Article
Chemistry, Physical
H. H. Shen, G. Huang, W. G. Zhang, W. Ding, W. D. Wang, X. S. Zhou, L. Q. Shi, S. M. Peng
Summary: The influencing factors of helium bubble growth in erbium tritides were found to be residual stress, grain size, and impurity elements. Residual stress has a significant impact on the shape of helium bubbles, while grain size and impurity elements affect the size and release fraction of helium bubbles in erbium tritides.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Rameshkumar Varma, Sitarama Kada, Matthew Barnett
Summary: In this study, the effect of deformation on microstructure and thermoelectric properties of Mg2Sn alloys with excess magnesium concentrations was investigated. The alloys showed high plasticity at elevated temperatures, forming a substructure, and the thermoelectric performance was improved due to reduced thermal conductivity from phonon scattering at grain boundaries.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Automation & Control Systems
Serafino Caruso, Domenico Umbrello
Summary: Residual stresses and strains, distortions, heat-affected zone (HAZ), grain size changes, and hardness variation are important aspects to study and control during the gas metal arc welding (GMAW) process. Numerical simulations using finite element method (FEM) software were used to model the GMAW process of AISI 441. The results showed that the predicted thermal phenomena and mechanical properties agreed with experimental findings, demonstrating the reliability of the simulation codes.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yifeng Wang, Guangjie Feng, Xiaowei Pu, Dean Deng
Summary: This paper developed a thermo-elastic-plastic finite element method to simulate welding residual stresses and deformation in low alloy high strength steel joints. The study found that welding sequence has an influence on residual stress distribution and deformation, recommending welding the web first in the fabrication of H-section butt-welded joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Metallurgy & Metallurgical Engineering
Anna Dobkowska, Boguslawa Adamczyk-Cieslak, Milena Koralnik, Witold Chrominski, Jiri Kubasek, Jakub Ciftci, Dariusz Kuc, Jaroslaw Mizera
Summary: The microstructure-dependent corrosion resistance of dual structured fine-grained Mg-7.5Li-3Al-1Zn was investigated by controlling the extrusion ratio. The results showed that the refinement of α(Mg) and β(Li), as well as the distribution of second phases, played a crucial role in the corrosion resistance. However, increasing the extrusion ratio did not improve the corrosion resistance in a chloride-containing solution.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Chemistry, Physical
Hongjie Zhang, Tao Han, Yong Wang, Qian Wu
Summary: The study conducted a comprehensive analysis of the temperature, microstructure, and stress distribution in the in-service repair welding of the X80 pipeline using TMM simulations and verification experiments. The findings highlight the significant impact of the sleeve material strength and fillet weld size on the quality of welding.
Article
Engineering, Industrial
Shiromani Gangoda Desinghege, Peter Hodgson, Matthias Weiss
Summary: This study investigated the effect of material strength, grain size, and C-axis orientation on springback in AZ31 magnesium sheet metal. The research found that springback decreases with increasing grain size but does not change with C-axis orientation, showing more correlation with bending yield strength than tensile yield strength. Experimental results were used to develop analytical equations to explain the impact of material anisotropy on springback behavior in magnesium.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Umashankar Tripathi, Nitin Saini, Rahul S. Mulik, Manas Mohan Mahapatra
Summary: In this study, a gas tungsten arc welding-based wire-arc additive manufacturing setup was developed, and a low-carbon alloy steel was used to fabricate a geometry. The mechanical properties and microstructure of the printed alloy were analyzed, revealing good tensile properties and fracture toughness, but significant scatter in hardness tests concerning the building direction.
CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jinghong Chen, Chong Zhao, Hao Lu, Yanan Li, Xuemei Liu, Haibin Wang, Zuoren Nie, Xiaoyan Song
Summary: The distribution of residual thermal stress in cermets and its interaction with applied stress were studied in WC-Co cemented carbides. The study found that WC grain size significantly influences the residual thermal stress, with smaller grain size, lower Co thin-layer proportion, and higher triple junction proportion beneficial for reducing stress concentration. In cermets with residual thermal stress, the metallic binder shows an increasing strain response rate under external loading, providing insights into adjusting stress distribution for improved mechanical properties.
Article
Chemistry, Physical
Zuzanka Trojanova, Zdenek Drozd, Kristyna Halmesova, Jan Dzugan, Tomas Skraban, Peter Minarik, Gergely Nemeth, Pavel Lukac
Summary: An extruded magnesium AZ31 alloy was processed by rotary swaging and then deformed by tension and compression at room temperature. The work-hardening behavior was analyzed, indicating that dislocation accumulation on obstacles and twin boundaries plays a decisive role in strain hardening. Profuse twinning in compression leads to higher hardening, while the main softening mechanism is attributed to cross-slip between pyramidal planes of different orders.
