Article
Materials Science, Multidisciplinary
R. Wang, J. Wang, L. M. Leib, S. Yu, T. Hua, S. S. Shuaia, S. Z. Xua, Z. H. Caob, X. P. Lic, C. Y. Chena, Z. M. Rena
Summary: Using an external static magnetic field can modulate the laser powder bed fusion process, leading to a refined and uniform microstructure, which enhances the mechanical properties of the alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Metallurgy & Metallurgical Engineering
Ying Wang, Pan-yu Chen, Yu-hui Lin, Mei Zhao, Cheng-dong Li
Summary: Modification of Al-Si alloys with Al-12Si/ZnS powder can significantly refine the eutectic Si phase, leading to improved hardness, tensile strength, and elongation of the alloy.
Article
Engineering, Mechanical
Asit Kumar Gain, Liangchi Zhang
Summary: This study aims to manufacture an Al-12Si (wt%) alloy using the selective laser melting (SLM) process and compare its structure, tribological behavior, worn subsurface morphologies, and mechanical properties with conventionally casted Al-Si alloy. The SLMed Al-Si alloy showed nanoscale spherical Si-phase in a supersaturated Al matrix, which significantly improved mechanical properties compared to the conventionally casted alloy. The SLMed Al-Si alloy also exhibited reduced wear rate and subsurface damage due to the refined grain structure and nano-sized Si particles.
Article
Materials Science, Multidisciplinary
Jian Dong, Jufu Jiang, Ying Wang, Minjie Huang, Yingze Liu, Ying Zhang
Summary: The effect of Ti and Sr on the microstructure and mechanical properties of Al-Si-Cu-Ni alloy was investigated. It was found that the addition of 0.1% Ti and 0.02% Sr led to a significant reduction in grain size and a change in the morphology of eutectic Si. Sr promoted the formation of stacking faults and nano-Al2Cu. The ultimate tensile strength, yield strength, and elongation were greatly increased, reaching 239.6 MPa, 140.6 MPa, and 2.11% respectively.
Article
Materials Science, Multidisciplinary
Dongqing Zhang, Kai Zhao, Daoxiu Li, Lei Ren, Guiliang Liu, Sida Liu, Xiangfa Liu
Summary: In this study, novel TiC particles doped with trace amounts of B (TiCB) were introduced to improve the solidification microstructure, extrusion behavior, and mechanical properties of Al-Mn alloy. The results showed that TiCB particles could refine alpha-Al grains, hinder grain growth, and retain geometrically necessary dislocations. Moreover, the addition of TiCB particles significantly improved the mechanical properties of the alloy at room temperature and elevated temperature.
MATERIALS & DESIGN
(2022)
Article
Metallurgy & Metallurgical Engineering
M. Beder, Y. Alemdag
Summary: The study investigated the influence of Mg addition and T6 heat treatment on the Al-Si-Cu-Mg alloys, showing that Mg addition decreased hardness and strength, while T6 treatment significantly improved the mechanical properties and wear resistance of the alloys.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Materials Science, Multidisciplinary
Liwei Wang, Tao Wu, Aiping Liu, Huan Yan, Yaning Mao, Ying Liu, Zhenzhen Peng, Dianlong Wang, Zhimin Liang, Qian Wang, Guang Yang, Balaji Narayanaswamy
Summary: In this study, Al-Mg alloy was produced using cold metal transfer arc additive manufacturing with a strip-shaped Al-5Ti-1B grain refiner. The results showed that the grain refiner acted as heterogeneous nucleation points during solidification, transforming columnar grains into equiaxed ones and refining the grains. Moreover, the grain refiner increased the fraction of low-angle grain boundaries and reduced the anisotropy in mechanical properties. Additionally, it eliminated the low hardness zone between the layers, improving the mechanical properties of the additively manufactured Al-Mg alloy.
Article
Materials Science, Multidisciplinary
Wei Wang, Yubo Zhang, Congcong Yue, Xiangqing Kong, Zhigang Hao, Tongmin Wang, Tingju Li
Summary: Laser power and scan speed are crucial parameters in laser powder bed fusion, affecting defects and microstructures. By adjusting the parameter combination, the performance and microstructure of the samples can be improved.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Wenxue Zhang, Hailin He, Youping Yi, Shiquan Huang
Summary: Rings made of 2219 Al alloy often have poor mechanical properties due to coarse elongated grains and a large number of coarse Al2Cu particles. A novel thermomechanical process was tested to refine the microstructure and improve the mechanical properties. The process involved higher temperature multi-directional forging and lower temperature ring rolling, resulting in increased spherical shapes, reduced coarse Al2Cu particles, and finer grain structure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
J. G. Jeon, J. H. Shin, S. E. Shin, D. H. Bae
Summary: By refining the recrystallized grain sizes, the yield strength and elongation of Al-Si-Mg-Cu-based alloy sheets can be improved while reducing anisotropy. Grain refinement leads to random grain orientations, increasing the plastic strain ratio and optimizing formability.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Ling Lin, Lian Zhou, Yu Xie, Weimin Bai, Faguo Li, Ying Xie, Mingxin Lu, Jue Wang
Summary: In this study, a pre-refinement method was proposed to avoid silicon poisoning and recover the refinement effect of Al-5Ti-1B in Hypoeutectic Al-Si-Mg alloys. The results showed that the pre-refinement alloy had significantly smaller grain diameter and superior mechanical properties after solid-solution and aging heat treatments compared to post-refinement and non-refinement alloys. The proposed method demonstrated effective avoidance of silicon poisoning and optimization of mechanical properties in the alloy.
Article
Chemistry, Physical
Yihan Wen, Yuying Wu, Yongjie Wu, Tong Gao, Zuoshan Wei, Xiangfa Liu
Summary: The aim of this research was to investigate the influence of Al-5Ti-0.25C-0.25B and Al-5Ti-1B master alloys on the mechanical properties and structural characteristics of Al-9.5Si-1.5Cu-0.8Mn-0.6Mg alloy. Field emission scanning electron microscopy (FE-SEM) was used to analyze the microstructure, while tensile testing was conducted to evaluate the mechanical properties. The results demonstrated that the addition of 0.5% Al-5Ti-0.25C-0.25B and 0.5% Al-5Ti-1B master alloys significantly refined the alpha-Al dendrites and improved the ultimate tensile strength and elongation of the extruded alloy.
Article
Chemistry, Physical
Honglei Xi, Wenlong Xiao, Heng Li, Yu Fu, Ge Yi, Juhong Qie, Xiaozhao Ma, Chaoli Ma
Summary: The microstructure evolution and mechanical properties of Al-7Si-0.35Mg alloy with different amounts of submicron-sized TiC particle addition were investigated. The results showed that the addition of TiC improved the mechanical properties, with the best combination obtained at 0.3wt% TiC addition.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Da Teng, Guangzong Zhang, Shuo Zhang, Junwen Li, Renguo Guan
Summary: A356 alloy is a commonly used casting Al-Si alloy with excellent fluidity, airtightness, and thermal resistance. The addition of CRE Al-Ti-C-Ce master alloys with different Ce contents promotes the refinement of grain and coarse needle-like phase in A356 alloy, leading to improved mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Thomas Klein, Aurel Arnoldt, Robert Lahnsteiner, Martin Schnall
Summary: The study explores the processing performance of an advanced Al-Mg-Si alloy with a TiB2-containing structural refiner in WAAM technology, resulting in fine equiaxed grains without crystallographic texture, and showing good yield strength after heat treatment.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)