Article
Materials Science, Multidisciplinary
Walaa Abdel-Aziem, Atef Hamada, Takehiko Makino, Mohsen A. Hassan
Summary: The study focused on the micro/meso-forming of commercially pure aluminum AA1070 through 4 deformation passes using ECAP at room temperature. The findings showed that as the number of passes increased, there was a transition from a non-uniform grain structure to a uniform ultrafine-grained structure, resulting in a significant improvement in hardness. Additionally, the micro/meso-scale ECAP was capable of developing a weak texture in the flow plane compared to the starting texture.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Shipeng Yue, Jianping Qu, Guoliang Li, Shichao Liu, Zhongkai Guo, Jinchuan Jie, Yubo Zhang, Tingju Li
Summary: This study investigated the microstructure evolution and mechanical properties of Cu-3Ag-xZr alloys processed by equal channel angular pressing at room temperature. The results showed that significant grain refinement and excellent comprehensive properties were achieved, which could provide a feasible way for the preparation of high-performance alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Song-Jeng Huang, Matoke Peter Mose, Veeramanikandan Rajagopal
Summary: The ECAP method significantly refines the microstructure of AZ61 alloy, enhancing its hydrogen storage capacity and reaction kinetics. The addition of Ni catalyst after ECAP treatment accelerates hydrogen absorption and desorption kinetics.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Shiwen Hu, Taojun Li, Qinglin Li, Dexue Liu
Summary: Equal channel angular pressing (ECAP) was used to enhance the mechanical properties and wear resistance of a biomedical TiZrNb medium entropy alloy (MEA). The alloy exhibited an increased yield strength and hardness after multiple deformation passes, with the formation of coarse grains and dense dislocation walls (HDDWs) that evolved into shear bands.
Article
Materials Science, Multidisciplinary
Ryuichi Yamada, Shoichiro Yoshihara, Yasumi Ito
Summary: The use of stents to expand narrowed tubular organs like blood vessels can lead to late thrombosis, restenosis, and chronic inflammation when made from stainless steel. Biodegradable magnesium stents have been introduced to combat these issues, but suffer from poor ductility and fatigue performance. Further research is needed for new alloys and stent designs.
Article
Materials Science, Multidisciplinary
M. Zhang, G. L. Shuai, Y. Q. Wang, Z. Li, D. T. Zhang, H. Z. Yu, L. Li
Summary: After ECAP treatment, Al-Fe alloy shows an increase in the number of pitting corrosion but a decrease in the size of pit corrosion, due to the fragmentation and uniform distribution of precipitated phases. The increase in grain boundary density and the reduction of precipitated phase aggregation also contribute to the decrease in intergranular corrosion. This study provides a new approach to improve the corrosion resistance of Al-Fe alloys by transforming the corrosion mode from local to uniform.
Article
Multidisciplinary Sciences
Przemyslaw Snopinski
Summary: This study focused on electron microscopy studies of microstructural defects in an additively manufactured AlSi10Mg alloy. The findings revealed that deformation twinning, phase transformation, and amorphization are possible deformation mechanisms for the silicon phase. It was also found that dislocation slip and stacking faults were the predominant deformation modes for the aluminum matrix. These findings contribute to a better understanding of the deformation micro-mechanism of the alloy and provide potential for the development of new structural materials.
Article
Metallurgy & Metallurgical Engineering
A. Rezaei, R. Mahmudi, R. E. Loge
Summary: The microstructure of the extruded Mg-6Gd-3Y-1.5Ag alloy was refined through ECAP processing, resulting in improved superplastic behavior.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Weiyang Wang, Shuang Zhou, Zhu Xiao, Wenting Qiu, Qian Lei
Summary: This study investigated the microstructure evolution and properties of a CuCrZrSc alloy undergoing aging treatment and equal channel angular pressing (ECAP). The results showed that pre-aging treatment significantly improved the mechanical properties and electrical conductivity of the alloy. After 12 passes of deformation and aging treatment, the alloy exhibited enhanced mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Y. L. Bian, Z. D. Feng, N. B. Zhang, Y. X. Li, X. F. Wang, B. B. Zhang, Y. Cai, L. Lu, S. Chen, X. H. Yao, S. N. Luo
Summary: This study investigates the processing of a high-entropy alloy through dynamic equal channel angular pressing (D-ECAP) and subsequent annealing, and observes the occurrence of kink bands within a face-centered cubic HEA. The strengthening mechanisms are discussed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Zhu Xiao, Weiyang Wang, Qian Lei, Biaobiao Yang, Meng Wang, Yihai Yang, Daren Zhou, Zhou Li
Summary: The microstructural evolution and property variations of CuCrZrY alloy processed by ECAP were systematically studied. After multiple passes of ECAP, the average grain size decreased significantly, leading to improved mechanical properties and electrical conductivity. The main strengthening mechanisms include precipitation strengthening, low-angle grain boundary strengthening, and high-angle grain boundary strengthening. The inconsistency of strain force between outer and inner regions may result in the inhomogeneity of microstructure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Salaheddine Sadi, Abdelkader Hanna, Hiba Azzeddine, Casimir Casas, Thierry Baudin, Anne-Laure Helbert, Francois Brisset, Jose Maria Cabrera
Summary: The microstructure and texture of binary Mg-0.3Ce alloy were investigated after ECAP processing at 300 and 350 degrees C. Effective grain refinement was achieved through dynamic recrystallization, with different mechanisms observed at different temperatures. Texture development varied based on strain level and DRX mechanisms, forming a typical basal texture at 300 degrees C and a different texture at 350 degrees C due to grain size.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
M. M. Hoseini-Athar, R. Mahmudi, R. Prasath Babu, P. Hedstrom
Summary: The study found that the Mg-2Gd-3Zn (GZ23) alloy exhibited a superior microstructure and mechanical properties, as well as better superplastic behavior at lower ECAP passes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Tarek Khelfa, Jairo-Alberto Munoz-Bolanos, Fuguo Li, Jose-Maria Cabrera-Marrero, Mohamed Khitouni
Summary: This study investigates the strain-hardening behavior of an AA6060 alloy processed by equal channel angular pressing (ECAP) up to 12 passes. Results show that the geometrically necessary dislocations (GNDs) density increases continually up to the fourth pass and then saturates, while the strain-hardening capacity and exponent of deformed specimens are lower than the as-received condition, with the strain-hardening rate fluctuating with the ECAP passes. The difference in strain-hardening behavior is attributed to the grain size effect, with the Kocks-Mecking-Estrin (KME) model used to depict the storage and annihilation of dislocations.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Lisa-Marie Rymer, Lisa Winter, Kristin Hockauf, Thomas Lampke
Summary: The combination of severe plastic deformation by equal-channel angular pressing (ECAP) and subsequent heat treatment significantly affects the precipitation characteristics of age-hardenable aluminum alloys. The aging kinetics is accelerated and the morphology of the precipitates is influenced by the induced strain. The study examines the influence of artificial aging time and resulting precipitation morphology on fatigue threshold in aluminum alloy 6060, with emphasis on grain size and coherent precipitates' impact on crack propagation resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
