ◽  
Seyed Ahmad Jenabali Jahromi
Keyword(s):  
Wear Resistance ◽  
Equal Channel Angular Pressing ◽  
Composite Powder ◽  
Angular Pressing ◽  
Nano Alumina ◽  
Alumina Composite

scholarly journals Development of High-Performance SiCp/Al-Si Composites by Equal Channel Angular Pressing

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 738 ◽  
Author(s):  
Qiong Xu ◽  
Aibin Ma ◽  
Junjie Wang ◽  
Jiapeng Sun ◽  
Jinghua Jiang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Equal Channel Angular Pressing ◽  
High Performance ◽  
Adhesive Wear ◽  
Processing Route ◽  
Matrix Composites ◽  
New Approach ◽  
Angular Pressing ◽  
The Matrix ◽  
Industry Applications

Relatively low compactness and unsatisfactory uniformity of reinforced particles severely restrict the performance and widespread industry applications of the powder metallurgy (PM) metal matrix composites (MMCs). Here, we developed a combined processing route of PM and equal channel angular pressing (ECAP) to enhance the mechanical properties and wear resistance of the SiCp/Al-Si composite. The results indicate that ECAP significantly refined the matrix grains, eliminated pores and promoted the uniformity of the reinforcement particles. After 8p-ECAP, the SiCp/Al-Si composite consisted of ultrafine Al matrix grains (600 nm) modified by uniformly-dispersed Si and SiCp particles, and the composite relative density approached 100%. The hardness and wear resistance of the 8p-ECAP SiCp/Al-Si composite were markedly improved compared to the PM composite. More ECAP passes continued a trend of improvement for the wear resistance and hardness. Moreover, while abrasion and delamination dominated the wear of PM composites, less severe adhesive wear and fatigue mechanisms played more important roles in the wear of PM-ECAP composites. This study demonstrates a new approach to designing wear-resistant Al-MMCs and is readily applicable to other Al-MMCs.

Wear Mitigation in Magnesium Alloy AZ80 Processed by Equal Channel Angular Pressing

2011 ◽  
Vol 6 ◽  
pp. 1-11 ◽  
Author(s):  
Yasser Fouad ◽  
Khaled M. Ibrahim ◽  
Brando Okolo
Keyword(s):  
Wear Resistance ◽  
Magnesium Alloy ◽  
Equal Channel Angular Pressing ◽  
Wear Behavior ◽  
Wear Test ◽  
Aging Treatment ◽  
Angular Pressing ◽  
Pin On Disc ◽  
Set Up ◽  
Az80 Alloy

First results of the influence of Equal Channel Angular Pressing (ECAP) on the wear behavior of the magnesium alloy AZ80 have been discussed. The evident grain refinement and redistribution of second phases in the 4 pass processed materials resulted in an increase of the hardness state in the AZ80 alloy. Wear tests conducted on a pin-on-disc set-up revealed better wear resistance for the 4 pass processed materials. Isothermal aging treatment, at 210°C for 10 hrs, of the ECAP processed materials showed that wear resistance properties are improved markedly. For incremental sliding speeds during the wear test, wear rate of the AZ80 alloy was found to increase.

Densification of Al-Y2O3 composite powder by equal channel angular pressing

2010 ◽  
Vol 63 (5) ◽  
pp. 813-817 ◽  
Author(s):  
Ramu Yarra ◽  
P. Venkatachalam ◽  
S. Ramesh Kumar ◽  
B. Ravisankar ◽  
K. Jayasankar ◽  
...  
Keyword(s):  
Equal Channel Angular Pressing ◽  
Composite Powder ◽  
Angular Pressing

scholarly journals Features of the structure and properties formation of AMG6 alloy under the equal channel angular pressing

2020 ◽  
Vol 97 (1) ◽  
pp. 42-49
Author(s):  
B. Rakhadilov ◽  
◽  
L. Zhurerova ◽  
W. Wieleba ◽  
Zh. Sagdoldina ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Equal Channel Angular Pressing ◽  
Experimental Studies ◽  
Grain Structure ◽  
Amg6 Alloy ◽  
Alloy Amg6 ◽  
Optimal Method ◽  
Angular Pressing ◽  
Amg6 Aluminum Alloy