Article
Nanoscience & Nanotechnology
Zhi Zhang, Jinghuai Zhang, Jinshu Xie, Shujuan Liu, Yuying He, Ru Wang, Daqing Fang, Wei Fu, Yunlei Jiao, Ruizhi Wu
Summary: The addition of trace Sm can significantly increase the grain boundary segregation concentration in the dilute Mg-Zn-Ca-Mn alloy, improve its yield strength, inhibit grain growth during annealing, and contribute to the design of advanced Mg alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Mami Mihara-Narita, Konosuke Asai, Hisashi Sato, Yoshimi Watanabe, Hisashi Mori, Naobumi Saito, Yasumasa Chino
Summary: The interfacial microstructure and hardness of cladding plates produced by explosive welding between magnesium alloys and A6005C aluminum alloy were studied. The bonding interface showed a wavy shape, with adiabatic shear bands and deformation twins forming on the magnesium alloy side. A thin interlayer was observed at the interface. The thickness of the interlayer increased with higher aluminum concentration in the magnesium alloy. Vickers hardness measurements showed that the aluminum alloy had higher hardness compared to the magnesium alloy, with an increase in hardness near the interface. However, nanoindentation tests did not show any increase in hardness at the interface. Residual stress measurements revealed tensile stress on the magnesium alloy side and compressive stress on the aluminum alloy side, possibly due to differences in thermal expansion coefficient between the two alloys.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Chemistry, Physical
Michail Papanikolaou, Konstantinos Salonitis
Summary: The research investigates how the grain size of a pure Aluminium workpiece affects the nanocutting process through Molecular Dynamics simulations. Results show that the cutting forces increase and the friction coefficient decreases with larger grain sizes, leading to higher temperature at the cutting region. Residual stresses at the grain boundaries can be relieved similar to heat treatment as the tool passes over the workpiece.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Zi-Ren Xie, Cheng Zhang, Hu-Cheng Pan, Yu-Xin Wang, Yu-Ping Ren, Gao-Wu Qin
Summary: Electrochemical and immersion tests were conducted to characterize the bio-corrosion resistance of as-extruded Mg-Ca binary alloys with submicron grain size. The microstructures were further characterized by optical microscopy (OM), scanning electronic microscopy and transmission electron microscope (TEM). The Mg-2Ca alloy extruded at 300 degrees C (2Ca-300) exhibits the lowest current density of 1.683 mA·cm-2 and corrosion rate of 22.14 g·m-2·day-1 in simulated body fluid, which is comparable with that of pure Mg. Ca addition can reduce grain size of as-extruded Mg alloy and decrease the corrosion rate. The formed Mg2Ca phases would accelerate the local galvanic corrosion and protect the alpha-Mg matrix simultaneously due to the lower electrode potential. The lower defect density, finer grain size, and weaker basal texture intensity contribute to the excellent bi-corrosion resistance of the 2Ca-300 alloy.
Article
Materials Science, Multidisciplinary
N. Pallavi Senapati, R. K. Bhoi
Summary: This paper presents an experimental analysis of Friction Stir Welding of AA1100 aluminum alloy using a square pin tool, showing higher temperature in the advancing side of the weld compared to the retreating side. It also reveals that the ultimate tensile strength of the welded specimen is increased due to the uniform dispersion of silicon particles in the base material, leading to the formation of equiaxed grains in the nugget region of the weld. Additionally, X-ray diffraction results indicate the formation of alumina in the weld nugget, and residual stress measurements show different distributions based on welding parameters.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Y. Savguira, W. H. Liu, T. H. North, S. J. Thorpe
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2017)
Article
Materials Science, Coatings & Films
P. H. Sobrinho, Y. Savguira, Q. Ni, S. J. Thorpe
SURFACE & COATINGS TECHNOLOGY
(2017)
Article
Electrochemistry
Y. Savguira, T. H. North, S. J. Thorpe
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2018)
Article
Electrochemistry
Y. Savguira, T. H. North, S. J. Thorpe
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2018)
Article
Materials Science, Multidisciplinary
Y. Savguira, W. H. Liu, D. J. Miklas, T. H. North, S. J. Thorpe
Article
Electrochemistry
Y. Savguira, T. H. North, A. P. Gerlich, S. J. Thorpe
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2018)
Article
Materials Science, Multidisciplinary
Y. Savguira, T. H. North, S. J. Thorpe
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2014)
Article
Engineering, Geological
J. Hadjigeorgiou, Y. Savguira, S. J. Thorpe
ROCK MECHANICS AND ROCK ENGINEERING
(2019)
Proceedings Paper
Electrochemistry
Y. Savguira, T. H. North, S. J. Thorpe
SELECTED PROCEEDINGS FROM THE 231ST ECS MEETING
(2017)
Article
Materials Science, Multidisciplinary
Yuri Savguira, Thomas H. North, Steven J. Thorpe
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
(2017)
Proceedings Paper
Electrochemistry
Y. Savguira, T. H. North, S. J. Thorpe
CORROSION (GENERAL) - 225TH ECS MEETING
(2014)
