Article
Thermodynamics
Ang Zhang, Zhipeng Guo, Bin Jiang, Jiangfeng Song, Fusheng Pan, Shoumei Xiong
Summary: This study investigates the effect of thermal shock on eutectic evolution using a multiphase-field lattice-Boltzmann method by imposing a laser spot inside the melt. Multiple linear regression analysis summarizes the correlation between feature parameters and technical factors. The presence of a laser spot can bend the solidification front and be used as an efficient tool to obtain engineered patterns.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Multidisciplinary
Tamas Pusztai, Laszlo Ratkai, Levente Horvath, Laszlo Granasy
Summary: The melting behavior of 2D lamellar and 3D rod eutectic structures was studied using multi-phase-field simulations. It was found that the melting positions depend on the volume fraction and average composition of the initial solid phases. The study also observed two types of instabilities in the non-planar melting region.
Article
Materials Science, Multidisciplinary
Silvere Akamatsu, Sabine Bottin-Rousseau
Summary: The study focused on the tilted lamellar growth patterns during directional solidification of nonfaceted binary eutectic alloys, by considering the anisotropy of the interphase boundaries. Using numerical simulations, the lamellar-locking effect and tilted lamellar patterns were observed, with empirical matching to experimental observations. The influence of various control parameters on the tilted-lamellar pattern was systematically studied, leading to the identification of experimentally accessible conditions for theoretical predictions.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
E. J. Sullivan, J. A. Tomko, J. M. Skelton, J. M. Fitz-Gerald, P. E. Hopkins, J. A. Floro
Summary: Scanning laser melting was used to investigate directional solidification in Al-Cu thin films. Regular lamellar microstructure was observed in eutectic films, while a complex lamellar structure was found in hypoeutectic films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Qing Cai, Changming Fang, Chamini Mendis, Isaac T. H. Chang, Brian Cantor
Summary: Eutectic alloys were fabricated from the quaternary Al-Cu-Si-Ni system, and a ternary eutectic reaction was found. The as-solidified microstructure exhibited a lamellar theta-Al2(CuNi) phase and fibrous Si morphology. The thermal stability of the eutectic alloy was investigated, and the Ni solution in theta-Al2(CuNi) phase contributed to its thermal stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jessica Friess, Philipp Rayling, Ulrike Hecht, Amber Genau
Summary: This study investigates the mechanisms of grain growth competition in ternary eutectics during directional solidification by using SEM, quantitative image analysis, and EBSD. It discovers faceted interphase boundaries of Ag2Al and complex interactions at grain boundaries depending on crystallographic orientation, calling for revised models to evaluate microstructure formation in ternary eutectics.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Sung-Ryul Mang, Hoon Choi, Hoo-Jeong Lee
Summary: The solder properties of Sn-Bi-In ternary solders with seven different compositions were examined. The study found that solder with different compositions exhibited different pasty zones and microstructures, and the shear strength ranged from 41 to 63 MPa.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Norhuda Hidayah Nordin, Leong Zhaoyuan, Russell Goodall, Iain Todd
Summary: Control over a lamellar-like-structured high entropy alloy system can be achieved by replacing aluminum with boron. The addition of boron influences the microstructure and phase formation, and the presence of Fe2B phase correlates with interfacial energy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Soodabeh Azadehranjbar, Bingqiang Wei, Dongyue Xie, Kaisheng Ming, Jian Wang, Jeffrey E. Shield
Summary: Magnesium alloys are appealing for automotive and aerospace applications due to their low density and high strength-to-weight ratio. However, their current use is limited by low strength and poor formability at ambient temperatures. Two-phase nanostructured materials offer a promising solution to enhance the mechanical properties of magnesium alloys, with either fibrous or lamellar morphologies formed via eutectic transformation. During mechanical testing, the lamellar morphology showed superior strength and plasticity compared to the fibrous morphology and pure magnesium. The higher strength in the fibrous eutectic came at the expense of lower plasticity, while the high plasticity of the lamellar morphology was attributed to factors such as high dislocation activity and role of alpha layers in restricting shear instabilities.
Article
Metallurgy & Metallurgical Engineering
Koji Hagihara, Kosuke Miyoshi
Summary: It has been found that kink-band formation can be induced by microstructural control under applied stress, leading to improved ductility and yield stress in magnesium alloys. This opens up possibilities for the development of novel high-strength structural materials.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Nanoscience & Nanotechnology
Sabine Bottin-Rousseau, Victor T. Witusiewicz, Ulrike Hecht, Jose Fernandez, Ana Laveron-Simavilla, Silvere Akamatsu
Summary: The study presents the first observations of coexistence between rod-like and lamellar growth patterns during directional solidification of a eutectic alloy. In situ experiments on the ISS showed that under specific conditions, these two growth patterns can transition into each other within the same system, with dynamic faceting of the boundary on a large scale.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Fang Wang, Xue-Mei Luo, Li-Ming Lei, Xin Fu, Bin Zhang, Guang-Ping Zhang
Summary: This study estimated the strengthening abilities and barrier strength of the alpha/beta lamellar interfaces and coarse primary/fine secondary alpha lamellae interfaces in Ti alloys based on the lattice and modulus mismatches. The results showed that the alpha/beta lamellar interfaces had higher strengthening abilities and interface barrier strength compared to the coarse primary/fine secondary alpha lamellae interfaces. The study also observed a variation trend in the interface strengthening abilities with the fraction of alpha/beta interfaces, providing a potential strategy for enhancing the strength or deformability of lamellar Ti alloys through manipulating interface properties.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Physical
C. J. Lin, L. Peng, J. W. Xian, Q. Li, C. M. Gourlay
Summary: In hypoeutectic Mg-Al-based alloys, Mg17Al12 forms by a eutectic reaction that is usually divorced. The nucleation, growth, and morphology of Mg17Al12-containing eutectic in a multicomponent Mg-9Al-0.7Zn-0.2Mn alloy are investigated. Mg17Al12 forms an interconnected 3D skeleton and occasionally has a preferred orientation relationship with alpha-Mg. The degree of partially divorced growth depends on geometric measures, and fully coupled eutectic microstructures can be generated by manipulating the solidification time and cooling rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Luling Wang, Jianqiu Zhou, Hongxi Liu, Feng Zhang
Summary: The lamellar eutectic structure in this study displays unique grain rotation behavior under tensile loading, enhanced by the sensitivity of heterophase interface to local shear strain. This promotes plastic co-deformation between phases and leads to more severe grain rotation, thereby releasing local stress concentration and enhancing ductility.
Article
Mathematics, Applied
Qin Yang, Ang Zhang, Bin Jiang, Liang Gao, Zhipeng Guo, Jiangfeng Song, Shoumei Xiong, Fusheng Pan
Summary: Control of eutectic growth trajectory is technologically important. Convection affects eutectic growth by changing solute distribution and can lead to transitions between different eutectic patterns.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)