The results of experimental studies of changes in the structure, microhardness, and wear resistance of the AMG6 aluminum alloy during equal channel angular pressing (ECAP) are presented in this work. The evolution of the fine structure and the formation of secondary phases in the AMG6 alloy during ECAP were studied. The dark-field image of the structure of the AMg6 alloy in the matrix reflex showed the splitting of the material into small disoriented fragments of about 0.5 μm in size with a small-angle disorientation boundary (about 2–5°). Optimal method and modes of ECAP of the AMG6 aluminum alloy were selected of the bases of experimental research, which make it possible to obtain a workpiece with enhanced tribological and mechanical characteristics. It was established that the most intensive grinding of the grain structure in the AMG6 alloy occurs at ECAP-12 at a channel angle intersection of 120°. It is shown that with a decrease in grain size, the microhardness of the alloy AMG6 after ECAP increases by 4 times, compared with the initial state.The results of the test samples for abrasive wear showed a decrease in mass loss after 12 passes of ECAP, which indicates an increase in the wear resistance of the alloy AMG6 by 13–14 %, compared with the initial state.

Improving the Tribological Properties of Self-Lubricating Al-Sn Alloys by their Severe Plastic Processing

2013 ◽  
Vol 379 ◽  
pp. 110-114 ◽  
Author(s):  
N.M. Rusin ◽  
A.L. Skorentsev
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Equal Channel Angular Pressing ◽  
Tribological Properties ◽  
Structure And Properties ◽  
Angular Pressing ◽  
Plastic Processing ◽  
Interphase Boundaries ◽  
Sintered Alloys

The influence of equal channel angular pressing by route A on the structure and properties of sintered Al-40Sn alloys was investigated. It was founded that the microstructure of sintered alloys very strong correlated with the type of initial powders that, nevertheless, not affects on mechanical properties of sintered alloys. The sintered structure of alloys was transformed in the layered one, using the pressing. It results in the square of interphase boundaries enlarging that gives to Al-40Sn alloys some additional strengthening and wear resistance.

Wear resistance of an ultrafine-grained Cu-Zr alloy processed by equal-channel angular pressing

Wear ◽  
2015 ◽  
Vol 326-327 ◽  
pp. 10-19 ◽  
Author(s):  
Jianwei Li ◽  
Jittraporn Wongsa-Ngam ◽  
Jie Xu ◽  
Debin Shan ◽  
Bin Guo ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Equal Channel Angular Pressing ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
Zr Alloy

Room Temperature Consolidation of Al and B4C Composite Powder by Equal Channel Angular Pressing

2015 ◽  
Vol 813-814 ◽  
pp. 592-596
Author(s):  
Karunanaithi Saravanan ◽  
Mariappan Senthil Kumar ◽  
Perumal Venkatachalam ◽  
Rajaram Raghavan
Keyword(s):  
Equal Channel Angular Pressing ◽  
Room Temperature ◽  
Composite Powder ◽  
Processing Route ◽  
Channel Angle ◽  
Corner Angle ◽  
Angular Pressing ◽  
Consolidation Behavior

The aim at the present work is to study the consolidation behavior of Al and B4Ccomposite powder processed by Equal Channel Angular Pressing (ECAP) at room temperature. The composition of the composite powder is 95 wt% Al and 5 wt% B4C. The Al-B4C composite powder is subjected to ECAP through processing route A up to 4 passes. The ECAP die used for densification has 90° channel angle and 20° corner angle. It is found that the density and hardness of the composite are improved as the ECAP passes is increased. The microstructure is homogeneous and partial fragmentation of reinforcement is observed. Density and hardness measured after four ECAP are 97% and 98 HV. The improvement of density and hardness is the due strain enhances consolidation of powders during ECAP.

Equal Channel Angular Pressing of Aluminum-Alumina In Situ Metal Matrix Composite

2012 ◽  
Vol 710 ◽  
pp. 247-252 ◽  
Author(s):  
C.N. Athreya ◽  
V.P. Mahesh ◽  
M. Brahmakumar ◽  
T.P.D. Rajan ◽  
K. Narayan Prabhu ◽  
...  
Keyword(s):  
Equal Channel Angular Pressing ◽  
Solution Treatment ◽  
High Hardness ◽  
Grain Structure ◽  
Microstructural Refinement ◽  
Angular Pressing ◽  
Alumina Composite ◽  
6061 Aluminium Alloy ◽  
Cast Condition

The present investigation is on synthesis of in situ Al-alumina composite and to evaluate the effect of equal channel angular pressing on the refinement of the grain structure and enhancement in the hardness and the strength. The billets pressed in as cast condition has shown cracks during first pass. The billets pressed immediately after solution treatment for one pass and followed by ageing treatment immediately after pressing exhibited very high hardness of 125BHN against 95 BHN to that of the T6 condition of 6061 aluminium alloy. The microstructural refinement from 35 µm to 11 µm is obtained in annealed and ECAP 2 pass condition.

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